CN104358961B - A kind of hinge type expansion joint for high temperature pipe - Google Patents
A kind of hinge type expansion joint for high temperature pipe Download PDFInfo
- Publication number
- CN104358961B CN104358961B CN201410533382.4A CN201410533382A CN104358961B CN 104358961 B CN104358961 B CN 104358961B CN 201410533382 A CN201410533382 A CN 201410533382A CN 104358961 B CN104358961 B CN 104358961B
- Authority
- CN
- China
- Prior art keywords
- riser
- pipe
- thermal insulation
- temperature
- expansion joint
- Prior art date
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- 238000009413 insulation Methods 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000003351 stiffener Substances 0.000 claims abstract description 9
- 230000002787 reinforcement Effects 0.000 claims abstract description 7
- 238000005336 cracking Methods 0.000 claims description 7
- 230000007423 decrease Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 238000004523 catalytic cracking Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention belongs to petrochemical industry expansion joint compensation technique field, be specifically related to a kind of hinge type expansion joint for high temperature pipe. A kind of hinge type expansion joint for high temperature pipe proposing includes bellows (4), entrance point pipe (1) and port of export pipe (5); The two ends of the flap structure of corresponding its arranged outside of bellows (4) are separately fixed on riser; The both sides of riser (2) are provided with the ring flat-plate (3) being welded on entrance point pipe (1), port of export pipe (5); The both sides of ring flat-plate (3) are respectively arranged with riser stiffener (11); The described riser stiffener (11), reinforcement (6) and the ring flat-plate (3) that are positioned at riser the same side connect and compose the sidepiece thermal insulation areas (12) of box-structure; In sidepiece thermal insulation areas (12), be provided with air and heat-barrier material; The inside of described riser arranges inner thermal insulation areas (13). The present invention ensures that riser and the attachment weld of end pipe no longer ftracture, and have improved the security of expansion joint operation.
Description
Technical field
The invention belongs to petrochemical industry expansion joint compensation technique field, be specifically related to a kind of hinge type expansion joint for high temperature pipe.
Background technology
In the refining process of oil, the regenerated flue gas of catalytic cracking unit contains a large amount of callable energy, accounts for 26% of full device energy consumption. The flue gas that energy-recuperation system produces catalytic cracking is introduced exhaust turbine, reclaims its pressure energy and drives main air blower acting, or drive generator generating, and the potential energy and the heat energy that make full use of in flue gas produce power, with reclaiming gas energy, reach energy-conservation object. In energy-recuperation system, the suction line of exhaust turbine designs for hot wall, and pipe interior does not have insulated lining, and the harshest its operating temperature of condition is 650～750 DEG C, the higher 0.2～0.35MPa of being of operating pressure. For this type high temp exhaust turbine suction line, for meeting the force request of pipeline flexible and the exhaust turbine mouth of pipe, general adopt that (structural shape is shown in Fig. 1 by one group or two group of three hinge expansion joint,) the hinge combination of composition, add that a universal double-jointed hinge type expansion joint compensates the displacements such as thermal walking, equipment settlement of foundation and the pipeline installation deviation that piping produces.
Be austenitic stainless steel material for its end tube material of hinge type expansion joint and the main stressed member riser that compensate exhaust turbine suction line, the riser of expansion joint manages with end the Welding Structure that adopts complete penetraction and fusion in welding, in running, repeatedly there is the inefficacy cases such as stress members distortion, riser and end pipe attachment weld cracking, affected the reliability service of device.
Think by analysis and mainly contain the reason of following two aspects:
1) taking over inside is high-temperature gas, outside especially riser directly contacts with atmosphere with end pipe attachment weld region, can be dispelled the heat, therefore the shell ring inside and outside temperature difference is larger, there is the temperature stress causing because of the temperature difference in welded seam area, this temperature stress and bellows pressure thrust cause that the acting in conjunction of shear stress causes weld cracking.
2) weld seam high-temperature component is in During Process of Long-term Operation, and the variation of welded seam area microstructure brings the mechanical property difference of different tissues subregion, and high-temerature creep occurs, and makes the strength decreased of weld seam cause the Cracking Failure of weld seam.
Summary of the invention
The object of the invention is to propose a kind of hinge type expansion joint for high temperature pipe, can ensure that riser and the attachment weld of end pipe no longer ftracture, and improve the security of expansion joint operation.
The present invention has been that an above-mentioned purpose adopts following technical scheme:
For a hinge type expansion joint for high temperature pipe, described hinge type expansion joint includes bellows, entrance point pipe and port of export pipe; Described bellows is connected between entrance point pipe and port of export pipe; Corresponding described bellows has to retrain the flap structure of pressure thrust that bellows produces in its arranged outside; The two ends of described flap structure are separately fixed on riser; The riser that is connected to flap structure two ends is welded on respectively on entrance point pipe and port of export pipe; The both sides of described riser are provided with the ring flat-plate being welded on entrance point pipe, port of export pipe; The both sides of described ring flat-plate are respectively arranged with riser stiffener and reinforcement; The described riser stiffener, reinforcement and the ring flat-plate that are positioned at riser the same side connect and compose the sidepiece thermal insulation areas of box-structure; In described sidepiece thermal insulation areas, be provided with air and heat-barrier material, utilize the thermal insulation function of the interior air of cavity and heat-barrier material, make the temperature in riser root run region and hold difference between the inner temperature of pipe to reduce, reduce because the temperature stress that excessive temperature differentials causes, improve the stressed of riser root, effectively avoid, because riser root run for a long time under high temperature action, produces high-temerature creep bearing capacity to decline, causing weld cracking; The inside of described riser arranges inner thermal insulation areas, utilize the thermal insulation function of air in inner thermal insulation areas, make equally the temperature in riser root run region and hold difference between the inner temperature of pipe to reduce, reduce because the temperature stress that excessive temperature differentials causes is improved the stressed of riser root.
A kind of hinge type expansion joint for high temperature pipe that the present invention proposes, inside and both sides at riser all arrange thermal insulation areas, utilize the thermal insulation function of air and heat-barrier material in thermal insulation areas, make the temperature in riser root run region and hold difference between the inner temperature of pipe to reduce, reduce because the temperature stress that excessive temperature differentials causes, improve the stressed of riser root, effectively avoid because of riser root run for a long time under high temperature action, produce high-temerature creep bearing capacity and decline, cause weld cracking; Ensure that riser and the attachment weld of end pipe no longer ftracture, and have improved the security of expansion joint operation.
Brief description of the drawings
Fig. 1 is the structural representation of high-temperature expansion joint in prior art.
Fig. 2 is structural representation of the present invention.
Fig. 3 is the B-B cutaway view of Fig. 2.
Fig. 4 is the A-A cutaway view Amplified image of Fig. 2.
In figure: 1, entrance point pipe, 2, riser, 3, ring flat-plate, 4, bellows, 5, port of export pipe, 6, reinforcement, 6, secondary flap, 8, main hinge plate, 9, bearing pin, 10, bearing pin back-up ring, 11, riser stiffener, 12. sidepiece thermal insulation areas, the 13. inner thermal insulation areas of risers, 14, saddle version.
Detailed description of the invention
With specific embodiment, the present invention is illustrated by reference to the accompanying drawings, still, the present invention is not limited to these embodiment.
As shown in Figure 2, Figure 3, Figure 4, a kind of hinge type expansion joint for high temperature pipe, described hinge type expansion joint includes bellows 4, entrance point pipe 1 and port of export pipe 5; Described bellows 4 is connected between entrance point pipe 1 and port of export pipe 2; Corresponding described bellows 4 its arranged outside have to retrain the flap structure of pressure thrust that bellows produces; Described flap structure includes main hinge plate 8 and secondary flap 7; Described secondary flap 7 is two that be arranged in parallel, and one end of two blocks of secondary flaps 7 is welded on the riser on entrance point pipe, is hinged with main hinge plate 8 between two blocks of described secondary flaps 7, and the riser on the other end of main hinge plate 8 and port of export pipe is welded to connect; The riser that is connected to flap structure two ends is welded on respectively on entrance point pipe 1 and port of export pipe 5; The both sides of described riser 2 are provided with the ring flat-plate 3 being welded on entrance point pipe 1, port of export pipe 5; The both sides of described ring flat-plate 3 are respectively arranged with riser stiffener 11 and reinforcement 6; The described riser stiffener 11, reinforcement 6 and the ring flat-plate 3 that are positioned at riser the same side connect and compose the sidepiece thermal insulation areas 12 of box-structure; In described sidepiece thermal insulation areas 12, be provided with air and heat-barrier material, utilize the thermal insulation function of the interior air of cavity and heat-barrier material, make the temperature in riser root run region and hold difference between the inner temperature of pipe to reduce, reduce because the temperature stress that excessive temperature differentials causes, improve the stressed of riser root, effectively avoid, because riser root run for a long time under high temperature action, produces high-temerature creep bearing capacity to decline, causing weld cracking; The inside of described riser arranges inner thermal insulation areas 13, utilize the thermal insulation function of air in inner thermal insulation areas, make equally the temperature in riser root run region and hold difference between the inner temperature of pipe to reduce, reduce because the temperature stress that excessive temperature differentials causes is improved the stressed of riser root.
Claims (1)
1. for a hinge type expansion joint for high temperature pipe, described hinge type expansion joint includes bellows (4), entrance point pipe (1) and port of export pipe (5); Described bellows (4) is connected between entrance point pipe (1) and port of export pipe (5); Corresponding described its arranged outside of bellows (4) has to retrain the flap structure of pressure thrust that bellows produces; The two ends of described flap structure are separately fixed on riser; The riser that is connected to flap structure two ends is welded on respectively on entrance point pipe (1) and port of export pipe (5); The both sides of described riser (2) are provided with the ring flat-plate (3) being welded on entrance point pipe (1), port of export pipe (5); It is characterized in that: the both sides of described ring flat-plate (3) are respectively arranged with riser stiffener (11); The described riser stiffener (11), reinforcement (6) and the ring flat-plate (3) that are positioned at riser the same side connect and compose the sidepiece thermal insulation areas (12) of box-structure; In described sidepiece thermal insulation areas (12), be provided with air and heat-barrier material, utilize the thermal insulation function of the interior air of cavity and heat-barrier material, make the temperature in riser root run region and hold difference between the inner temperature of pipe to reduce, reduce because the temperature stress that excessive temperature differentials causes, improve the stressed of riser root, effectively avoid, because riser root run for a long time under high temperature action, produces high-temerature creep bearing capacity to decline, causing weld cracking; The inside of described riser arranges inner thermal insulation areas (13), utilize the thermal insulation function of air in inner thermal insulation areas, make equally the temperature in riser root run region and hold difference between the inner temperature of pipe to reduce, reduce because the temperature stress that excessive temperature differentials causes is improved the stressed of riser root.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410533382.4A CN104358961B (en) | 2014-10-11 | 2014-10-11 | A kind of hinge type expansion joint for high temperature pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410533382.4A CN104358961B (en) | 2014-10-11 | 2014-10-11 | A kind of hinge type expansion joint for high temperature pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104358961A CN104358961A (en) | 2015-02-18 |
| CN104358961B true CN104358961B (en) | 2016-05-25 |
Family
ID=52526252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410533382.4A Active CN104358961B (en) | 2014-10-11 | 2014-10-11 | A kind of hinge type expansion joint for high temperature pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104358961B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110953429A (en) * | 2019-12-02 | 2020-04-03 | 秦皇岛市泰德管业科技有限公司 | Novel hinge expansion joint for high-temperature flue of flue gas turbine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2014564A (en) * | 1930-05-09 | 1935-09-17 | Pure Oil Co | Composite tube |
| JP2000257444A (en) * | 1999-03-04 | 2000-09-19 | Mitsubishi Heavy Ind Ltd | Nipple installation structure and high-temperature duct having the same, and exhaust system having the high- temperature duct |
| SE529741C2 (en) * | 2005-01-17 | 2007-11-13 | Sandvik Intellectual Property | Procedure for thermal insulation of weld joint and sleeve therefor |
| CN202972351U (en) * | 2012-11-28 | 2013-06-05 | 洛阳双瑞特种装备有限公司 | Simplex hinge-type expansion joint with specially strengthened structure |
| CN103925443A (en) * | 2013-01-13 | 2014-07-16 | 江苏贝特管件有限公司 | Single hinged type ripple compensator |
| CN204254128U (en) * | 2014-10-11 | 2015-04-08 | 洛阳双瑞特种装备有限公司 | A kind of hinge type expansion joint for high temperature pipe |
-
2014
- 2014-10-11 CN CN201410533382.4A patent/CN104358961B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104358961A (en) | 2015-02-18 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 471000 No.32 Binhe Road, Luoyang New Development Zone, Henan Province Patentee after: CSSC Shuangrui (Luoyang) special equipment Co.,Ltd. Address before: 471000 No.32 Binhe Road, Luoyang New Development Zone, Henan Province Patentee before: LUOYANG SUNRUI SPECIAL EQUIPMENT Co.,Ltd. |
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| CB03 | Change of inventor or designer information |
Inventor after: Zhang Aiqin Inventor before: Zhang Aiqin Inventor before: Cheng Jianmin |