CN101655177A - High-temperature resistant corrugated expansion joint - Google Patents
High-temperature resistant corrugated expansion joint Download PDFInfo
- Publication number
- CN101655177A CN101655177A CN200910182854A CN200910182854A CN101655177A CN 101655177 A CN101655177 A CN 101655177A CN 200910182854 A CN200910182854 A CN 200910182854A CN 200910182854 A CN200910182854 A CN 200910182854A CN 101655177 A CN101655177 A CN 101655177A
- Authority
- CN
- China
- Prior art keywords
- guide shell
- guide cylinder
- wall
- connecting pipe
- expansion joint
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 15
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 5
- 239000012774 insulation material Substances 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Joints Allowing Movement (AREA)
- Thermal Insulation (AREA)
Abstract
The invention discloses a high-temperature-resistant corrugated expansion joint which comprises a left connecting pipe, a corrugated pipe and a right connecting pipe which are sequentially and hermetically connected. The inner wall of the left connecting pipe is fixedly connected with a guide cylinder which is opened towards the right, the inner wall of the right connecting pipe is fixedly connected with an auxiliary guide cylinder which is opened towards the left, the inner diameter of the auxiliary guide cylinder which is shorter in length is larger than the outer diameter of the guide cylinder, and the inner diameter and the outer diameter of the auxiliary guide cylinder are coaxial and partially sleeved. The heat insulation material covered by the metal net cover is arranged in the gap between the outer wall of the guide cylinder and the auxiliary guide cylinder and the inner wall of the left connecting pipe, the corrugated pipe and the right connecting pipe. A sealing structure which is formed by a metal mesh cover sleeve heat insulation material and can axially move relatively is arranged between the sections where the guide cylinder and the auxiliary guide cylinder are sleeved. The invention is internally provided with the heat insulation structure, the corrugated pipe still keeps enough structural strength without being influenced by the temperature of the medium, normally plays the absorption or compensation role and ensures the safe operation of the matched pipeline.
Description
Technical field
The present invention relates to a kind of piping attachment, particularly a kind of pipe expansion joint.
Background technique
Steel making furnace is a kind of high temperature melting equipment, and its hot blast and flue gas efflux the pipeline work under bad environment, and pipeline produces corresponding expanding or compression deformation along with the fed sheet of a media temperature variation.Pipeline expands or compression deformation directly produces axial displacement and axial force, and these physical changes are to constitute one of pipe network instability, unsafe factor.Usually on the pipeline node location, expansion joint is set in the engineering, utilizes the plastic deformation characteristics of bellows, receive or compensate the axial displacement and the axial force of pipeline, directly improve the operation conditions of pipeline.Under the normal temperature operating mode, prior art products can be competent at working condition requirement fully, guarantees the safety of institute's distribution pipes.For the pipeline of fed sheet of a media greater than 1000 ℃, prior art products descends along with the temperature of fed sheet of a media increases gradually because of the intensity of flexible member bellows, until unstability, inefficacy.Prior art products is because of using at normal temperatures, and discomfort is combined into carries the pipeline of high temperature media supporting.
Summary of the invention
The present invention is primarily aimed at the shortcoming of prior art products non-refractory, proposes a kind of high-temperature resistant corrugated expansion joint with thermal insulation structure.This expansion joint is simple in structure, good heat-insulation effect, and bellows keeps design strength under worst hot case, and compensating movement is flexibly, reliably.
The present invention is achieved through the following technical solutions technical goal.
High-temperature resistant corrugated expansion joint, it comprises cylindrical shape left side adapter, bellows and right adapter that is tightly connected successively.Its improvements are: the fixedly connected guide shell towards right opening of described left nozzle inner wall, the fixedly connected secondary guide shell towards left opening of right nozzle inner wall, the short secondary guide shell internal diameter of length be greater than the guide shell external diameter, both coaxial and part fits.Gap between guide shell and secondary guide shell outer wall are to left side adapter, bellows and right nozzle inner wall, built-in thermal-protective material by the wire netting enclosure constitutes heat-insulating structure.Guide shell and secondary guide shell be mutually between the shrinking section, also is provided with by wire netting enclosure thermal-protective material to constitute the sealing configuration that can axially relatively move.
Thermal-protective material in the said structure is a kind of alumina-silicate ceramic fibre.At guide shell and the secondary guide shell stainless (steel) wire enclosure of the thermal-protective material between the shrinking section mutually, its right-hand member is by the annular boss block on the guide shell outer wall, and the boss height is greater than half of this gap.
The present invention compared with prior art has following good effect:
1, the bellows inwall is equipped with thermal-protective coating, and bellows is not directly influenced by the medium heat, still keeps design strength, still satisfies usage requirement under worst hot case.
2, guide shell and secondary guide shell mutually fit be the constituent element of heat-insulating structure, also be the constituent element of collocation structure, in the thermal insulation protection bellows, do not influence the nose balance motion.
3, at guide shell and secondary guide shell mutually between the shrinking section, the thermal-protective material that is provided with by the wire netting enclosure constitutes sealing configuration, and this structure had both limited medium and infiltrated, and prevented that also thermal-protective material is sucked out under negative pressure condition, had further promoted effect of heat insulation.
4, overall structure is simple, makes easily.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is an I place partial structurtes enlarged diagram among Fig. 1.
Embodiment
The invention will be further described with reference to the accompanying drawings below.
High-temperature resistant corrugated expansion joint shown in Figure 1 is used for the steel making furnace exhaust duct, and it comprises cylindrical shape left side adapter 1, bellows 8 and the right adapter 7 that is tightly connected successively.The fixedly connected guide shell 2 towards right opening of 1 inwall is taken on a described left side, and the right fixedly connected secondary guide shell 6 towards left opening of 7 inwalls of taking over, short secondary guide shell 6 internal diameters of length be greater than guide shell 2 external diameters, both coaxial and part fits.At guide shell 2 and secondary guide shell 6 shrinking section gap locations, be provided with by wire netting 4 enclosure thermal-protective materials 3 and constitute the sealing configuration that can axially relatively move, this structure is by annular boss 5 block on the guide shell 2 right-hand member outer walls, both stoped high temperature media infiltration in the pipeline, prevented also that thermal-protective material was sucked out under negative pressure condition.Be provided with two seals in the present embodiment, have better seal and mobility.The right side is taken over 1 in guide shell 2 and secondary guide shell 6 outer wall, bellows 8 and right take over 7 between the gap, liner constitutes heat-insulating structure by the thermal-protective material 3 of the wire netting enclosure, utilize thermal-protective material 3 to stop the heat of medium to conduct, guarantee that bellows 8 is not overheated to bellows 8.Wire netting 4 materials in the present embodiment are stainless steels, and thermal-protective material 3 is a kind of alumina-silicate ceramic fibres.
When the present invention uses, the temperature of pipeline internal medium is stopped by heat-insulating structure, and bellows 8 is given in non-conducting, and bellows 8 can overheatedly still not keep enough structural strengths, the effect of pipeline axial displacement and axial force is received or is compensated in normal performance, guarantees the safe operation of institute's distribution pipes.
Claims (3)
1, a kind of high-temperature resistant corrugated expansion joint, it comprises cylindrical shape left side adapter (1), bellows (8) and right take over (7) that are tightly connected successively; It is characterized in that: the fixedly connected guide shell towards right opening of (1) inwall (2) is taken on a described left side, the right fixedly connected secondary guide shell (6) of (7) inwall of taking over towards left opening, short secondary guide shell (6) internal diameter of length is greater than guide shell (2) external diameter, both coaxial and part fits; At guide shell (2) and secondary guide shell (6) outer wall (1), bellows (8) and right gap between (7) inwall, built-in thermal-protective material by the wire netting enclosure (3) the formation heat-insulating structure taken over are taken in a left side; Guide shell (2) and secondary guide shell (6) be mutually between the shrinking section, also is provided with by wire netting (4) enclosure thermal-protective material (3) to constitute the sealing configuration that can axially relatively move.
2, high-temperature resistant corrugated expansion joint according to claim 1 is characterized in that: described thermal-protective material (3) is a kind of alumina-silicate ceramic fibre.
3, high-temperature resistant corrugated expansion joint according to claim 1 is characterized in that: described guide shell (2) right output port outer wall is provided with annular boss (5), and boss (5) height is greater than guide shell (2) and secondary guide shell (6) half of the intersegmental crack of fit mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910182854A CN101655177A (en) | 2009-09-08 | 2009-09-08 | High-temperature resistant corrugated expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910182854A CN101655177A (en) | 2009-09-08 | 2009-09-08 | High-temperature resistant corrugated expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101655177A true CN101655177A (en) | 2010-02-24 |
Family
ID=41709583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910182854A Pending CN101655177A (en) | 2009-09-08 | 2009-09-08 | High-temperature resistant corrugated expansion joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101655177A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006352A (en) * | 2017-12-31 | 2018-05-08 | 湖南长城科技有限公司 | Burner hearth high-temp waste gas conveyance conduit anticracking break structure and its combustion furnace |
| CN109751472A (en) * | 2019-01-28 | 2019-05-14 | 秦皇岛市泰德管业科技有限公司 | A kind of high temperature high voltage resistant flexibility heat insulation structural and expansion joint |
-
2009
- 2009-09-08 CN CN200910182854A patent/CN101655177A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006352A (en) * | 2017-12-31 | 2018-05-08 | 湖南长城科技有限公司 | Burner hearth high-temp waste gas conveyance conduit anticracking break structure and its combustion furnace |
| CN109751472A (en) * | 2019-01-28 | 2019-05-14 | 秦皇岛市泰德管业科技有限公司 | A kind of high temperature high voltage resistant flexibility heat insulation structural and expansion joint |
| CN109751472B (en) * | 2019-01-28 | 2024-03-15 | 秦皇岛市泰德管业科技有限公司 | High-temperature-resistant high-pressure-resistant flexible heat insulation structure and expansion joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100224 |