CN102720915B - Thermal insulation expansion joint of reducing adapter tube - Google Patents
Thermal insulation expansion joint of reducing adapter tube Download PDFInfo
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- CN102720915B CN102720915B CN201210237212.2A CN201210237212A CN102720915B CN 102720915 B CN102720915 B CN 102720915B CN 201210237212 A CN201210237212 A CN 201210237212A CN 102720915 B CN102720915 B CN 102720915B
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Abstract
The invention discloses a thermal insulation expansion joint of a reducing adapter tube. The expansion joint is characterized by comprising a corrugated tube (2); both ends of the corrugated tube (2) are respectively connected with two reducing adapter tubes (1); the inner sides of the two reducing adapter tubes (1) are respectively attached and connected to the end part of two reducing lining tubes; and a thermal insulation layer is arranged in a thermal insulation cavity formed among the corrugated tube (2), the two reducing adapter tubes (1) and the two reducing lining tubes. The invention can fully meet the requirements of full-load and long-period safe operation of a process pipe of a petrochemical engineering device at high temperature and high flow rate; in normal operating state, the expansion joint has no abnormal deformation and the medium flows stably, and the surface temperature of the corrugated tube does not exceed the designed temperature during high-temperature operation for a long time; the reducing combinational lining meets the requirement of deformation coordination of the expansion joint, does not fall off and has no abnormal deformation during high-temperature operation for a long time; and the reducing adapter tube has no local deformation or crack during high-temperature operation for a long time.
Description
Technical field
The present invention relates to a kind of petrochemical plant process pipe, specifically a kind of expansion joint.
Background technique
The technique of petrochemical plant process pipe and design condition are comparatively harsh, design temperature is higher, reaches 600～750, because medium temperature, flow velocity are higher, bellows need to carry out effective thermal insulation and prevent that material from gathering, and the design of butt tube and inside lining sleeve all has the requirement of reducing particular design.Normal conditions adopts the method for segmentation welding to reach the object of taking over reducing, and this at high temperature can cause that the discontinuous stress that brings of structure is concentrated, makes to take over intensity and declines, and likely produces local deformation or crackle, brings thus potential safety hazard.Prior art not yet has the expansion joint that meets above requirement.
Summary of the invention
Object of the present invention is exactly for above-mentioned the deficiencies in the prior art, provides one under hot environment, to work for a long time, and the reducing that flow resistance is little is taken over thermal insulation type expansion joint.
The technical solution used in the present invention is as follows:
A kind of reducing is taken over thermal insulation type expansion joint, it is characterized in that it comprises bellows, the two ends of bellows are taken over and are connected with two sections of reducings respectively, described two sections of reducings are taken over inner side and are connected with two sections of reducing internal lining pipe end laminatings respectively, and described bellows, two sections of reducings are taken in the thermal insulation cavity forming between two sections of reducing internal lining pipes and are provided with heat-insulating layer.
The laminating position that described two sections of reducings are taken over inner side and two sections of reducing internal lining pipes is equipped with circular hole or the elliptical aperture plug welding of circumference uniform distribution.
Described two sections of relative ends of reducing internal lining pipe are crisscross arranged, and wherein the staggered position of a reducing internal lining pipe adopts variable-diameter structure.
Described heat-insulating layer is arranged to three sections, and the heat-insulating layer three structure from-inner-to-outers that are positioned at bellows inner side are that innermost layer adopts ceramic fiber blanket, the parcel silicon cloth outside ceramic fiber blanket, and silicon cloth is wrapped with Stainless Steel Cloth outward, silicon cloth in Stainless Steel Cloth outer wrap; Heat-insulating layer two structures that are positioned at described heat-insulating layer three two ends are ceramic fiber blanket or ceramic fiber cotton; The heat-insulating layer one that is positioned at described heat-insulating layer two outboard ends is heat-resisting silicon cloth.
Described heat-insulating layer one adopts the clamp of circumference uniform distribution to be fixed with the intersection of heat-insulating layer two.
Beneficial effect of the present invention has:
Can meet the requirement of the petrochemical plant process pipe full and down long period safe operation of high temperature, high flow rate completely, under normal operating state, expansion joint is steady without abnormal deformation, media flow, under long term high temperature, work, bellows surface temperature can not exceed design temperature; Reducing combined inner lining meets expansion joint compatibility of deformation requirement, under long term high temperature, work do not come off, without abnormal deformation; Under long term high temperature, work, reducing is taken over and be there will not be local deformation or crackle.
Reducing of the present invention is taken over and is adopted twice variable-diameter structure, reaches distortion and is fusiform object.Effectively avoided the conventional method with segmentation welding to reach taking over reducing object to bring at high temperature that structure is discontinuous causes that stress concentrates, caused taking over that intensity declines and the consequence of bringing potential safety hazard.The present invention's employing is fusiform reducing adapter and has solved the potential safety hazard of bringing because structure is discontinuous under high temperature completely.Adopt left and right reducing internal lining pipe combination to reach the object of water conservancy diversion, thermal insulation, meet compatibility of deformation simultaneously and flow resistance is dropped to minimum;
Liner reducing end, left and right and reducing are taken over laminating welding, outside conventional circumferential weld welding, in the circular hole or the elliptical aperture plug welding that have increased mutually one group of circumference uniform distribution apart from weld seam nearby, avoided the hidden danger of the Fall of lining that normal welding often occurs, the normal work of the liner of guaranteeing product of the present invention under long term high temperature environment; In the cavity forming between combined inner lining and reducing adapter and bellows, adopt the specific combination heat isolating structure in the combination of different parts different materials by three parts, this specific combination heat isolating structure thermal insulation effect stability is reliable, meet the thermal insulation requirement while being out of shape under expansion joint working state, can guarantee that the surface temperature of bellows is no more than design temperature under long term high temperature.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described:
As shown in Figure 1, bellows of the present invention 2 two ends are connected with reducing adapter 1; Reducing is taken over 1 and is connected with reducing internal lining pipe 1,24 laminatings of reducing internal lining pipe respectively, and reducing internal lining pipe 1, reducing internal lining pipe 24 are at reducing sticking part along circumferential openings, and aperture portion is taken over 1 with reducing and is connected, Kong Zhongwei circular hole or elliptical aperture plug welding 9; Combined crosswise as mutual in Fig. 1 is pressed in reducing internal lining pipe 1, one end that reducing internal lining pipe 24 is relative, with reducing adapter 1, a thermal insulation cavity of bellows 2 common compositions, this thermal insulation cavity is divided into three parts, heat-insulating layer 1 adopts heat-resisting silicon cloth to fill at position as shown in the figure full, and is fixed with the clamp 8 of the equal portion of circumference at heat-insulating layer 1 and the intersection of heat-insulating layer 26; Heat-insulating layer 26 adopts ceramic fiber blanket or ceramic fiber cotton to fill completely at position as shown in the figure full; Heat-insulating layer 37 wraps up ceramic fiber blanket at position as shown in the figure with silicon cloth, at silicon cloth, is wrapped with Stainless Steel Cloth outward, finally at Stainless Steel Cloth outer wrap silicon cloth, forms a thermal insulation parcel, and this thermal insulation parcel will fill up whole space as shown in the figure.
The fusiform reducing of the present invention is taken over and the composite structure of reducing internal lining pipe can reach the thermal insulation of bellows part and prevent the object that material gathers, and can effectively flow resistance be reduced to minimum again, and guarantee that the liner of product of the present invention does not come off under long term high temperature environment.
Other the undeclared part the present invention relates to is same as the prior art.
Claims (3)
1. a reducing is taken over thermal insulation type expansion joint, it is characterized in that it comprises bellows (2), the two ends of bellows (2) are taken over (1) with two sections of reducings respectively and are connected, described reducing is taken over (1) and is adopted twice variable-diameter structure, described two sections of reducings are taken over (1) inner side and are connected with two sections of reducing internal lining pipe end laminatings respectively, and described bellows (2), two sections of reducings are taken in the thermal insulation cavity forming between (1) and two sections of reducing internal lining pipes and are provided with heat-insulating layer; Described two sections of relative ends of reducing internal lining pipe are crisscross arranged, and wherein the staggered position of a reducing internal lining pipe adopts variable-diameter structure; Described heat-insulating layer is arranged to three sections, heat-insulating layer three (7) the structure from-inner-to-outers that are positioned at bellows (2) inner side are that innermost layer adopts ceramic fiber blanket, parcel silicon cloth outside ceramic fiber blanket, silicon cloth is wrapped with Stainless Steel Cloth outward, silicon cloth in Stainless Steel Cloth outer wrap; Heat-insulating layer two (6) structures that are positioned at described heat-insulating layer three (7) two ends are ceramic fiber blanket or ceramic fiber cotton; The heat-insulating layer one (5) that is positioned at described heat-insulating layer two (6) outboard ends is heat-resisting silicon cloth.
2. reducing according to claim 1 is taken over thermal insulation type expansion joint, it is characterized in that described two sections of reducings adapters (1) inner side and the laminating position of two sections of reducing internal lining pipes are equipped with circular hole or the elliptical aperture plug welding (9) of circumference uniform distribution.
3. reducing according to claim 1 is taken over thermal insulation type expansion joint, it is characterized in that described heat-insulating layer one (5) and the intersection of heat-insulating layer two (6) adopt the clamp (8) of circumference uniform distribution to be fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210237212.2A CN102720915B (en) | 2012-07-10 | 2012-07-10 | Thermal insulation expansion joint of reducing adapter tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210237212.2A CN102720915B (en) | 2012-07-10 | 2012-07-10 | Thermal insulation expansion joint of reducing adapter tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102720915A CN102720915A (en) | 2012-10-10 |
| CN102720915B true CN102720915B (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210237212.2A Active CN102720915B (en) | 2012-07-10 | 2012-07-10 | Thermal insulation expansion joint of reducing adapter tube |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117091019B (en) * | 2023-10-18 | 2024-02-23 | 沈阳晨光弗泰波纹管有限公司 | Expansion absorption device and gas turbine exhaust system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU70943A1 (en) * | 1974-09-18 | 1975-03-06 | ||
| DE9002752U1 (en) * | 1990-03-09 | 1991-04-25 | IWK Regler und Kompensatoren GmbH, 7513 Stutensee | Flexible piping element with thermal insulation |
| TW321712B (en) * | 1995-11-28 | 1997-12-01 | Shell Int Research | |
| CN2364316Y (en) * | 1998-01-15 | 2000-02-16 | 南京晨光东螺波纹管有限公司 | Cooled high-temp. bellows compensator |
| DE20003386U1 (en) * | 2000-02-24 | 2000-05-18 | Burgmann Dichtungswerk Feodor | Decoupling element for vibrations in exhaust pipes of internal combustion engines |
| CN201269380Y (en) * | 2008-05-20 | 2009-07-08 | 赵有德 | Corrugated compensator with stiffness reinforced flow guiding casing tube |
| CN201496714U (en) * | 2009-09-08 | 2010-06-02 | 泰州市新方圆补偿器制造有限公司 | High temperature resistant corrugated expansion joint |
| CN202252580U (en) * | 2011-10-29 | 2012-05-30 | 重庆川仪自动化股份有限公司 | High-temperature-resistant metallic corrugated expansion joint |
| CN202708447U (en) * | 2012-07-10 | 2013-01-30 | 南京晨光东螺波纹管有限公司 | Thermal insulation expansion joint with reducing connecting pipes |
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2012
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| CN102720915A (en) | 2012-10-10 |
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Inventor after: Niu Yuhua Inventor after: Zhou Mingsheng Inventor after: Li Liang Inventor after: Zhang Qingwen Inventor after: Xu Rufeng Inventor after: Zhang Ying Inventor after: Fan Hui Inventor after: Wang Youlong Inventor before: Niu Yuhua Inventor before: Zhou Mingsheng Inventor before: Li Liang Inventor before: Zhang Qingwen Inventor before: Xu Rufeng Inventor before: Zhang Ying Inventor before: Fan Hui Inventor before: Wang Youlong |
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