CN202708447U - Thermal insulation expansion joint with reducing connecting pipes - Google Patents
Thermal insulation expansion joint with reducing connecting pipes Download PDFInfo
- Publication number
- CN202708447U CN202708447U CN 201220331860 CN201220331860U CN202708447U CN 202708447 U CN202708447 U CN 202708447U CN 201220331860 CN201220331860 CN 201220331860 CN 201220331860 U CN201220331860 U CN 201220331860U CN 202708447 U CN202708447 U CN 202708447U
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- Prior art keywords
- reducing
- expansion joint
- thermal insulation
- sections
- insulating layer
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Abstract
The utility model discloses a thermal insulation expansion joint with reducing connecting pipes. The expansion joint is characterized by comprising a corrugated pipe (2), wherein the two ends of the corrugated pipe (2) are connected with two sections of reducing connecting pipes (1) respectively; the inner sides of the reducing connecting pipes (1) are attached to the end parts of two sections of reducing lining pipes; and thermal insulation layers are arranged in thermal insulation cavity bodies formed between every two of the corrugated pipe (2), the reducing connecting pipes (1) and the reducing lining pipes. The requirements of full-load long-cycle safety running of a high-temperature high-flow rate process pipeline for a petrochemical plant completely can be met; in a normal operating state, the abnormal deformation of the expansion joint is avoided, and a medium flows stably; when the expansion joint works at high temperature for a long time, the surface temperature of the corrugated pipe cannot exceed designed temperature; by reducing combined linings, a requirement on the deformation compatibility of the expansion joint is met, and the drop and abnormal deformation of the linings are avoided when the linings work at high temperature for a long time; and when working at high temperature for a long time, the reducing connecting pipes cannot be locally deformed or cracked.
Description
Technical field
The utility model 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 purpose of taking over reducing, and this can cause that at high temperature the discontinuous stress that brings of structure is concentrated, and adapter intensity is descended, and might produce local deformation or crackle, brings thus potential safety hazard.Prior art not yet has the expansion joint that satisfies above requirement.
Summary of the invention
The purpose of this utility model is exactly for above-mentioned the deficiencies in the prior art, and providing a kind of can work under hot environment for a long time, and the reducing that flow resistance is little is taken over thermal insulation type expansion joint.
The technical solution adopted in the utility model 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 two sections reducings respectively and are linked to each other, described two sections reducings are taken over the inboard and are fitted with two sections reducing internal lining pipe ends respectively and link to each other, are provided with heat-insulating layer in the thermal insulation cavity that forms between described bellows, two sections reducing adapters and the two sections reducing internal lining pipes.
Described two sections reducings are taken over circular hole or the elliptical aperture plug welding that inboard applying position with two sections reducing internal lining pipes is equipped with circumference uniform distribution.
Described two sections relative ends of reducing internal lining pipe are crisscross arranged, and wherein variable-diameter structure is adopted at the staggered position of a reducing internal lining pipe.
Described heat-insulating layer is arranged to three sections, and the heat-insulating layer three structure from-inner-to-outers that are positioned at the bellows inboard are that innermost layer adopts ceramic fiber blanket, the parcel silicon cloth that ceramic fiber blanket is outer, and silicon cloth is wrapped with Stainless Steel Cloth outward, silicon cloth on the 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.
The beneficial effects of the utility model have:
Can satisfy the requirement of the petrochemical plant process pipe full and down long period safe operation of high temperature, high flow rate fully, expansion joint is steady without unusual distortion, media flow under normal operating state, work under long term high temperature, the bellows surface temperature can not exceed design temperature; The reducing combined inner lining satisfies expansion joint compatibility of deformation requirement, work under the long term high temperature do not come off, without unusually the distortion; Work under long term high temperature, reducing is taken over local deformation or crackle can not occur.
The utility model reducing is taken over and is adopted twice variable-diameter structure, reaches distortion and is fusiform purpose.Effectively avoided conventional method with the segmentation welding to reach taking over the reducing purpose to bring at high temperature the discontinuous stress that causes of structure to concentrate, caused taking over that intensity descends and the consequence of bringing potential safety hazard.The utility model employing is fusiform reducing adapter and has solved fully under the high temperature because the discontinuous potential safety hazard of bringing of structure.Adopt left and right sides reducing internal lining pipe combination to reach the purpose of water conservancy diversion, thermal insulation, satisfy simultaneously compatibility of deformation and flow resistance is dropped to minimum;
Liner reducing end, the left and right sides and reducing are taken over the welding of fitting, outside the circumferential weld welding of routine, circular hole or the elliptical aperture plug welding of one group of circumference uniform distribution have been increased mutually nearby at the distance weld seam, avoid the often hidden danger of the Fall of lining of appearance of normal welding, guaranteed the normal operation of liner under the long term high temperature environment of the utility model product; Adopt by three parts at the specific combination heat isolating structure of different parts with the different materials combination in the cavity that forms between combined inner lining and reducing adapter and the bellows, this specific combination heat isolating structure thermal insulation effect stability is reliable, satisfy the thermal insulation requirement when being out of shape under the expansion joint working state, can guarantee that the surface temperature of bellows is no more than design temperature under long term high temperature.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
The utility model is further described below in conjunction with accompanying drawing:
As shown in Figure 1, the utility model bellows 2 two ends are connected with reducing adapter 1; Reducing is taken over 1 and is fitted and link to each other with reducing internal lining pipe 1, reducing internal lining pipe 24 respectively, and along circumferential openings, aperture portion is taken over 1 with reducing and linked to each other Kong Zhongwei circular hole or elliptical aperture plug welding 9 at the reducing sticking part for reducing internal lining pipe 1, reducing internal lining pipe 24; Reducing internal lining pipe 1, reducing internal lining pipe 24 relative ends are pressed such as the mutual combined crosswise of Fig. 1, with reducing adapter 1, 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 at the intersection of heat-insulating layer 1 and heat-insulating layer 26 clamp 8 with the equal section of circumference; Heat-insulating layer 26 adopts ceramic fiber blanket or ceramic fiber cotton to fill fully 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, is wrapped with Stainless Steel Cloth outside silicon cloth, forms a thermal insulation parcel at Stainless Steel Cloth outer wrap silicon cloth at last, and this thermal insulation parcel will fill up whole space as shown in the figure.
The fusiform reducing of the utility model is taken over and the composite structure of reducing internal lining pipe can reach the thermal insulation of bellows part and prevent the purpose that material gathers, can effectively flow resistance be reduced to minimum again, and guarantee that the liner of the utility model product does not come off under the long term high temperature environment.
Other undeclared part that the utility model relates to is same as the prior art.
Claims (5)
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 reducings respectively and are linked to each other, described two sections reducings are taken over (1) inboard and are fitted with two sections reducing internal lining pipe ends respectively and link to each other, are provided with heat-insulating layer in the thermal insulation cavity that forms between described bellows (2), two sections reducing adapters (1) and the two sections reducing internal lining pipes.
2. reducing according to claim 1 is taken over thermal insulation type expansion joint, it is characterized in that the inboard applying position with two sections reducing internal lining pipes of described two sections reducings adapters (1) is 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 two sections relative ends of reducing internal lining pipe are crisscross arranged, and wherein variable-diameter structure is adopted at the staggered position of a reducing internal lining pipe.
4. reducing according to claim 1 is taken over thermal insulation type expansion joint, it is characterized in that described heat-insulating layer is arranged to three sections, being positioned at inboard heat-insulating layer three (7) the structure from-inner-to-outers of bellows (2) is that innermost layer adopts ceramic fiber blanket, the parcel silicon cloth that ceramic fiber blanket is outer, silicon cloth is wrapped with Stainless Steel Cloth outward, silicon cloth on the 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.
5. reducing according to claim 4 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 |
|---|---|---|---|
| CN 201220331860 CN202708447U (en) | 2012-07-10 | 2012-07-10 | Thermal insulation expansion joint with reducing connecting pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220331860 CN202708447U (en) | 2012-07-10 | 2012-07-10 | Thermal insulation expansion joint with reducing connecting pipes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202708447U true CN202708447U (en) | 2013-01-30 |
Family
ID=47588752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220331860 Expired - Fee Related CN202708447U (en) | 2012-07-10 | 2012-07-10 | Thermal insulation expansion joint with reducing connecting pipes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202708447U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720915A (en) * | 2012-07-10 | 2012-10-10 | 南京晨光东螺波纹管有限公司 | Thermal insulation expansion joint of reducing adapter tube |
-
2012
- 2012-07-10 CN CN 201220331860 patent/CN202708447U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720915A (en) * | 2012-07-10 | 2012-10-10 | 南京晨光东螺波纹管有限公司 | Thermal insulation expansion joint of reducing adapter tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
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 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20150710 |
|
| EXPY | Termination of patent right or utility model |