CN1654877A - Steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system - Google Patents
Steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system Download PDFInfo
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- CN1654877A CN1654877A CN 200510054627 CN200510054627A CN1654877A CN 1654877 A CN1654877 A CN 1654877A CN 200510054627 CN200510054627 CN 200510054627 CN 200510054627 A CN200510054627 A CN 200510054627A CN 1654877 A CN1654877 A CN 1654877A
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Abstract
This invention relates to high temperature steel cover direct-buried preservation insulation system composed of insulation tube, three-way, bent head, fixing racket, compensator, drainage channel and drainage tube. The invention is characterized by orderly comprising inner steel tube, high temperature adhesive agent layer, silicate high temperature fiber felt resistance-reducing layer, silicate insulation layer, organic high temperature hard urethane foam insulation layer, spiral welding protective steel tube, epoxy powder coating layer of six to eight micrometer, adhesive agent layer of 170 to 250 micrometer and the high density polythene protective layer of three to five millimeter. It also fills hydrophobic litaflex between insulation gaps.
Description
Technical field
The utility model relates to the direct-burried heat-insulation system, particularly a kind of steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system that is used for underground conveying hyperthermia and superheating steam.
Background technique
The city heat supply pipeline adopts the direct-burried paving mode more at present; it is underground to be that heat supply pipeline directly is embedded in; the structure of existing heat supply pipeline is generally: innermost layer is a metallic conduit; metallic conduit is provided with thermal insulation layer outward; it is two-layer that thermal insulation layer mostly is: inner thermal insulating layer forms for the insulation tile fragment fastens; external thermal insulation is a polyurethane rigid foam plastic, and outermost surface is the plastic tube protective layer of PVC material.Has following shortcoming; owing between the insulation tile fragment many seams are arranged; when superheated vapor when the steel pipe, by the insulation tile block of material characteristic determined, micro-shrinkage phenomenon can take place in the insulation tile fragment; causing one by one, joint gap strengthens; heat in the steel pipe distributes by each seam crossing, not only causes heat loss, also can cause external protection expanded by thermal softening simultaneously; quicken it and wear out, cracking infiltration at last.Promptly waste energy and shortened working life of heat-insulation system.Though many patents and bibliographical information the have been arranged making method of various insulation pipes, their major parts only are used to carry the superheated vapor below 300 ℃, can not be used to carry that thermoelectricity plant more than 300 ℃ produces up to the hyperthermia and superheating steam more than 350 ℃.Even there are some special insulation pipes to be used for hyperthermia and superheating delivery of steam more than 350 ℃, but because it handles imperfection in the insulation of links such as threeway, elbow, fixed bearing ring flat-plate, compensator, drain pipe and humidity discharging pipe, cause the waste of the energy equally, and this special insulation pipe cost is higher.
Summary of the invention
The objective of the invention is to be used to carry hyperthermia and superheating steam, to reach the purpose that reduces heat loss, prolongation insulation pipe life-span and reduce cost by a kind of steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system with unique texture is provided.
The technical solution adopted for the present invention to solve the technical problems is: a kind of steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system is provided, is made up of insulation pipe, threeway, elbow, fixed bearing ring flat-plate, compensator, drain pipe and humidity discharging pipe, be characterized in:
A, insulation pipe, threeway and compensator are the steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating pipeline, steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating threeway and steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating compensator, from the inside to surface successively by interior steel pipe, high temperature binding agent layer, silicate high temperature fiber felt drag reduction layer, silicate insulation tile layer, organic high temperature-resistant RPUF thermal insulation layer, spiral weld protection steel pipe, the FBE of 6-8 micron, the high density polyethylene protective coating of the adhesive layer of 170-250 micron and 3-5 millimeter is formed, and is filled with the hydrophobic foam asbestus between the insulation tile seam of silicate insulation tile layer;
B, elbow, drain pipe and humidity discharging pipe are steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating elbow, steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating drain pipe and steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating humidity discharging pipe, are made up of interior steel pipe (1), rock wool pipe (18), protection steel pipe (5), the FBE (6) of 6-8 micron, the adhesive layer (7) of 170-250 micron and the high density polyethylene protective coating (8) of 3-5 millimeter successively from the inside to surface;
C, fixed bearing ring flat-plate are welded on respectively on the protection steel pipe and interior steel pipe of thermal insulation pipe, and by fixed bearing stiffening rib fixed support in addition.
The binding agent of high temperature binding agent layer of the present invention is made up of following components in part by weight:
Organic siliconresin 20
Mixed solvent 10
Mica flour 6
Wherein mixed solvent is that the volume ratio of toluene and acetone is 2: 1, and this binding agent can bear very high temperature, under 400 ℃, does not flow, and never degenerates; Described silicate high temperature fiber felt drag reduction layer is an alumina silicate high temperature fiber felt; Described silicate insulation tile layer is the insulation tile that light microporous calcium silicate is made; Described adhesive layer is the ABS adhesive, and its constituent has following weight ratio: MEK: ABS: toluene=6: 4: 5.
The making method of the insulation pipe in this steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system, threeway and compensator is: a, get PN1.6 Spiral Steel Pipe or the seamless steel pipe that weld bead height is the 2-4 millimeter and make interior steel pipe; surface derusting is handled back spraying high temperature resistant inorganic binding agent (reserving 2-3 millimeter distance in the weld seam both sides); be stained with the high temperature fiber felt again and do the drag reduction layer; when steel pipe is heated when flexible, play the effect of drag reduction and its outer thermal insulation layer of protection.B, fasten two-layer insulation tile fragment in the drag reduction layer outside, the insulation tile made from light microporous calcium silicate is the best, each adjacent seam misplaces mutually during fastening, and embed hydrophobic foam asbestus at each seam crossing such as circumferential weld and longitudinal joint and do the harmomegathus layer, trace takes place shrink when adjacent tile fragment seam is widened when the insulation tile fragment is heated, hydrophobic foam asbestus harmomegathus layer expands thereupon, distributes thus to prevent heat, reaches good heat insulation effect.C, in the insulation tile fragment outside, adopt the centering method to put spiral weld protection steel pipe, make the protection steel pipe coaxial with the steam steel pipe.D, to the protection steel pipe with the insulation tile fragment between the injection RPUF foamed material, foaming can solidify to form the RPUF thermal insulation layer in back 3 minutes.E, in protection outer wall of steel pipe polishing; reach nearly white level; after carrying out heating in medium frequency again; FBE, the adhesive layer of 170-250 micron and the high density polyethylene protective coating of 3-5 millimeter of spraying 6-8 micron are made insulation pipe, threeway, compensator and elbow in the steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system.The method difference of making steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating elbow, drain pipe and humidity discharging pipe just is to adopt the rock wool pipe to be incubated between interior steel pipe and the protection steel pipe.
Steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system provided by the present invention is compared with existing heat-insulation system, has increased the bearing power of heat-insulation system, and not yielding, heat insulation effect is even; Advantage such as have that high temperature resistant, high insulating effect, heat loss are few, favorable anti-corrosion effect and life-span are long is specially adapted to the conveying that temperature is higher than 300 ℃ superheated vapor, has good market prospects.
The invention will be further described below in conjunction with embodiment and accompanying drawing.
Description of drawings
The mouth of pipe sectional view of insulation pipe, threeway and elbow in Fig. 1 steel-sleeve steel steam direct buried anticorrosion heat-insulation system.
The combination section full figure of each constituent element of Fig. 2 steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system.
The fixed bearing sectional drawing of the steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system of Fig. 3 band humidity discharging pipe, drain pipe.
The threeway sectional drawing of Fig. 4 steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system.
The elbow sectional drawing of Fig. 5 steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system.
The insulation compensator sectional drawing of Fig. 6 steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system.
Among the figure, 1. interior steel pipe, 2. silicate high temperature fiber felt drag reduction layer, 3. silicate insulation tile layer; 4. the urethane foam thermal insulation layer is 5. protected steel pipe, 6. FBE, 7. adhesive layer; 8. polyethylene protective layer, 9. hydrophobic foam asbestus, 10. binding agent layer; 11. the bearing stiffening rib, 12. insulation pipes, 13. threeways; 14. drain pipe, 15. humidity discharging pipes, 16. compensators; 17. elbow, 18. bearing ring flat-plates, 19. rock wools pipe.
Embodiment
Embodiment 1.a, get PN1.6 Spiral Steel Pipe or the seamless steel pipe that weld bead height is the 2-4 millimeter and make interior steel pipe (1); surface derusting is handled back spraying high temperature resistant inorganic binding agent (10) (reserving 2-3 millimeter distance in the weld seam both sides); be stained with high temperature fiber felt (2) again and do the drag reduction layer; when steel pipe is heated when flexible, play the effect of drag reduction and its outer thermal insulation layer of protection.B, fasten two-layer insulation tile fragment (3) in the drag reduction layer outside, the insulation tile made from light microporous calcium silicate is the best, each adjacent seam misplaces mutually during fastening, and embed hydrophobic foam asbestus (9) at each seam crossing such as circumferential weld and longitudinal joint and do the harmomegathus layer, trace takes place shrink when adjacent tile fragment seam is widened when the insulation tile fragment is heated, hydrophobic foam asbestus harmomegathus layer expands thereupon, distributes thus to prevent heat, reaches good heat insulation effect.C, in the insulation tile fragment outside, adopt the centering method to put spiral weld protection steel pipe (5), make the protection steel pipe coaxial with the steam steel pipe.D, to the protection steel pipe with the insulation tile fragment between the injection RPUF foamed material, foaming can solidify to form RPUF thermal insulation layer (4) in back 3 minutes.E, in protection outer wall of steel pipe polishing; reach nearly white level; after carrying out heating in medium frequency again; FBE (6), the adhesive layer (7) of 170-250 micron and the high density polyethylene protective coating (8) of 3-5 millimeter of spraying 6-8 micron are made insulation pipe (12), steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating threeway (13) and compensator (16) in the steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system.The method difference of making steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating elbow (17), drain pipe (14) and humidity discharging pipe (15) just is to adopt rock wool pipe (19) to be incubated between interior steel pipe and the protection steel pipe.Fixed bearing ring flat-plate (18) is welded on respectively on the protection steel pipe (5) and interior steel pipe (1) of thermal insulation pipe, and by fixed bearing stiffening rib (11) fixed support in addition.
Form steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system by steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating insulation pipe (12), threeway (13), compensator (16), elbow (17), drain pipe (14), humidity discharging pipe (15) and fixed bearing ring flat-plate (18).
Claims (5)
1. a steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system is made up of insulation pipe, threeway, elbow, fixed bearing ring flat-plate, compensator, drain pipe and humidity discharging pipe, it is characterized in that:
A, insulation pipe, threeway and compensator are steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating pipeline (12), steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating threeway (13) and steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating compensator (16), from the inside to surface successively by interior steel pipe (1), high temperature binding agent layer (10), silicate high temperature fiber felt drag reduction layer (2), silicate insulation tile layer (3), organic high temperature-resistant RPUF thermal insulation layer (4), spiral weld protection steel pipe (5), the FBE of 6-8 micron (6), the high density polyethylene protective coating (8) of adhesive layer of 170-250 micron (7) and 3-5 millimeter is formed, and is filled with hydrophobic foam asbestus (9) between the insulation tile seam of silicate insulation tile layer (3);
B, elbow, drain pipe and humidity discharging pipe are steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating elbow (17), steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating drain pipe (14) and steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating humidity discharging pipe (15), are made up of interior steel pipe (1), rock wool pipe (19), protection steel pipe (5), the FBE (6) of 6-8 micron, the adhesive layer (7) of 170-250 micron and the high density polyethylene protective coating (8) of 3-5 millimeter successively from the inside to surface;
C, fixed bearing ring flat-plate (18) are welded on respectively on the protection steel pipe (5) and interior steel pipe (1) of thermal insulation pipe, and by fixed bearing stiffening rib (11) fixed support in addition.
2. steel-sleeve steel steam direct buried anticorrosion heat-insulation system according to claim 1 is characterized in that the binding agent of described high temperature binding agent layer (10) is made up of following components in part by weight:
Organic siliconresin 20
Alumina powder solvent 7
Mixed solvent 10
Mica flour 6
Wherein mixed solvent is that the volume ratio of toluene and acetone is 2: 1.
3. steel-sleeve steel steam direct buried anticorrosion heat-insulation system according to claim 1 is characterized in that described silicate high temperature fiber felt drag reduction layer (2) is an alumina silicate high temperature fiber felt.
4. steel-sleeve steel steam direct buried anticorrosion heat-insulation system according to claim 1 is characterized in that the insulation tile that described silicate insulation tile layer (3) is made for light microporous calcium silicate.
5. steel-sleeve steel steam direct buried anticorrosion heat-insulation system according to claim 1 is characterized in that described adhesive layer is the ABS adhesive, and its constituent has following weight ratio: MEK: ABS: toluene=6: 4: 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100546276A CN100335839C (en) | 2005-03-07 | 2005-03-07 | Steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system |
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|---|---|---|---|
| CNB2005100546276A CN100335839C (en) | 2005-03-07 | 2005-03-07 | Steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system |
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| CN1654877A true CN1654877A (en) | 2005-08-17 |
| CN100335839C CN100335839C (en) | 2007-09-05 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102692030A (en) * | 2012-06-14 | 2012-09-26 | 安徽沃木采暖科技有限公司 | 90-degree acid-resistant adapter with ash cleaning port |
| CN102692028A (en) * | 2012-06-14 | 2012-09-26 | 安徽沃木采暖科技有限公司 | Balanced 45-degree transfer conveyor |
| CN102705849A (en) * | 2012-06-14 | 2012-10-03 | 安徽沃木采暖科技有限公司 | 135-degree cross acid resistant joint of conveying pipe |
| CN103912752A (en) * | 2014-03-31 | 2014-07-09 | 大连科华热力管道有限公司 | Steel-sleeving-steel directly-buried internal-pressure type compensator with leakage point troubleshooting device |
| CN106979454A (en) * | 2017-03-29 | 2017-07-25 | 宁波万里管道有限公司 | A kind of hydrophobic moisture discharge device of Buried Steam Pipe |
| CN109572011A (en) * | 2018-12-05 | 2019-04-05 | 广州骊阳能源科技有限公司 | A kind of production method of composite thermal-insulating pipe |
| CN112793243A (en) * | 2020-12-31 | 2021-05-14 | 北京京能未来燃气热电有限公司 | Heat insulation structure suitable for pipelines in cold and hot same-network pipeline well room and installation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2293699Y (en) * | 1997-05-16 | 1998-10-07 | 郭春秋 | Direct buried corrosion-proof insulated pipe |
| CN2365503Y (en) * | 1998-11-17 | 2000-02-23 | 黑龙江电力设计院大连分院 | High-temperature steam pipeline steel bushing steel direct-buried sealing pipe fitting |
| CN2438911Y (en) * | 2000-08-29 | 2001-07-11 | 陈随成 | High-temperature direct-buried disengaging waterproof composite insulating pipeline |
| CN2608805Y (en) * | 2003-01-20 | 2004-03-31 | 天津大学 | Direct-buried vacuu mheat insulatnig steam pipeline compensating section |
| CN2656772Y (en) * | 2003-11-21 | 2004-11-17 | 中国石油天然气集团公司 | Steel pipe with strong acid-resisting and anticorrosive inside coating |
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2005
- 2005-03-07 CN CNB2005100546276A patent/CN100335839C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692030A (en) * | 2012-06-14 | 2012-09-26 | 安徽沃木采暖科技有限公司 | 90-degree acid-resistant adapter with ash cleaning port |
| CN102692028A (en) * | 2012-06-14 | 2012-09-26 | 安徽沃木采暖科技有限公司 | Balanced 45-degree transfer conveyor |
| CN102705849A (en) * | 2012-06-14 | 2012-10-03 | 安徽沃木采暖科技有限公司 | 135-degree cross acid resistant joint of conveying pipe |
| CN103912752A (en) * | 2014-03-31 | 2014-07-09 | 大连科华热力管道有限公司 | Steel-sleeving-steel directly-buried internal-pressure type compensator with leakage point troubleshooting device |
| CN103912752B (en) * | 2014-03-31 | 2016-03-30 | 大连科华热力管道有限公司 | There is the steel sleeve steel direct-buried internal pressure type compensator of leak source examination device |
| CN106979454A (en) * | 2017-03-29 | 2017-07-25 | 宁波万里管道有限公司 | A kind of hydrophobic moisture discharge device of Buried Steam Pipe |
| CN109572011A (en) * | 2018-12-05 | 2019-04-05 | 广州骊阳能源科技有限公司 | A kind of production method of composite thermal-insulating pipe |
| CN112793243A (en) * | 2020-12-31 | 2021-05-14 | 北京京能未来燃气热电有限公司 | Heat insulation structure suitable for pipelines in cold and hot same-network pipeline well room and installation method thereof |
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| Publication number | Publication date |
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| CN100335839C (en) | 2007-09-05 |
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