CN2293699Y - Direct buried corrosion-proof insulated pipe - Google Patents
Direct buried corrosion-proof insulated pipe Download PDFInfo
- Publication number
- CN2293699Y CN2293699Y CN 97217854 CN97217854U CN2293699Y CN 2293699 Y CN2293699 Y CN 2293699Y CN 97217854 CN97217854 CN 97217854 CN 97217854 U CN97217854 U CN 97217854U CN 2293699 Y CN2293699 Y CN 2293699Y
- Authority
- CN
- China
- Prior art keywords
- steel pipe
- layer
- tile fragment
- direct buried
- insulating tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model belongs to a heat supply pipeline, comprising a steel pipe 1, thermal-insulating shoes 3, 4 positioned at the outer side of the steel pipe 1 sequentially, an outer heat-insulating layer 5 and a protective layer 6. The heat supply pipeline is characterized in that an expansion layer 8 is arranged between the adjacent shoes of the thermal-insulating shoes 3, 4. The utility model has the advantages of little heat loss, corrosion resistance, long service life, etc.
Description
The utility model belongs to a kind of thermal insulation pipe, is applicable to that mainly direct-burried is in underground conveying superheated vapor.
The city heat supply pipeline adopts the directly buried installation mode more at present, and promptly heat supply pipeline directly is embedded in underground.Existing heat supply pipeline structure is: innermost layer is the metal steel pipe; be provided with thermal insulation layer in the steel pipe outside, thermal insulation layer mostly is double-layer structure, and inner thermal insulating layer forms for the insulation tile fragment fastens; skin is a polyurethane rigid foam plastic, and outermost surface is to be the plastic tube protective layer of material with PVC.Has following shortcoming: because the insulation tile fragment is the arc tile fragment that light microporous calcium silicate is made; when being fastened on the steel pipe outside; have between the adjacent tile fragment by many seams; when superheated vapor passes through steel pipe; because insulation tile block of material characteristic is determined; micro-shrinkage phenomenon can take place in the insulation tile fragment; making one by one, joint gap strengthens; heat in the steel pipe distributes by each seam crossing; not only cause heat loss; also can cause external protection expanded by thermal softening simultaneously, very causing cracking infiltration, promptly waste energy and shorten thermal insulation pipe working life.
The purpose of this utility model provides and a kind ofly suppresses to be incubated the tile fragment back seam of being heated and widen, reduce heat loss, the increase thermal insulation pipe direct buried anticorrosion insulating tube in working life.
Technical solution of the present utility model is: a kind of direct buried anticorrosion insulating tube; it comprises steel pipe 1, is positioned at insulation tile fragment 3,4, external thermal insulation 5, the protective layer 6 in steel pipe 1 outside successively, it is characterized in that: be provided with breathing layer 8 between the adjacent tile fragment of described insulation tile fragment 3,4.
Described breathing layer 8 is the waterproof foam asbestos.
Be provided with friction layer 2 between described steel pipe 1 and the insulation tile fragment 3.
Described friction layer 2 is a fibrofelt.
Described steel pipe 1 is provided with support ring 10, is provided with pole 9 between support ring 10 both sides and the steel pipe 1, is provided with rock wool layer 11 near support ring 10 places between insulation tile fragment 4 and protective layer 6.
Described protective layer 6 is a steel pipe, and its outer surface scribbles anticorrosive coat 7.
The utility model compared with prior art, advantage such as it is few to have a heat loss, and the thermal insulation pipe hull-skin temperature is low, the life-span is long owing to be provided with friction layer between steel pipe and the thermal insulation layer, expanding freely in the steel pipe back that is heated, can not have any impact to thermal insulation layer.
Below in conjunction with the drawings and the specific embodiments the utility model is further described:
Fig. 1 is the thermal insulation pipe sectional view of the utility model embodiment;
Fig. 2 is the sectional arrangement drawing of thermal insulation pipe.
As shown in the figure: 1 is steel pipe, adopts PN1.6 helix seam Electric Welded Steel Pipe, its weld bead height between 3～5mm all can, also can adopt seamless steel pipe.Steel pipe 1 surface is done to scribble high-temperature adhesives (2～3mm distance is reserved in the weld seam both sides) after the processing of rust removing, is stained with the high temperature fiber felt again and makes friction layer 2, when stretching after steel pipe 1 is heated, plays its outer thermal insulation layer effect of drag reduction and protection.Fasten two-layer insulation tile fragment 3 and 4 in friction layer 2 outsides, its material is light microporous calcium silicate.Each adjacent seam misplaces mutually during fastening, and all embeds breathing layer 8 at each seam crossing (comprising circumferential weld, longitudinal joint), and the material of breathing layer 8 is: the waterproof foam asbestos.Trace takes place shrink when adjacent tile fragment seam is widened when insulation tile fragment 3,4 is heated, breathing layer 8 expands thereupon, in case heat distributes certainly, reaches good heat insulation effect herein.At insulation tile fragment 4 outsides cover matcoveredn 6, protective layer 6 is selected steel pipe for use.Adopt the centering method to support protective layer 6 and make it coaxial with steel pipe 1, inject polyurethane rigid foam plastic between protective layer 6 and insulation tile fragment 4, foaming can solidify to form external thermal insulation 5 in back 10 minutes.Be provided with anticorrosive coat 7 in protective layer 6 appearances; at first on protective layer 6 outer walls, sandblast and reach milky white and carry out preservative treatment; be coated with one deck HD type epoxy coal asphalt paint again; twine one deck glass fibre cloth; be coated with one deck HD type epoxy coal asphalt paint again; twine one deck glass fibre cloth again, be coated with one deck HD type epoxy coal asphalt paint again, be coated with one deck HD type epoxy coal asphalt paint (i.e. two cloth, four lacquers) at last again.Make " steel bushing steel " direct buried anticorrosion insulating tube.
Because thermal insulation pipe is embedded in when underground, be interval with anchor block and support, therefore the anchor block spacing can, be welded with the support ring 10 that steel plate is made on steel pipe 1 about 30 meters, and its both sides are welded with pole 9 and are connected (as shown in Figure 2) with steel pipe 1.At close support ring 10 places, being provided with rock wool layer 11 replacements between insulation tile fragment 4 and the protective layer 6 is the external thermal insulation 5 of material with the polyurethane rigid foam plastic, prevents because support ring 10 heat transfers damage external thermal insulation 5.During installation, the support ring place cast in the cemented pier get final product.
Claims (6)
1, a kind of direct buried anticorrosion insulating tube, it comprises steel pipe [1], is positioned at insulation tile fragment [3,4], external thermal insulation [5], the protective layer [6] in steel pipe [1] outside successively, it is characterized in that: be provided with breathing layer [8] between the adjacent tile fragment of described insulation tile fragment [3,4].
2, direct buried anticorrosion insulating tube according to claim 1 is characterized in that: described breathing layer [8] is the waterproof foam asbestos.
3, direct buried anticorrosion insulating tube according to claim 2 is characterized in that: be provided with friction layer [2] between described steel pipe [1] and the insulation tile fragment [3].
4, direct buried anticorrosion insulating tube according to claim 3 is characterized in that: described friction layer [2] is a fibrofelt.
5, according to claim 1 or 2 or 3 or 4 described direct buried anticorrosion insulating tubes; it is characterized in that: described steel pipe [1] is provided with support ring [10]; be provided with pole [9] between support ring [10] both sides and the steel pipe [1], between insulation tile fragment [4] and protective layer [6], locate to be provided with rock wool layer [11] near support ring [10].
6, direct buried anticorrosion insulating tube according to claim 5 is characterized in that: described protective layer [6] is a steel pipe, and its outer surface scribbles anticorrosive coat [7].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97217854 CN2293699Y (en) | 1997-05-16 | 1997-05-16 | Direct buried corrosion-proof insulated pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97217854 CN2293699Y (en) | 1997-05-16 | 1997-05-16 | Direct buried corrosion-proof insulated pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2293699Y true CN2293699Y (en) | 1998-10-07 |
Family
ID=33934276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97217854 Expired - Fee Related CN2293699Y (en) | 1997-05-16 | 1997-05-16 | Direct buried corrosion-proof insulated pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2293699Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100335839C (en) * | 2005-03-07 | 2007-09-05 | 郭春秋 | Steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system |
| CN104373755A (en) * | 2014-10-27 | 2015-02-25 | 宁夏天纵泓光余热发电技术有限公司 | Submerged arc furnace smoke vacuum casting material heat preservation pipe |
| CN104455932A (en) * | 2014-10-28 | 2015-03-25 | 宁夏天纵泓光余热发电技术有限公司 | Novel submerged arc furnace smoke heat preservation pipe |
| CN105156831A (en) * | 2015-09-02 | 2015-12-16 | 中国石油天然气集团公司 | Composite mouth-repairing structure for counterweight layer of large-caliber submarine pipeline |
| CN107559501A (en) * | 2017-09-29 | 2018-01-09 | 安徽德全新型建材科技有限公司 | A kind of safe steam conveying pipe |
| CN112229242A (en) * | 2016-07-08 | 2021-01-15 | 法国德西尼布 | Heat exchanger for quenching reaction gas |
-
1997
- 1997-05-16 CN CN 97217854 patent/CN2293699Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100335839C (en) * | 2005-03-07 | 2007-09-05 | 郭春秋 | Steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system |
| CN104373755A (en) * | 2014-10-27 | 2015-02-25 | 宁夏天纵泓光余热发电技术有限公司 | Submerged arc furnace smoke vacuum casting material heat preservation pipe |
| CN104373755B (en) * | 2014-10-27 | 2016-08-17 | 宁夏天纵泓光余热发电技术有限公司 | Mineral heating furnace flue vacuum pouring material insulating tube |
| CN104455932A (en) * | 2014-10-28 | 2015-03-25 | 宁夏天纵泓光余热发电技术有限公司 | Novel submerged arc furnace smoke heat preservation pipe |
| CN104455932B (en) * | 2014-10-28 | 2016-08-24 | 宁夏天纵泓光余热发电技术有限公司 | Novel mineral heating furnace flue insulating tube |
| CN105156831A (en) * | 2015-09-02 | 2015-12-16 | 中国石油天然气集团公司 | Composite mouth-repairing structure for counterweight layer of large-caliber submarine pipeline |
| CN105156831B (en) * | 2015-09-02 | 2018-11-02 | 中国石油天然气集团公司 | A kind of compound repaired mouth structure of heavy caliber submarine pipeline weight coating |
| CN112229242A (en) * | 2016-07-08 | 2021-01-15 | 法国德西尼布 | Heat exchanger for quenching reaction gas |
| CN107559501A (en) * | 2017-09-29 | 2018-01-09 | 安徽德全新型建材科技有限公司 | A kind of safe steam conveying pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Guo Chunqiu Document name: payment instructions |
|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Guo Chunqiu Document name: Notice of termination |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |