CN1078940A - Compound Thermal insulation articles and heat-insulating method - Google Patents
Compound Thermal insulation articles and heat-insulating method Download PDFInfo
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- CN1078940A CN1078940A CN 93100994 CN93100994A CN1078940A CN 1078940 A CN1078940 A CN 1078940A CN 93100994 CN93100994 CN 93100994 CN 93100994 A CN93100994 A CN 93100994A CN 1078940 A CN1078940 A CN 1078940A
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Abstract
The invention discloses a kind of compound Thermal insulation articles and heat-insulating method that the high temperature warmed body is incubated of being suitable for.These goods comprise the inner thermal insulating layer that one deck is at least formed by rock wool, composite magnesium silicate or alumina silicate fibre, be positioned at the external thermal insulation that is formed by polyurethane rigid foam plastic away from that side of warmed body with one deck, the thickness of inner thermal insulating layer should be able to make the temperature of warmed body be reduced to about 60 ℃.This method is to form described inner thermal insulating layer earlier on warmed body, and the method with foam-in-place forms described external thermal insulation then.Described goods bear high temperature by inner thermal insulating layer, reach good heat preservation effect by external thermal insulation.It is long and be difficult for making the advantage of metal warmed body oxidation to have high insulating effect, good waterproof performance, life-span.
Description
The present invention relates to a kind of Thermal insulation articles and heat-insulating method, relate in particular to a kind of compound Thermal insulation articles and heat-insulating method that is suitable for the high temperature warmed body is carried out heat-insulation and heat-preservation.
Need carry out heat-insulation and heat-preservation for thermal capacitance device, heating power feed-line, to reduce its radiation loss.The general material that adopts of traditional heat-insulation and heat-preservation is rock wool, perlite, alumina silicate fibre and composite magnesium silicate or the like.Material such as rock wool, perlite can be made into flat board or watt shape product.The advantage that these materials had is that they can bear high temperature.But its shortcoming is that their thermal conductivity factor is higher, when the warmed body temperature is higher, needs quite thick heat-insulation layer.The water resistance of these materials is relatively poor.In addition, the service life of these materials is lower, generally only is 3-5.
Polyurethane rigid foam plastic has good heat-proof quality, and its thermal conductivity factor is very little, and does not absorb water, and moisture resistance is good.Simultaneously, this material can on-the-spot integral foam, is shaped with the shape of warmed body, and no seam makes the warmed body can be substantially and air insulation.The shortcoming that this material has is its non-refractory, and is just aging when temperature surpasses 100 ℃, even burns.Therefore, polyurethane rigid foam plastic is only applicable to low temperature insulation (freezer, cold pipe etc.), and also successfully uses for many years.Because the shortcoming of polyurethane rigid foam plastic non-refractory, it is not suitable as the heat-insulation and heat-preservation material of high temp objects but obviously.
U.S. Pat 4,324,834 disclose the compound Thermal insulation articles that a kind of polyurethane foam plastics and expanded pearlite petrofacies are compounded to form.This invention makes two kinds of compound purposes of material be to provide a kind of insulation value to reach the Thermal insulation articles of the several times of two kinds of material insulation value sums.But this prior art does not clearly limit the position relation of perlite material layer and polyurethane foam plastics material layer and warmed body, and also the thickness of foot couple expanded pearlite rock stratum limits simultaneously, and these are necessary for soak.For example, according to its Fig. 3 and 4 example illustrated, polyurethane foam layer directly contacts with warmed body, if the temperature of warmed body is higher than 100 ℃, then can make this layer rapidly aging even burn.For Fig. 1 and example that Fig. 2 gives, one deck or two layers of foam layer are sandwiched between the pearl rock stratum, if the thickness of ground floor pearl rock stratum is not enough to cool the temperature under 100 ℃, then also can make froth bed aging even burn.Therefore, these goods may be effectively for the low temperature insulation that is lower than 100 ℃, but it can not or be unsuitable for soak.In addition, this goods outermost layer adopts the pearl rock stratum, and the water resistance of goods is descended.
The object of the invention is to provide a kind of high insulating effect that is specially adapted to the high temperature warmed body, long service life, and the compound Thermal insulation articles of good waterproof performance and a kind of heat-insulating method that the high temperature warmed body well is incubated of being suitable for.
Be used to realize that the compound Thermal insulation articles that the high temperature warmed body is incubated that is applicable to of the object of the invention comprises: the external thermal insulation that one deck is formed by polyurethane rigid foam plastic, at least the inner thermal insulating layer that forms by rock wool, composite magnesium silicate or alumina silicate fibre of one deck, described inner thermal insulating layer is positioned at that side that is adjacent to warmed body, and described external thermal insulation is positioned at that side away from warmed body, and the thickness of described inner thermal insulating layer should be able to make the temperature of described warmed body be reduced to about 60 ℃ behind described inner thermal insulating layer heat-insulation and heat-preservation.
Said high temperature warmed body is meant that generally those temperature are higher than 120 ℃ and be lower than 1200 ℃ warmed body in this specification.
Those skilled in the art can determine its thickness easily according to the coefficient of heat insulation of the material of selected inner thermal insulating layer.For example: for the complex silicate magnesium material, but about 100 ℃ of per 0.8 centimetre thickness heat insulation and heat control.The thickness of inner thermal insulating layer of goods that is not higher than 1200 ℃ warmed body insulation for temperature is usually located between 1-10 centimetre, and it generally is between 1-5 centimetre at 180 ℃-650 ℃ warmed body for temperature.
Described inner thermal insulating layer preferably is made of two-layer, and two-layer can formation by rock wool and composite magnesium silicate respectively perhaps also can be formed by aluminium silicate fiber peacekeeping composite magnesium silicate respectively.
Preferably between 4-6 centimetre, thickness is 5 centimetres of the bests to the thickness of described polyurethane rigid foam plastic external thermal insulation.
Described compound Thermal insulation articles can be prefabricated into flat board or watt shape.
But, be to make it form the monolithic molding goods identical with the warmed body external surface shape for a preferred version of the present invention.Its formation method is: at first form inner thermal insulating layer on the thermal insulator outer surface, the external thermal insulation of the method for using foam-in-place then polyurethane rigid foam plastic on compound on the inner thermal insulating layer outer surface.Such goods do not have seam each other, can be substantially and air insulation.
The method that is suitable for the high temperature warmed body being carried out heat-insulation and heat-preservation that is used to realize the object of the invention comprises the steps:
(1) form the inner thermal insulating layer that one deck at least is made of rock wool, composite magnesium silicate or alumina silicate fibre on the warmed body outer surface, the thickness of formed inner thermal insulating layer should be able to make the temperature of warmed body be reduced to about 60 ℃ behind described inner thermal insulating layer heat-insulation and heat-preservation;
(2) method with foam-in-place forms one deck polyurethane rigid foam plastic external thermal insulation on described inner thermal insulating layer outer surface.
The step that forms described inner thermal insulating layer preferably includes two steps: (1-1) at first form rock wool or alumina silicate fibre layer on the warmed body outer surface; (1-2) on rock wool or alumina silicate fibre layer, be coated with the composite magnesium silicate layer then.
The step that forms the polyurethane rigid foam plastic layer can adopt the method for any known polyurethane foam-in-place, but preferably include following steps: (2-1) form a removable housing in the inner thermal insulating layer outside, has certain distance between housing and the inner thermal insulating layer, this distance equals the thickness of described external thermal insulation, and described inner surface of outer cover scribbles butter; (2-2) make how different sour hydrogen ester and many components glycerin polyether by weight 1: 1 ratio mix and the space between shell and inner thermal insulating layer outer surface in carry out foam-in-place: after (2-3) treating polyurethane rigid foam plastic curing, remove described shell.
The thickness of the inner thermal insulating layer that forms is preferably between 1-10 centimetre, and is better between 1-5 centimetre.
The thickness of the external thermal insulation that forms preferably between 4-6 centimetre, 5 centimetres of the bests.
Compared with the prior art compound Thermal insulation articles of the present invention and heat-insulating method have following advantage: it makes thermal conductivity factor higher but resistant to elevated temperatures by rock wool, minimum but the polyurethane rigid foam plastic external thermal insulation that can not bear high temperature of inner thermal insulating layer that alumina silicate fibre or composite magnesium silicate form and thermal conductivity factor combines, utilize inner thermal insulating layer to bear high temperature, and cool the temperature to about 60 ℃, utilize external thermal insulation to reach good heat insulation and preservation effect then, it works external thermal insulation under optimal temperature conditions, utilized the advantage of two kinds of materials and overcome simultaneously the shortcoming of two kinds of materials.Can reach best heat insulation effect like this.For example, the temperature of outer surface such as existing rock wool surpasses environment temperature more than 10 ℃ usually, and the present invention can make the heat-insulation layer outer surface only be higher than 1.38 ℃ of environment temperatures, has realized heat insulation basically.
Its skin of goods of the present invention is a polyurethane rigid foam plastic, and water resistance is fabulous, can protect metal warmed body (for example pipeline) to make its not oxidation effectively.General insulation material service life is 3-5 only, and goods of the present invention can use 15-20.
The heat insulating products that adopts the foam-in-place monolithic molding to make does not have seam between goods, make it combine firm, the muddy one that is with warmed body, and the insulation of formation and air has further improved its heat insulation effect, and can prevent the oxidation of metal warmed body.
Several specific embodiments of the present invention is described below with reference to accompanying drawings.
Fig. 1 is the cutaway view that has the compound Thermal insulation articles of warmed body of the present invention.
Fig. 2 is the cutaway view along the A-A line of Fig. 1.
Fig. 3 is the cutaway view of the Thermal insulation articles of another embodiment of the present invention, also shows warmed body among the figure.
As illustrated in fig. 1 and 2, compound Thermal insulation articles of the present invention comprises inner thermal insulating layer 2 and external thermal insulation 1, and inner thermal insulating layer 2 inboards are warmed bodies 3.External thermal insulation 1 is in that side away from warmed body 3, and promptly this layer directly contacts with environment facies.In this embodiment, warmed body 3 is that a temperature is about 180 ℃ metal tube.Under this temperature conditions, inner thermal insulating layer 2 can be made of composite magnesium silicate, pasty state complex silicate magnesium material can be coated on the warmed body 3, and its thickness is about 1 centimetre, can make 180 ℃ temperature of metal tube reduce to about 60 ℃ after this layer insulation.External thermal insulation 1 is made of polyurethane rigid foam plastic, and it is compound on the inner thermal insulating layer 2, and the thickness of external thermal insulation 1 is 5 centimetres.Form described external thermal insulation 1 and can adopt following technology: a removable housing (not shown) is installed in inner thermal insulating layer 2 outsides, inner walls is coated with the butter that the demoulding is used, and make inner walls and inner thermal insulating layer 2 outer surfaces at a distance of 5 centimetres, form the space of a sky betwixt; Then how different sour hydrogen ester (MR or LMDT) and many components glycerin polyether (above-mentioned two produce markets are on sale) are made its foaming by weight mixed being incorporated in of 1: 1 ratio in the described space; After treating that foaming finishes and solidifies, remove housing, can form the external thermal insulation 1 of 5 cm thicks.
Under above-mentioned heat-retaining condition, the temperature of external thermal insulation 1 outer surface only exceeds 1.38 ℃ of environment temperatures (environment temperature is 18 ℃), has realized heat insulation basically.
Fig. 3 shows the compound Thermal insulation articles of another kind of the present invention.These goods are made of inner thermal insulating layer 2 and external thermal insulation 1.And inner thermal insulating layer 2 is formed by two-layer, is promptly formed by internal layer 4 and outer 5.Outer 5 outsides are warmed bodies 3.In this embodiment, the temperature of warmed body 3 is 450 ℃.In the case, form the skin 5 of inner thermal insulating layer 2 by rock wool, its thickness is 2 centimetres, and it can make the temperature of warmed body 3 reduce to about 200 ℃, forms its internal layer 4 by composite magnesium silicate, and thickness is 1.5 centimetres, and temperature is further reduced to 50 ℃.External thermal insulation 1 is formed by polyurethane rigid foam plastic, and its thickness is 5 centimetres.At this moment, be under 18 ℃ of conditions in environment temperature, the temperature of article outer surface only is 19.3 ℃.
Claims (10)
1, a kind of compound Thermal insulation articles that the high temperature warmed body is incubated that is applicable to, it comprises the inner thermal insulating layer that one deck is at least formed by rock wool, composite magnesium silicate or alumina silicate fibre, described inner thermal insulating layer is positioned at that side that is adjacent to described warmed body, it is characterized in that: described goods comprise that also one deck is positioned at the external thermal insulation that is formed by polyurethane rigid foam plastic away from that side of warmed body, and the thickness of described inner thermal insulating layer should be able to make the temperature of described warmed body be reduced to about 60 ℃ behind described inner thermal insulating layer heat-insulation and heat-preservation.
2, compound Thermal insulation articles as claimed in claim 1, it is characterized in that: the thickness of described inner thermal insulating layer is between 1-10 centimetre.
3, compound Thermal insulation articles as claimed in claim 2, it is characterized in that: the thickness of described inner thermal insulating layer is between 1-5 centimetre.
4, as claim 1 or 2 or 3 described compound Thermal insulation articles, it is characterized in that: described goods are dull and stereotyped or watt shape, or the monolithic molding goods identical with the warmed body external surface shape.
5, as claim 1 or 2 or 3 described Thermal insulation articles, it is characterized in that: described inner thermal insulating layer two-layerly is made of internal layer and outer this, is two-layerly formed by composite magnesium silicate and rock wool respectively, or is formed by composite magnesium silicate and alumina silicate fibre respectively.
6, a kind of method of the high temperature warmed body being carried out heat-insulation and heat-preservation that is applicable to is characterized in that it comprises the steps:
(1) form the inner thermal insulating layer that one deck at least is made of rock wool, composite magnesium silicate or alumina silicate fibre on the warmed body outer surface, the thickness of formed inner thermal insulating layer should be able to make the temperature of warmed body be reduced to about 60 ℃ behind described inner thermal insulating layer heat-insulation and heat-preservation.
(2) method with foam-in-place forms one deck polyurethane rigid foam plastic external thermal insulation on described inner thermal insulating layer outer surface.
7, heat-insulating method as claimed in claim 6 is characterized in that, the step that forms described inner thermal insulating layer comprises following two steps:
(1-1) at first form rock wool or alumina silicate fibre layer in appearance at warmed body;
(1-2) on rock wool or alumina silicate fibre layer, be coated with the composite magnesium silicate layer then.
As claim 6 or 7 described heat-insulating methods, it is characterized in that 8, the step that forms the polyurethane rigid foam plastic external thermal insulation comprises the steps:
(2-1) form a removable housing in the inner thermal insulating layer outside, have certain distance between housing and the inner thermal insulating layer, this distance equals the thickness of described external thermal insulation, and described shell inner surface scribbles butter;
(2-2) make how different sour hydrogen ester and many components glycerin polyether by weight 1: 1 ratio mix and the space between shell and inner thermal insulating layer outer surface in carry out foam-in-place;
(2-3) treat the polyurethane rigid foam plastic solid after, remove described shell.
9, as claim 6 or 7 described heat-insulating methods, it is characterized in that: the thickness of the inner thermal insulating layer of formation is between 1-10 centimetre, and the thickness of the external thermal insulation of formation is between 4-6 centimetre.
10, heat-insulating method as claimed in claim 9 is characterized in that: the thickness of described inner thermal insulating layer is between 1-5 centimetre, and the thickness of described external thermal insulation is 5 centimetres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93100994 CN1078940A (en) | 1993-02-12 | 1993-02-12 | Compound Thermal insulation articles and heat-insulating method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93100994 CN1078940A (en) | 1993-02-12 | 1993-02-12 | Compound Thermal insulation articles and heat-insulating method |
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| Publication Number | Publication Date |
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| CN1078940A true CN1078940A (en) | 1993-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 93100994 Pending CN1078940A (en) | 1993-02-12 | 1993-02-12 | Compound Thermal insulation articles and heat-insulating method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302223C (en) * | 2004-05-12 | 2007-02-28 | 中国科学院理化技术研究所 | Multiple flexible foamed thermal insulation layer for refrigeration and cryogenic equipment |
| CN103738664A (en) * | 2014-01-02 | 2014-04-23 | 芜湖华烨工业用布有限公司 | Conveyor belt |
| CN109589849A (en) * | 2018-11-19 | 2019-04-09 | 嘉兴市爵拓科技有限公司 | The herbal liquid medicine blender of constant temperature intelligent control |
-
1993
- 1993-02-12 CN CN 93100994 patent/CN1078940A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302223C (en) * | 2004-05-12 | 2007-02-28 | 中国科学院理化技术研究所 | Multiple flexible foamed thermal insulation layer for refrigeration and cryogenic equipment |
| CN103738664A (en) * | 2014-01-02 | 2014-04-23 | 芜湖华烨工业用布有限公司 | Conveyor belt |
| CN103738664B (en) * | 2014-01-02 | 2016-07-06 | 芜湖华烨工业用布有限公司 | A kind of conveyer belt |
| CN109589849A (en) * | 2018-11-19 | 2019-04-09 | 嘉兴市爵拓科技有限公司 | The herbal liquid medicine blender of constant temperature intelligent control |
| CN109589849B (en) * | 2018-11-19 | 2021-08-10 | 刘辉 | Constant temperature intelligent control's chinese herbal medicine liquid medicine mixer |
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Addressee: Zhao Baosen Document name: Sight note |