CN101818835A - High-temperature resistant composite thermal insulating tube and manufacturing method thereof - Google Patents
High-temperature resistant composite thermal insulating tube and manufacturing method thereof Download PDFInfo
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- CN101818835A CN101818835A CN 201010159458 CN201010159458A CN101818835A CN 101818835 A CN101818835 A CN 101818835A CN 201010159458 CN201010159458 CN 201010159458 CN 201010159458 A CN201010159458 A CN 201010159458A CN 101818835 A CN101818835 A CN 101818835A
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Abstract
The invention provides a high-temperature resistant composite thermal insulating tube and a manufacturing method thereof. An inorganic high-temperature resistant thermal insulating layer, a polyurethane thermal insulating layer and a rubber sleeve are sequentially arranged on the outer side of the tube wall of the tube cavity of a steel tube. The high-temperature resistant composite thermal insulating tube is manufactured by the following steps of: 1, manufacturing inorganic high-temperature resistant thermal insulating slurry; 2, manufacturing an inorganic high-temperature resistant thermal insulating sheet; 3, cladding the inorganic high-temperature resistant thermal insulating layer; 4, drying the inorganic high-temperature resistant thermal insulating layer; and 5, filling the polyurethane thermal insulating layer. Because the inorganic high-temperature resistant thermal insulating layer is clad on the outer side of the tube wall and the polyurethane thermal insulating layer is filled on the outer side of the inorganic high-temperature resistant thermal insulating layer, pipeline high-temperature resistance and convenient and quick mechanical construction can be realized. The high-temperature resistant composite thermal insulating tube has the advantages of easy and quick construction and convenient mechanization, and the manufactured high-temperature resistant layer of a pipeline has high-temperature resistance. The high-temperature resistant composite thermal insulating tube is suitable to be applied to cladding the thermal insulating layer on the outer side of the high-temperature pipeline, and producing and constructing a high-temperature resistant composite thermal insulating tube.
Description
Technical field
What the present invention proposed is the thermal insulating material in thermal technology field, specifically a kind of high-temperature resistant composite thermal insulating tube and manufacture method.
Background technique
Before the present invention proposes, add thermal insulation layer for the pipe of easy heat conducting transmission working medium or the container that holds material, with minimizing working medium and the transmission of heat of air ambient and the loss of thermoconvection and radiation, thereby guarantee that working medium reduces dissipation of heat energy, also reaches purpose of energy saving.For the material that is transmitted, a kind of is that working medium is the condition of high temperature, and insulation then is the reduction that reduces temperature, and a kind of is low-temperature condition, prevents that cryogenic fluid from absorbing airborne heat and the working medium temperature is raise.No matter be low temperature or high temperature, all need by pipeline and the container of carrying or holding is incubated, thereby reduce the heat exchange of itself and ambient temperature.
Has the thermal insulation layer that thermal-protective material constitutes in order to realize insulation, to need thermal insulating material to lay.The material of present employed thermal insulation layer has the organic heat-insulating layer, as polyurethane foam material, polyurethane foamed material; Also have inorganic thermal insulation layer, adopt foamed material usually, as expanded perlite, silicon calcium material with hole; Lamination coating is also arranged, comprise organic fibrous material and inorganic fibers, use has rock wool widely usually.The shortcoming that above-mentioned thermal insulating material exists is: organic insulation material burns easily, and serviceability temperature is low, melts easily under higher temperature conditions or ablation and distortion, influences the soundness and the whole heat insulating ability of thermal insulation layer; Inorganic heat insulation material thermal conductivity height causes volume big, and difficulty of construction is big, and heat insulation effect is poor; Though the lamination coating thermal insulation property is comparatively good, construction trouble, efficient is low, rock wool material especially, when not only producing power consumption high, and short fibre is elegant in air easily, is sucked by people lung easily, causes anthraco-silicosis, so now limited use.
At present, for pipeline heat insulation, the way that adds thermal insulation layer usually is: at the arranged outside gum cover of metal tube, the material of filled with polyurethane foam in the gap between gum cover and metal tube is by foaming, in the filling gap, interior pipe and gum cover bonding are become one, form pipe insulating layer.
Yet, for the pipeline that high-temperature steam or flue gas working medium are carried in underground or ground, only be difficult to adapt to the technical requirements of its insulation, and under higher temperature conditions, the easy collapse-deformation of polyurethane foam layer influences heat insulation effect by the polyurethane foam layer.Pipeline for surpassing the polyurethane ignition temperature then causes the burning of polyurethane easily, thereby destroys its thermal insulation layer, causes thermal insulation layer to damage.
Up to the present, also both not high temperature resistant, the material of the thermal insulation layer of good heat insulating and method of construction are come out again.Along with the appearance of high-tech development and particular facility, how making technology not only high temperature resistant but also that be convenient to heat preservation construction is the problem that needs innovation.
According to retrieval, a kind of thermal insulator and manufacture method thereof are arranged, and its technology contents is: the raw material of a, slip is formed: get 20 parts of rock wools, 65 parts of sepiolites, 2 parts of polyvinyl alcohol, 1.5 parts of rare earth composite adhesives and 20 parts of bentonite clays and hollow ceramic powder 20% and porous ceramics particulate 80% mixture 1.5m by weight
3Mix.
The preparation section of b, slip: polyvinyl alcohol, rare earth composite adhesive are mixed with bentonite clay, add and stir the slurry that becomes pulpous state in the hot water, rock wool, sepiolite and hollow ceramic powder and porous ceramics particulate are together joined in the slurry, mix, water is in harmonious proportion becomes pasty state.
The manufacturing of c, thermal insulator: on the object of needs insulation, lay one deck layer of fibers, on layer of fibers, apply slip, on slip, lay layer of fibers again, constitute one deck thermal insulator, as required, can successively lay and apply, constitute the thermal insulator of different-thickness.
The combination and the method for construction of thermal insulating material have been announced in the technical documentation of this invention, and have the advantage of good anti-aging, shock resistance, high temperature resistant and high thermal insulation, can be widely used in boiler, kiln, heat exchanger, cold and hot pipeline, air-conditioning, freezer etc. needs in the thermal environment.
Analyze the composition in its insulation slip, main body is made up of the inorganic sepiolite with heat-shielding performance and hollow ceramic powder and porous ceramics particulate, Bond polyvinyl alcohol, bentonite clay and rare-earth bound agent have been added in addition, use rock wool and sepiolite as plasticizer simultaneously, disperseing under the effect of water becomes pulpous state, becomes thermal insulator after the drying.
Though this material has good heat preservation performance, resistant to elevated temperatures excellent properties,, for the pipeline parcel, difficulty of construction is big, and is loaded down with trivial details, is not suitable for especially and the compound use of polyurethane.
Summary of the invention
For can be with inorganic high-temperature resistant thermal insulation layer and polyurethane insulation coating combination, reach construction easily and fast, and can resistant to elevated temperatures technical requirements, the present invention proposes a kind of high-temperature resistant composite thermal insulating tube and manufacture method.This thermal insulation pipe is by laying the inorganic high-temperature resistant thermal insulation layer in the outside of tube wall, and filled with polyurethane foam thermal insulation layer between the outside of inorganic high-temperature resistant thermal insulation layer and gum cover then solves high temperature resistant, the good heat insulating of thermal insulation pipe and is convenient to the technical problem of mechanical execution.
The scheme that technical solution problem of the present invention is adopted is:
1, high-temperature resistant composite thermal insulating tube structure
The tube wall outside at the tube chamber of steel pipe is provided with inorganic high-temperature resistant thermal insulation layer, polyurethane insulation coating and gum cover successively.
2, the manufacturing step of high-temperature resistant composite thermal insulating tube
(1), inorganic high-temperature resistant insulation mud constitutes: add the bentonite clay of 5-15 kilogram in 100 kilograms of expanded perlite granules are done, and then add water 20-50 kilogram, stirring becomes inorganic high-temperature resistant insulation mud.
(2), inorganic high-temperature resistant insulation sheet material is made: sew up on four sides with glass fiber cloth and make cloth bag isometric with steel pipe and that the outer diameter of steel pipes girth equates, inorganic high-temperature resistant is incubated mud evenly to be encased in the cloth bag, between all thick roller compactor of two rollers, roll all thickly, become inorganic high-temperature resistant insulation sheet material.
(3), the inorganic high-temperature resistant thermal insulation layer coats: inorganic high-temperature resistant is incubated sheet material prolongs outer wall of steel pipe and wrap up, the both sides seam overlaps mutually, forms the inorganic high-temperature resistant thermal insulation layer.
(4), inorganic high-temperature resistant thermal insulation layer oven dry: in the steel pipe tube chamber,,, make the water evaporation in the inorganic high-temperature resistant thermal insulation layer, form the inorganic high-temperature resistant thermal insulation layer of dry state to heating in the steel pipe tube chamber by hot air and electric heating, gas pyrogen part.
(5), the filling of polyurethane insulation coating: on the filling frame, gum cover is enclosed within the outside of inorganic high-temperature resistant thermal insulation layer, filled with polyurethane foam foam material in the gap between gum cover and inorganic high-temperature resistant thermal insulation layer, in the gap, foam and curing by it, bonding between gum cover and the inorganic high-temperature resistant thermal insulation layer is become whole thermal insulation pipe.
Good effect, owing to lay the inorganic high-temperature resistant thermal insulation layer in the outside of tube wall, and, can realize the problem that pipeline is high temperature resistant and be convenient to mechanical rapid construction at its outside filled with polyurethane foam thermal insulation layer.Have construction easily, quick, be convenient to mechanization, made pipeline heat insulation layer has resistance and high temperature resistance property.Suit to lay thermal insulation layer, use in the production of making high-temperature resistant composite thermal insulating tube and the construction in the high temperature conduit outside.
Description of drawings
Fig. 1 is the horizontal section cross-sectional schematic of high-temperature-resistant thermal-insulation pipe of the present invention
Fig. 2 is a high-temperature-resistant thermal-insulation pipe inorganic insulating layer laying method schematic representation of the present invention
Fig. 3 is a high-temperature-resistant thermal-insulation pipe filled with polyurethane foam foaming layer schematic representation of the present invention
Fig. 4 is the whole cross-section cutaway view of high-temperature-resistant thermal-insulation pipe crosscut of the present invention
Among the figure, 1. steel pipe, 1.1. tube chamber, 2. inorganic high-temperature resistant thermal insulation layer, 2.1. seam, 3. polyurethane insulation coating, 4. gum cover.
Embodiment
1, high-temperature resistant composite thermal insulating tube structure
The tube wall outside at the tube chamber 1.1 of steel pipe 1 is provided with inorganic high-temperature resistant thermal insulation layer 2, polyurethane insulation coating 3 and gum cover 4 successively.Described inorganic high-temperature resistant thermal insulation layer is the tablet that is made of for the adhesive bond expanded perlite granule with the bentonite clay filling in the glass fibre cloth bag.
2, the manufacturing step of high-temperature resistant composite thermal insulating tube
(1), inorganic high-temperature resistant insulation mud constitutes: add the bentonite clay of 5-15 kilogram in 100 kilograms of expanded perlite granules, and then add water 20-50 kilogram, stirring becomes inorganic high-temperature resistant insulation mud.
(2), inorganic high-temperature resistant insulation sheet material is made: sew up on four sides with glass fiber cloth and make cloth bag isometric with steel pipe and that the outer diameter of steel pipes girth equates, inorganic high-temperature resistant is incubated mud evenly to be encased in the cloth bag, between all thick roller compactor of two rollers, roll all thickly, become inorganic high-temperature resistant insulation sheet material.
(3), the inorganic high-temperature resistant thermal insulation layer coats: inorganic high-temperature resistant is incubated sheet material prolongs outer wall of steel pipe and wrap up, both sides seam 2.1 overlap mutually, formation inorganic high-temperature resistant thermal insulation layer.
(4), inorganic high-temperature resistant thermal insulation layer oven dry: in the steel pipe tube chamber, pass through hot blast or hot air and electric heating, gas pyrogen part,, make the water evaporation in the inorganic high-temperature resistant thermal insulation layer, form the inorganic high-temperature resistant thermal insulation layer of dry state to heating in the steel pipe tube chamber.
(5), the filling of polyurethane insulation coating: on the filling frame, gum cover is enclosed within the outside of inorganic high-temperature resistant thermal insulation layer, filled with polyurethane foam foam material in the gap between gum cover and inorganic high-temperature resistant thermal insulation layer, in the gap, foam and curing by it, bonding between gum cover and the inorganic high-temperature resistant thermal insulation layer is become whole thermal insulation pipe.
The inorganic high-temperature resistant insulation layer thickness is at the 10-100 millimeter.
The advantage of high-temperature resistant composite thermal insulating tube of the present invention
1, owing to the inorganic high-temperature resistant heat-insulation layer consists of by the inorganic ore particles of process high temperature Pengization with through the glass fabric of high-temperature fusion is compound, and thermal conductivity factor is low, so, has resistance to elevated temperatures, generally, can under the condition of high temperature about 500 ℃, use for a long time, realize to carry the high temperature material in the steel pipe.
2, owing to expanded perlite, bentonite and glass fabric low cost of manufacture, wide material sources, material is easy to get, so made inorganic high-temperature resistant heat-insulation layer cost is low, is easy to produce.
3, because expanded perlite granule and bentonite are made mud, and be encased in the cloth bag of being made by glass fabric, the manufacture craft process is simple, realizes that easily speed of production is fast, also is convenient to produce.
4, since polyurethane insulation coating be filled in the gap by gum cover and inorganic high-temperature resistant heat-insulation layer, realized the second heat-insulation layer, take full advantage of the resistance to elevated temperatures of inorganic high-temperature resistant insulation material, also utilized the polyurethane insulation coating heat-insulating property good simultaneously, be convenient to the characteristics that filling forms globality.
Because high-temperature resistant composite thermal insulating tube of the present invention has as above comprehensive excellent properties, so, can use at the resistant to elevated temperatures steel pipe of needs, and, antidetonation, thermal shock resistance are improved, the bulk strength height, application surface can enlarge, and adapts to the energy-conservation application use higher with environmental requirement. Such as, high temperature steam pipeline, high temeperature chemistry material pipeline, burning combustion flame tube road etc.
Through actual test, when anti-temperature value reaches 550 ℃, thermal conductivity factor reaches 0.12. When vapor (steam) temperature in the pipeline reached 508 ℃, the temperature of insulating tube outside gum cover was 33 ℃. And polyurethane insulation coating does not have coking, subsides and other obvious denaturalization phenomenon generation, remains intact as before.
Claims (2)
1. high-temperature resistant composite thermal insulating tube is characterized in that: the tube wall outside at the tube chamber (1.1) of steel pipe (1) is provided with inorganic high-temperature resistant thermal insulation layer (2), polyurethane insulation coating (3) and gum cover (4) successively;
Described inorganic high-temperature resistant thermal insulation layer is the tablet that is made of for the adhesive bond expanded perlite granule with the bentonite clay filling in the glass fibre cloth bag.
2. the manufacture method of a high-temperature resistant composite thermal insulating tube is characterized in that:
(1), inorganic high-temperature resistant insulation mud constitutes: add the bentonite clay of 5-15 kilogram in 100 kilograms of expanded perlite granules are done, and then add water 20-50 kilogram, stirring becomes inorganic high-temperature resistant insulation mud;
(2), inorganic high-temperature resistant insulation sheet material is made: sew up on four sides with glass fiber cloth and make cloth bag isometric with steel pipe and that the outer diameter of steel pipes girth equates, inorganic high-temperature resistant is incubated mud evenly to be encased in the cloth bag, between all thick roller compactor of two rollers, roll all thickly, become inorganic high-temperature resistant insulation sheet material;
(3), the inorganic high-temperature resistant thermal insulation layer coats: inorganic high-temperature resistant is incubated sheet material prolongs outer wall of steel pipe and wrap up, both sides seam (2.1) is overlap joint mutually, forms the inorganic high-temperature resistant thermal insulation layer;
(4), inorganic high-temperature resistant thermal insulation layer oven dry: in the steel pipe tube chamber,,, make the water evaporation in the inorganic high-temperature resistant thermal insulation layer, form the inorganic high-temperature resistant thermal insulation layer of dry state to heating in the steel pipe tube chamber by hot air and electric heating, gas pyrogen part;
(5), the filling of polyurethane insulation coating: on the filling frame, gum cover is enclosed within the outside of inorganic high-temperature resistant thermal insulation layer, filled with polyurethane foam foam material in the gap between gum cover and inorganic high-temperature resistant thermal insulation layer, in the gap, foam and curing by it, bonding between gum cover and the inorganic high-temperature resistant thermal insulation layer is become whole thermal insulation pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101594583A CN101818835B (en) | 2010-04-29 | 2010-04-29 | High-temperature resistant composite thermal insulating tube and manufacturing method thereof |
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| CN2010101594583A CN101818835B (en) | 2010-04-29 | 2010-04-29 | High-temperature resistant composite thermal insulating tube and manufacturing method thereof |
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| CN101818835A true CN101818835A (en) | 2010-09-01 |
| CN101818835B CN101818835B (en) | 2012-08-08 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748541A (en) * | 2012-06-25 | 2012-10-24 | 江苏京元节能环保有限公司 | Polyethylene (PE)-sheathed polyurethane (PU) heat-insulation steel pipe for coal-mine downholes |
| CN103062515A (en) * | 2012-10-23 | 2013-04-24 | 杭州新世纪电力器材有限公司 | Nonmetal water supply and drainage composite pipe using ceramsite sand as material of middle enhancement layer |
| CN103075609A (en) * | 2012-12-17 | 2013-05-01 | 天津英康科技发展有限公司 | Hydrophobic enhanced high-temperature non-corrosive heat-insulated pipe case and preparation method thereof |
| CN103600500A (en) * | 2013-10-31 | 2014-02-26 | 徐建昇 | Preparation method of hollow fiber tube |
| CN104295858A (en) * | 2013-07-15 | 2015-01-21 | 慈溪市飞龙电器有限公司 | Thermal insulating layer structure for refrigerator and freezer |
| CN105156768A (en) * | 2015-09-07 | 2015-12-16 | 唐山丰南君业节能保温材料有限公司 | Prefabricated overhead steam heat preservation pipeline and production technology |
| CN108548017A (en) * | 2018-05-30 | 2018-09-18 | 联塑市政管道（河北）有限公司 | A kind of compound insulating tube |
| CN109027526A (en) * | 2018-09-13 | 2018-12-18 | 山东艾菲尔管业有限公司 | Central heating prefabricated thermal insulation plastic conduit |
| CN109531908A (en) * | 2018-10-30 | 2019-03-29 | 中投（天津）热力股份有限公司 | A kind of glass fibre reinforced plastics casing insulating tube production technology |
| CN110030439A (en) * | 2019-05-27 | 2019-07-19 | 中裕软管科技股份有限公司 | A kind of novel heat insulation and preservation hose and its production method |
| CN110130365A (en) * | 2018-02-02 | 2019-08-16 | 上海清远管业科技股份有限公司 | A kind of backfill component for plastic pipe rapid construction |
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Patent Citations (4)
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| CN2043699U (en) * | 1988-09-29 | 1989-08-30 | 青岛崂山钢管防腐保温厂 | Insulation corrosion-preventing composite tube |
| CN2096687U (en) * | 1991-02-10 | 1992-02-19 | 王晓东 | Polyurethane and pearlite compound thermal insulating cellpacking |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748541A (en) * | 2012-06-25 | 2012-10-24 | 江苏京元节能环保有限公司 | Polyethylene (PE)-sheathed polyurethane (PU) heat-insulation steel pipe for coal-mine downholes |
| CN103062515A (en) * | 2012-10-23 | 2013-04-24 | 杭州新世纪电力器材有限公司 | Nonmetal water supply and drainage composite pipe using ceramsite sand as material of middle enhancement layer |
| CN103062515B (en) * | 2012-10-23 | 2015-03-11 | 杭州新世纪电力器材有限公司 | Nonmetal water supply and drainage composite pipe using ceramsite sand as material of middle enhancement layer |
| CN103075609B (en) * | 2012-12-17 | 2015-04-08 | 天津英康科技股份有限公司 | Hydrophobic enhanced high-temperature non-corrosive heat-insulated pipe case and preparation method thereof |
| CN103075609A (en) * | 2012-12-17 | 2013-05-01 | 天津英康科技发展有限公司 | Hydrophobic enhanced high-temperature non-corrosive heat-insulated pipe case and preparation method thereof |
| CN104295858A (en) * | 2013-07-15 | 2015-01-21 | 慈溪市飞龙电器有限公司 | Thermal insulating layer structure for refrigerator and freezer |
| CN103600500A (en) * | 2013-10-31 | 2014-02-26 | 徐建昇 | Preparation method of hollow fiber tube |
| CN103600500B (en) * | 2013-10-31 | 2016-04-06 | 徐建昇 | Preparation method of hollow fiber tube |
| CN105156768A (en) * | 2015-09-07 | 2015-12-16 | 唐山丰南君业节能保温材料有限公司 | Prefabricated overhead steam heat preservation pipeline and production technology |
| CN110130365A (en) * | 2018-02-02 | 2019-08-16 | 上海清远管业科技股份有限公司 | A kind of backfill component for plastic pipe rapid construction |
| CN108548017A (en) * | 2018-05-30 | 2018-09-18 | 联塑市政管道（河北）有限公司 | A kind of compound insulating tube |
| CN109027526A (en) * | 2018-09-13 | 2018-12-18 | 山东艾菲尔管业有限公司 | Central heating prefabricated thermal insulation plastic conduit |
| CN109531908A (en) * | 2018-10-30 | 2019-03-29 | 中投（天津）热力股份有限公司 | A kind of glass fibre reinforced plastics casing insulating tube production technology |
| CN110030439A (en) * | 2019-05-27 | 2019-07-19 | 中裕软管科技股份有限公司 | A kind of novel heat insulation and preservation hose and its production method |
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| CN101818835B (en) | 2012-08-08 |
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