CN104760343A - Composite pipe made of different-expansion-coefficient materials - Google Patents
Composite pipe made of different-expansion-coefficient materials Download PDFInfo
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- CN104760343A CN104760343A CN201510220872.3A CN201510220872A CN104760343A CN 104760343 A CN104760343 A CN 104760343A CN 201510220872 A CN201510220872 A CN 201510220872A CN 104760343 A CN104760343 A CN 104760343A
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Abstract
The invention discloses a composite pipe made of different-expansion-coefficient materials. The composite pipe is composed of an outer layer pipe body and an inner layer pipe body, wherein the expansion coefficient of the outer layer pipe body is different from that of the inner layer pipe body, and the outer layer pipe body and the inner layer pipe body are fixed in an adhesive mode through at least one layer of adhesive layer; the expansion coefficient of the adhesive layer is between the expansion coefficient of the outer layer metal pipe body and the expansion coefficient of the inner layer pipe body. Compared with the prior art, due to the fact that the outer layer pipe body and the inner layer pipe body which have different expansion coefficients are composited in the adhesive mode through the adhesive layer, the expansion coefficients of the pipe layers change in a gradient mode, thermal stress generated because of different thermal expansion coefficients of the inner layer pipe body and the outer layer pipe body is resisted, many problems such as deformation, breakage and leakage caused by desynchrony of expansion and contraction of the inner layer pipe body and the outer layer pipe body of the composite metal pipe can be effectively solved, and the composite pipe has the advantages of being simple in structure, resistant to corrosion and temperature change, high in strength, good in tenacity, low in comprehensive total price and long in service life.
Description
Technical field
Of the present inventionly relate to technical field of composite materials, the particularly compound tubing of different expansion material.
Background technology
Tubing is widely used in engineering material, but the shortcoming such as metal exists wearability and corrosion resistance is poor, be difficult to meet the further demand of modern production technology to material combination property.Especially in chemical medium conveying and oilfield exploitation course of conveying, the burn into wearing and tearing of metal pipe material, slagging scorification are its three large public hazards, all the time along with whole process.
Glass, pottery have many advantages compared with other tubing, the many advantages such as have decay resistance, smooth surface, conveying energy consumption is low, long service life, comprehensive cost are low.But many shortcoming and defect are exposed in its Long-Time Service and project installation process: 1, elastic modelling quantity and rigidity are all poor; 2, impact resistance is poor, easily occurs fracture, breakoff phenomenon in transport, installation process; 3, hardness is less, often occurs that pipeline top is split when mounted, and even top is worn, and causes pipe leakage, by these shortcoming and defect, greatly limit its range of application.
The materials such as glass, pottery, resin, carbon fiber are different from the thermal coefficient of expansion of metal material, metal pipe material glass inner-lining or ceramic tubing, because the thermal coefficient of expansion of inside and outside layer tubing is different, when wide temperature range works, the problems such as distortion, fracture, seepage will inevitably be produced due to expand with heat and contract with cold asynchronous, therefore, the tubing of different materials how is made effectively to be combined with the metal pipe material of outsourcing, resisting the thermal stress produced because thermal coefficient of expansion is different, is that composite metal pipe technology can the key of successful Application.
Summary of the invention
The present invention is directed to glass, pottery or carbon fiber and the inconsistent problem of metal tube expansion character, the compound tubing of different expansion material is provided, corrosion resistant, wear-resisting, the seepage caused because expanding with heat and contract with cold can be avoided.
The technical solution used in the present invention is as follows:
The compound tubing of different expansion material, be made up of outer tube and inner tube, outer tube is different from the coefficient of expansion of inner tube material, and the adhesive layer by least one deck between described outer tube and described inner tube is adhesively fixed; The coefficient of expansion of described adhesive layer is between outer layer metal tube and the coefficient of expansion of inner tube.
Adhesive layer of the present invention is primarily of material, the material of inner tube, the curing agent composition of epoxy resin, outer tube, the thickness of adhesive layer and internal structure can regulate according to actual condition, mainly be subject to the material of temperature and inside and outside layer pipe different and change, the corresponding material adding different content according to coefficient of expansion difference regulates.
Preferably, described adhesive layer forms primarily of epoxy resin, outer material, internal layer material and curing agent.
Preferably, the diameter 0.03m-1.6m of described compound tubing, length 1m-20m.
Preferably, the wall thickness 0.1mm ~ 10mm of described outer tube, described bonding thickness 0.01mm ~ 10mm, the wall thickness 0.01mm ~ 10mm of inner tube.
Preferably, described outer tube, inner tube are metal tube, glass tube, pitch tube, carbon fiber pipe or earthenware.
Selecting of above-mentioned inner tube material is that performance according to its operating mode character and material itself determines.As glass has the performance of low thermal expansion, high temperature resistant, high strength, high rigidity and high chemical stability, can be applicable in the high-pressure machinery equipment such as petrochemical industry, medicine, power plant, boiler factory, pressure vessel; Carbon fiber has high temperature resistant, wear-resistant, conduction, heat conduction and the performance such as corrosion-resistant, and its profile has significant anisotropy, softness, can be paved with whole container inner wall during application, is applicable to high temperature, the workplace that chemical stability requirements is high; Pottery at high temperature has fabulous stability, to acid, alkali, salt, there is good resistance to corrosion, and the heat conductivility of pottery is lower than metal material, pottery also has good effect of heat insulation, can be used for high temperature, the high pressure operating modes such as petrochemical industry, medicine, power plant, boiler factory, pressure vessel.
Preferably, described metal tube is iron pipe, steel pipe, aluminum pipe or copper pipe.
Preferably, described adhesive layer be two-layer more than, outer tube, adhesive layer, the inner tube of described compound tubing, every layer of coefficient of expansion of ecto-entad changes in gradient.
The present invention establishes adhesive layer between the different outer tube of the coefficient of expansion and inner tube, and the coefficient of expansion of adhesive layer is between metal and the coefficient of expansion of inner tube tubing; Or multilayer is set there is the adhesive layer that the coefficient of expansion changes in gradient, make the unlikely breakage or come off when variations in temperature and intraductal pressure change of the material of adhesive layer both sides.Comparatively prior art is compared, outer tube different for the coefficient of expansion and inner tube are bonded together by adhesive layer by the present invention securely, realize the coefficient of expansion between tube layer and change change in gradient, in opposing, the thermal stress that outer tube produces because thermal coefficient of expansion is different, can effectively solve in composite metal pipe, outer tube produces distortion due to expand with heat and contract with cold asynchronous, fracture, the problems such as seepage, glass and pottery are the existing anti-corrosion material more easily obtained, and carbon fiber can better be combined with adhesive layer due to its pore structure, play the effect of sealing, there is structure simple, corrosion resistant, temp. variation resistant, intensity and toughness good, comprehensive total price is low, the advantage of long service life.
Accompanying drawing explanation
Accompanying drawing 1 width of the present invention, in figure, 1 outer tube; 2 inner tube; 3 adhesive layers.
Detailed description of the invention
Following non-limiting example can make the present invention of those of ordinary skill in the art's comprehend, but does not limit the present invention in any way.
The compound tubing of the different expansion material of embodiment 1
As shown in Figure 1, compound tubing, is made up of outer iron pipe 1 and inner layer glass tube 2, is adhesively fixed by one deck adhesive layer 3; The coefficient of expansion of adhesive layer 3 is between iron and the coefficient of expansion of glass; Adhesive layer 3 composition by weight percentage, primarily of the glass dust of the epoxy resin of 40%-55%, 25%-35% iron powder, 10%-25% and the curing agent composition of 5%-10%.The diameter 0.03m-1.6m of tubing, length 1m-20m; Wall thickness 0.1mm ~ the 10mm of iron pipe 1, the thick 0.01mm ~ 10mm of adhesive layer 3, the wall thickness 0.01mm ~ 10mm of glass tube 2.
The compound tubing of the present embodiment, closes glass tube at iron pipe viscous, enhances the rotproofness of iron pipe, and by change that the coefficient of expansion between tube layer is changed in gradient, effectively improve the impermeability of compound tubing, overall performance is better than stainless steel, has again the cost advantage that comprehensive cost is low.The glass tube of internal layer, particularly aluminosilicate glass, high-boron-silicon glass, it is the specific glass material of low thermal expansion, high temperature resistant, high strength, high rigidity and high chemical stability, because of the performance of its excellence, be widely used in the high-pressure machinery equipment such as iron and steel, metallurgy, petrochemical industry, medicine, power plant, boiler factory, pressure vessel.
The compound tubing of the different expansion material of embodiment 2
As shown in Figure 1, compound tubing, is made up of outer carbon steel pipe 1 and inner layer glass tube 2, is adhesively fixed by one deck adhesive layer 3; The coefficient of expansion of adhesive layer 3 is between the coefficient of expansion of carbon Steel and Glass; Adhesive layer 3 composition by weight percentage, primarily of the glass dust of the epoxy resin of 40%-55%, 25%-35% carbon steel powder, 10%-25% and the curing agent composition of 5%-10%.The diameter 0.03m-1.6m of tubing, length 1m-20m; Wall thickness 0.1mm ~ the 10mm of carbon steel pipe 1, the thick 0.01mm ~ 10mm of adhesive layer 3, the wall thickness 0.01mm ~ 10mm of glass tube 2.
The compound tubing of the present embodiment, closes glass tube at carbon steel pipe viscous, enhances the rotproofness of carbon steel pipe, and by change that the coefficient of expansion between tube layer is changed in gradient, effectively improve the impermeability of compound tubing, overall performance is better than stainless steel, has again the cost advantage that comprehensive cost is low.The glass tube of internal layer, particularly aluminosilicate glass, high-boron-silicon glass, it is the specific glass material of low thermal expansion, high temperature resistant, high strength, high rigidity and high chemical stability, because of the performance of its excellence, be widely used in the high-pressure machinery equipment such as iron and steel, metallurgy, petrochemical industry, medicine, power plant, boiler factory, pressure vessel.
The compound tubing of the different expansion material of embodiment 3
Composite metal pipe, is made up of internal layer earthenware 2 and outer iron pipe 1, is adhesively fixed by two-layer adhesive layer, the diameter 0.03m-1.6m of tubing, length 1m-20m; Wall thickness 0.1mm ~ the 10mm of iron pipe 1, every layer of thick 0.01mm ~ 10mm of adhesive layer 3, the wall thickness 0.01mm ~ 10mm of earthenware 2.
The coefficient of expansion of adhesive layer is between pottery and the coefficient of expansion of iron, two-layer adhesive layer from inside to outside, be respectively adhesive layer I and adhesive layer II: the composition of adhesive layer I by weight percentage, the ceramic powder primarily of 25%, 25% iron powder, 40% epoxy and 10% curing agent composition.The composition of adhesive layer II by weight percentage, the ceramic powder primarily of 10%, 35% iron powder, 50% epoxy and 5% curing agent composition.
The compound tubing of the present embodiment, at iron pipe inside bonding earthenware, enhances the rotproofness of iron pipe, and by change that the coefficient of expansion between tube layer is changed in gradient, effectively improve the impermeability of compound tubing, overall performance is better than stainless steel, has again the cost advantage that comprehensive cost is low.The earthenware of internal layer at high temperature has fabulous stability to have good resistance to corrosion to acid, alkali, salt; The thermal conductivity of pottery is lower than metal material, and ceramic or good heat-barrier material, can be applicable to high temperature, the pressure pipings such as petrochemical industry, medicine, power plant, boiler factory, pressure vessel.
Claims (7)
1. the compound tubing of different expansion material, be made up of outer tube (1) and inner tube (2), outer tube (1) is different from the coefficient of expansion of inner tube (2) material, it is characterized in that:
The adhesive layer (3) passing through at least one deck between described outer tube (1) and described inner tube (2) is adhesively fixed;
The coefficient of expansion of described adhesive layer (3) is between outer layer metal tube and the coefficient of expansion of inner tube.
2. the compound tubing of different expansion material according to claim 1, is characterized in that: the diameter 0.03m-1.6m of described compound tubing, length 1m-20m.
3. the compound tubing of different expansion material according to claim 2, it is characterized in that: the wall thickness 0.1mm ~ 10mm of described outer tube (1), described adhesive layer (3) thick 0.01mm ~ 10mm, the wall thickness 0.01mm ~ 10mm of inner tube (2).
4. the compound tubing of different expansion material according to claim 1, is characterized in that:
Described outer tube (1), inner tube (2) are metal tube, glass tube, pitch tube, carbon fiber pipe or earthenware.
5. the compound tubing of different expansion material according to claim 4, is characterized in that: described metal tube is iron pipe, steel pipe, aluminum pipe or copper pipe.
6. composite metal pipe according to claim 1, it is characterized in that: described adhesive layer (3) is for more than two-layer, the outer tube (1) of described compound tubing, adhesive layer (3), inner tube (2), every layer of coefficient of expansion of ecto-entad changes in gradient.
7. composite metal pipe according to claim 1, is characterized in that: described adhesive layer forms primarily of the material of epoxy resin, outer tube, the material of inner tube and curing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510220872.3A CN104760343A (en) | 2015-04-30 | 2015-04-30 | Composite pipe made of different-expansion-coefficient materials |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510220872.3A CN104760343A (en) | 2015-04-30 | 2015-04-30 | Composite pipe made of different-expansion-coefficient materials |
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| CN104760343A true CN104760343A (en) | 2015-07-08 |
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| CN201510220872.3A Pending CN104760343A (en) | 2015-04-30 | 2015-04-30 | Composite pipe made of different-expansion-coefficient materials |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109766624A (en) * | 2019-01-04 | 2019-05-17 | 北京航空航天大学 | A kind of prediction technique of cementing structure adhesive layer fatigue life under the conditions of high/low temperature cold cycling |
| JP7409867B2 (en) | 2019-12-26 | 2024-01-09 | 株式会社前川製作所 | Bimetal piping, insulation piping and refrigeration systems |
-
2015
- 2015-04-30 CN CN201510220872.3A patent/CN104760343A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109766624A (en) * | 2019-01-04 | 2019-05-17 | 北京航空航天大学 | A kind of prediction technique of cementing structure adhesive layer fatigue life under the conditions of high/low temperature cold cycling |
| JP7409867B2 (en) | 2019-12-26 | 2024-01-09 | 株式会社前川製作所 | Bimetal piping, insulation piping and refrigeration systems |
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Application publication date: 20150708 |
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