CN102954981A - Device and method for testing performance of high-temperature pipeline heat insulation clad material - Google Patents
Device and method for testing performance of high-temperature pipeline heat insulation clad material Download PDFInfo
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- CN102954981A CN102954981A CN2012103258919A CN201210325891A CN102954981A CN 102954981 A CN102954981 A CN 102954981A CN 2012103258919 A CN2012103258919 A CN 2012103258919A CN 201210325891 A CN201210325891 A CN 201210325891A CN 102954981 A CN102954981 A CN 102954981A
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Abstract
The invention discloses a device and a method for testing the performance of a high-temperature pipeline heat insulation clad material. The device comprises a combustion furnace, a heating pipe, a hot airflow discharge pipe, a thermocouple thermometer and an infrared thermometer, wherein the tested heat insulation material is sprayed or coated on a heating straight pipe; the combustion furnace serves as a heating source, the flame size can be adjusted, the hot airflow discharge is controlled, and the inner temperature is adjusted to a required testing temperature; the temperature of the inner pipe and the heat insulation outer surface is measured, comparative reference is formed, and the heat insulation performance is obtained; and meanwhile, the evaluation of mechanical strength of a heat insulation material on a similar high-temperature exhaust pipe part is simulated. The device has the advantages that 1. the measurable temperature is high, and the temperature can be controlled to be between 20 and 1200 DEG C; 2. the advantages of the heat insulation effect and the mechanical property can be intuitively given; and 3. a set of accurate and feasible device for testing and evaluating heat insulation property of the heat insulation material suitable for an exhaust pipe part of a large ship can be formed.
Description
Technical field
The present invention relates to a kind of heat insulating property test device and method of testing, particularly a kind of proving installation and method of testing for large ship high-temperature exhaust pipe insulated material property effect.
Background technology
High temperature resistant heat insulation material is at high-temperature pipe, particularly in the insulation of the large ship exhaust pipe of engine of temperature above 500 ℃ very important application is arranged, its performance quality is directly connected to pipeline and personnel's security on every side thereof, maintains many-sided problems such as duration and cost, environmental protection.Particularly at limited space, the high-temperature exhaust pipe position of external form complexity adopts the plasticity heat-barrier material to have very big advantage.Needed insulation material is not only the quality in the cooling and insulating performance, also to satisfy at different casts simultaneously, and under the various orientation, the adhesion intensity of material itself, the specific (special) requirements of stretching torsional strength.Guarantee material in long-range circumstances, can not produce come off, the problem such as cracking, sintering.These need to be to the various performances of material, construction technology, and the coating method for coating carries out a large amount of development tests.If site test is invested hugely, and be difficult to get clear technical limits, thereby cause unnecessary manpower goods and materials waste.
Existing pipe insulation material properties test means are mainly take the laboratory heat-conducting oil pipes as prototype, and the conduction oil temperature is up to 400 ℃, are difficult to simulate high-temperature pipe more than 500 ℃, can't be to heat-barrier material performance accurate evaluation.Measure temperature surpass 500 ℃ must be not easy to test construction by the Large Tube pipeline equipment, the test period cycle is long, simulates the position reappearance, reliability is bad, test result is unilateral.
Summary of the invention
Goal of the invention of the present invention is in order to overcome the deficiencies in the prior art part, the feature of simulation high-temperature pipe, a kind of heat insulating property test device of high-temperature pipe insulated material is provided, carry out the performance study to insulation material, determine technical limits, from site technique is played the technological guidance, realize the full test to the heat insulation technique of on-the-spot pipeline, putting into practice of science avoided unnecessary investment.
Goal of the invention of the present invention is achieved by the following technical solution: a kind of heat insulating property test device of high-temperature pipe insulated material, comprise a heating arrangement, the hot-air mouth of heating arrangement is connected to a heating tube, evenly scribble heat-barrier material to be tested on this heating tube outer wall, this heating tube top is connected a hot-fluid emissions adjustment pipe, hot-fluid emissions adjustment pipe and heating tube have a circular ring type interface, the exit of this hot-fluid emissions adjustment pipe is provided with the flexible cover plate that adjusts airshed, seven points of described temperature measuring point Vertical Uniform distribution, locate respectively measuring tube inwall and appearance temperature at every, inner wall temperature enters heating tube by thermocouple lead from interface, can be along each point place temperature survey in the heating tube inwall up-down stretch measuring tube, the appearance temperature is measured by infrared thermometer.
Principle of heating of the present invention is: the combustion furnace flame combustion produces thermal current, by regulating flame size, the control hot stream temperature, thermal current begins to move upward from heating tube base burning stove, through heating tube, heating tube is heated up, after thermal current reduces flow velocity from the interface circular hole, enter again hot-fluid emissions adjustment pipe, behind the floss hole Displacement Regulation, emit.Thermocouple lead enters heating tube from interface, can be along the heating tube inwall, and each point place temperature in the up-down stretch measuring tube.
The invention has the beneficial effects as follows: adjustable heating arrangement, thermal current discharging is controlled, internal temperature is adjusted in test temperature required.Then measure inner tube and insulation appearance temperature, form the contrast reference, draw heat-proof quality; Simulated simultaneously the evaluation of insulation material mechanical strength quality on the similar high-temperature exhaust pipe position.Advantage of the present invention:
1. can measure temperature high, temperature controllable is between 20 ~ 1200 ℃.
2. can provide intuitively effect of heat insulation quality, the quality of mechanical property.
3. can form accurately feasible adaptation large ship gas outlet position heat-insulating heat-preserving material heat-proof quality test evaluation device of a cover.
4. this proving installation is simple in structure, processing ease, easily mobile the installation.
Description of drawings
Fig. 1 is the structural representation of this insulation material effect of heat insulation proving installation
1, combustion furnace 2, heating tube 3, thermocouple temperature measurement instrument 4, interface 5, hot-fluid emissions adjustment pipe 6, flexible cover plate.
Specific embodiment
The present invention will be further described below in conjunction with accompanying drawing:
The present invention includes as shown in Figure 1 combustion furnace (1), the hot-air mouth of combustion furnace is connected to heating tube (2), this heating tube top is connected hot-fluid emissions adjustment pipe (5), the exit of this hot-fluid emissions adjustment pipe is provided with the flexible cover plate (6) that adjusts airshed, all be provided with temperature measuring point on the inner and outer wall of described heating tube, temperature measuring point also is connected to thermocouple temperature measurement instrument (3).
Described heating arrangement is burner apparatus, and this burner apparatus is natural gas stove or gas stove or acetylene steam stove or other combustion heat source devices.
Described heating tube is cast carbon steel or wrought iron leather hose or carbon steel pipe, and heating tube can be straight type or straight type with elbow or straight type with a cast.
Hot-fluid emissions adjustment pipe is galvanized iron leather hose or cast carbon steel or carbon steel pipe.
Further described burner apparatus is that cast iron materials is made, with the gas flame control valve.
Described hot-fluid emissions adjustment tube shape is tubaeform, and bore dwindles gradually from down to up.
Also having described heating tube height is 1～1.5m, and external diameter is 18～25cm, seven points of described temperature measuring point vertical distribution, interval 15cm between per 2, locate respectively measuring tube inwall and appearance temperature at every, inner wall temperature is measured by thermocouple lead, and the appearance temperature is measured by infrared thermometer.Levy be described thermocouple lead with scale, graduation range is corresponding with the measurement point range distribution, lead-in wire enters heating tube from interface, can be along the heating tube inwall, according to each point place temperature in the lead-in wire scale up-down stretch measuring tube.
Concrete described burner apparatus Flame Heating Temperature scope is 20～1200 ℃ again;
Described thermopair range is-50 ℃ ~ 1300 ℃, 1 ℃ of resolution, precision ± 1 ℃, probe lead length 1m.
The method of testing of using the present invention to test the high temperature insulating material heat-insulating cooling effect:
(1) evenly be coated with a kind of heat-barrier material at the heating tube outer wall, coating thickness is 17mm, and described heating tube height is 1m, and external diameter is 18cm;
(2) heat insulating property test device of unlatching high-temperature pipe insulated material claimed in claim 1, open the thermocouple temperature measurement instrument, open combustion furnace, regulate flame size, regulate simultaneously the hot-fluid delivery pipe and keep the temperature that requires, use manual time-keeping, measure respectively the appearance temperature of seven temperature measuring points every 15 minutes use infrared thermometers, record simultaneously the inwall electric thermo-couple temperature, and make the test temperature record form, as shown in table 1;
Table 1 test temperature record
Test period was 2 weeks, day-to-day test duration 6 hours.During this time every day observed and recorded insulation material barment tag, strength character changes, and makes the evaluation of material property according to evaluation method, and is as shown in table 2.This evaluation method is:
1) through-wall crack must not be arranged: penetrate the goods either direction with straight line or non-rectilinear form, comprise the crackle of length, width or thickness, record in the test without through-wall crack and number;
2) the outward appearance physical dimension is measured length and variation in thickness: in the length of measuring shell from shell edge 20 mm and center with straight steel ruler, be accurate to 1 mm respectively, measurement result is the mean value of 3 readings; Thickness uses clamp and straight steel ruler at the shell edge, from two ends 20mm and center position measurement, is accurate to 0.5mm respectively, and measurement result is the mean value of 3 readings, and overall dimensions must not change above 3mm;
3) the lonitudinal warping degree must not surpass 0.5% or 3mm of goods length, and method is: the ruler frame is observed back and forth in the upper of the vertical vertical plane of pipe, measured the ruler lower edge to the maximal clearance X of plate face with another straight steel ruler, be accurate to 1mm, get the maximal value record;
4) temperature conductivity is calculated: (appearance temperature-averaging value ÷ inner wall temperature mean value) * 100%, and temperature conductivity must not be higher than 25%, and heat transfer efficiency is more low better;
5) remnant compressive strengths must not be less than 0.2MPa, presses with hand distortion or cracked to occur.
Table 2 physical property evaluation
Claims (7)
1. the heat insulating property test device of a high-temperature pipe insulated material, it is characterized in that this proving installation comprises a heating arrangement, the hot-air mouth of heating arrangement is connected to a heating tube, evenly scribble heat-barrier material to be tested on this heating tube outer wall, this heating tube top is connected a hot-fluid emissions adjustment pipe, hot-fluid emissions adjustment pipe and heating tube have a circular ring type interface, the exit of this hot-fluid emissions adjustment pipe is provided with the flexible cover plate that adjusts airshed, seven points of described temperature measuring point Vertical Uniform distribution, locate respectively measuring tube inwall and appearance temperature at every, inner wall temperature enters heating tube by thermocouple lead from interface, can be along each point place temperature survey in the heating tube inwall up-down stretch measuring tube, the appearance temperature is measured by infrared thermometer.
2. the heat insulating property test device of high-temperature pipe insulated material according to claim 1 is characterized in that described heating arrangement is burner apparatus, and this burner apparatus is natural gas stove or gas stove or acetylene steam stove or other combustion heat source devices; Described heating tube is cast carbon steel or wrought iron leather hose or carbon steel pipe, and heating tube is straight type or straight type with elbow or straight type with a cast; Hot-fluid emissions adjustment pipe is galvanized iron leather hose or cast carbon steel or carbon steel pipe.
3. the heat insulating property test device of high-temperature pipe insulated material as claimed in claim 1 is characterized in that described hot-fluid emissions adjustment tube shape is tubaeform.
4. such as the heat insulating property test device of claim 1 or 2 or 3 described high-temperature pipe insulated materials, it is characterized in that described heating tube height is 1～1.5m, external diameter is 18～25cm, seven points of described temperature measuring point vertical distribution, interval 15cm between per 2, locate respectively measuring tube inwall and appearance temperature at every, inner wall temperature is measured by thermocouple lead, and the appearance temperature is measured by infrared thermometer.
5. the heat insulating property test device of high-temperature pipe insulated material as claimed in claim 4, it is characterized in that described thermocouple lead is with scale, graduation range is corresponding with the measurement point range distribution, lead-in wire enters heating tube from interface, can be along the heating tube inwall, according to each point place temperature in the lead-in wire scale up-down stretch measuring tube.
6. the method for testing of the heat-proof quality of a high-temperature pipe insulated material is characterized in that the method comprises the steps:
(1) evenly be coated with heat-barrier material at the heating tube outer wall, coating thickness is 17mm, and described heating tube height is 1m, and external diameter is 18cm;
(2) heat insulating property test device of unlatching high-temperature pipe insulated material claimed in claim 1, open the thermocouple temperature measurement instrument, open combustion furnace, regulate flame size, regulate simultaneously the hot-fluid delivery pipe and keep the temperature that requires, use manual time-keeping, measure respectively the temperature of seven temperature measuring points every 15 minutes use infrared thermometers, and make the test temperature record form;
(3) test period was 2 weeks, day-to-day test duration 6 hours, during every day observed and recorded insulation material barment tag, strength character changes, and makes the evaluation of material property according to evaluation method.
7. the method for testing of the heat-proof quality of high-temperature pipe insulated material as claimed in claim 6 is characterized in that the evaluation method in the method step (3) is:
1) through-wall crack must not be arranged: penetrate the goods either direction with straight line or non-rectilinear form, comprise the crackle of length, width or thickness, record in the test without through-wall crack and number;
2) the outward appearance physical dimension is measured length and variation in thickness: in the length of measuring shell from shell edge 20 mm and center with straight steel ruler, be accurate to 1 mm respectively, measurement result is the mean value of 3 readings; Thickness uses clamp and straight steel ruler at the shell edge, from two ends 20mm and center position measurement, is accurate to 0.5mm respectively, and measurement result is the mean value of 3 readings, and overall dimensions must not change above 3mm;
3) the lonitudinal warping degree must not surpass 0.5% or 3mm of goods length, and method is: the ruler frame is observed back and forth in the upper of the vertical vertical plane of pipe, measured the ruler lower edge to the maximal clearance X of plate face with another straight steel ruler, be accurate to 1mm, get the maximal value record;
4) temperature conductivity is calculated: (appearance temperature-averaging value ÷ inner wall temperature mean value) * 100%, and temperature conductivity must not be higher than 25%, and heat transfer efficiency is more low better;
5) remnant compressive strengths must not be less than 0.2MPa, presses with hand distortion or cracked to occur.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672275A (en) * | 2013-12-25 | 2014-03-26 | 贵州永润煤业有限公司 | Method and structure for improving strength of water supply elbow of rock drill |
| CN104849306A (en) * | 2014-12-19 | 2015-08-19 | 北汽福田汽车股份有限公司 | Method for evaluating heat insulation performance of vehicle exhaust pipe heat insulating layer |
| CN106896136A (en) * | 2017-04-19 | 2017-06-27 | 中国人民解放军装甲兵工程学院 | A kind of magnetized plasma heat-insulated effect regulation detection means and its detection method |
| CN110702729A (en) * | 2019-09-19 | 2020-01-17 | 中国石油大学(华东) | Device and method for testing heat insulation performance of vacuum heat insulation sleeve under simulated frozen soil environment |
| CN111735846A (en) * | 2020-07-16 | 2020-10-02 | 安徽理工大学 | Device and method for testing heat preservation and cold insulation performance of material under confining pressure |
| CN112362695A (en) * | 2020-11-16 | 2021-02-12 | 广东电网有限责任公司电力科学研究院 | Heat dissipation index sensor |
| CN112946019A (en) * | 2021-02-08 | 2021-06-11 | 凯龙高科技股份有限公司 | Diesel engine tail gas post-treatment heat preservation and heat insulation performance test method |
| CN113433162A (en) * | 2021-05-20 | 2021-09-24 | 中国舰船研究设计中心 | Electric heating control measurement system and method |
| CN113820358A (en) * | 2021-10-25 | 2021-12-21 | 国网山东省电力公司电力科学研究院 | Portable fireproof material detection device |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672275A (en) * | 2013-12-25 | 2014-03-26 | 贵州永润煤业有限公司 | Method and structure for improving strength of water supply elbow of rock drill |
| CN104849306A (en) * | 2014-12-19 | 2015-08-19 | 北汽福田汽车股份有限公司 | Method for evaluating heat insulation performance of vehicle exhaust pipe heat insulating layer |
| CN104849306B (en) * | 2014-12-19 | 2017-12-08 | 北汽福田汽车股份有限公司 | A kind of method for the heat-proof quality for assessing blast duct for vehicle thermal insulation layer |
| CN106896136A (en) * | 2017-04-19 | 2017-06-27 | 中国人民解放军装甲兵工程学院 | A kind of magnetized plasma heat-insulated effect regulation detection means and its detection method |
| CN106896136B (en) * | 2017-04-19 | 2023-11-17 | 中国人民解放军装甲兵工程学院 | Magnetization plasma heat insulation effect adjustment detection device and detection method thereof |
| CN110702729A (en) * | 2019-09-19 | 2020-01-17 | 中国石油大学(华东) | Device and method for testing heat insulation performance of vacuum heat insulation sleeve under simulated frozen soil environment |
| CN111735846A (en) * | 2020-07-16 | 2020-10-02 | 安徽理工大学 | Device and method for testing heat preservation and cold insulation performance of material under confining pressure |
| CN112362695A (en) * | 2020-11-16 | 2021-02-12 | 广东电网有限责任公司电力科学研究院 | Heat dissipation index sensor |
| CN112946019A (en) * | 2021-02-08 | 2021-06-11 | 凯龙高科技股份有限公司 | Diesel engine tail gas post-treatment heat preservation and heat insulation performance test method |
| CN113433162A (en) * | 2021-05-20 | 2021-09-24 | 中国舰船研究设计中心 | Electric heating control measurement system and method |
| CN113820358A (en) * | 2021-10-25 | 2021-12-21 | 国网山东省电力公司电力科学研究院 | Portable fireproof material detection device |
| CN113820358B (en) * | 2021-10-25 | 2024-03-26 | 国网山东省电力公司电力科学研究院 | Portable fireproof material detection device |
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