CN206592696U - A kind of corrosion-resistant bellows expansion joint of middle cryogenic pipelines - Google Patents
A kind of corrosion-resistant bellows expansion joint of middle cryogenic pipelines Download PDFInfo
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- CN206592696U CN206592696U CN201720170232.0U CN201720170232U CN206592696U CN 206592696 U CN206592696 U CN 206592696U CN 201720170232 U CN201720170232 U CN 201720170232U CN 206592696 U CN206592696 U CN 206592696U
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- corrosion
- bellows
- layer
- expansion joint
- bellows expansion
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Abstract
The utility model discloses a kind of middle corrosion-resistant bellows expansion joint of cryogenic pipelines, the bellows expansion joint includes flange, is fixedly connected with pipe and bellows, and the bellows is connected by being fixedly connected with pipe with flange；The bellows is set to five-layer structure, anti-corrosion macromolecule membranous layer, internal non-corrosive metal (NCM) layer, internal scale resin corrosion-inhibiting coating, outer metal layer and outside water-tight corrosion-proof coating are followed successively by from inside to outside, recess is present in interlayer, the interlayer for solid dye layer in bellows between the internal non-corrosive metal (NCM) layer and internal scale resin corrosion-inhibiting coating.The utility model improves the antiseptic property of bellows expansion joint by improving bellows expansion joint structure, and increases solid dye layer, the security that bellows can be pointed out to be used by extent of corrosion, increase bellows in the structure.
Description
Technical field
The utility model is related to a kind of bellows expansion joint, and more particularly to a kind of corrosion-resistant bellows of middle cryogenic pipelines is swollen
Swollen section.
Background technology
Bellows expansion joint is widely used in oil, electric power, chemical industry as a kind of pipeline compensator with its excellent performance
Deng industrial circle.But bellows expansion joint often in states such as inclination, bending, distortion, compression and stretchings, causes ripple at work
Line pipe expansion joint is easy to aging, and the medium conveyed in this outward corrugated tube is no lack of the material that is corrosive, and more exacerbates bellows expansion
That saves is easy to degree of aging.Application No. CN201520037390 patent discloses a kind of corrosion-resistant bellows of middle cryogenic pipelines
Expansion joint, including bellows, bellows both sides are provided with the inside of end pipe, bellows and are additionally provided with mozzle, and its bellows is four
Rotating fields, from internal layer to outer layer, set gradually as simple metal internal layer, intermediate course, intermediate layer and outer layer, intermediate course is high score
Sub- film intermediate course, intermediate layer is 254SMo intermediate layers or Incoloy825 intermediate layers, and outer layer is 316L stainless steel outer layers, pure
Internal anticorrosion coat is additionally provided with the inside of inner metallic layer.Although technical scheme can increase bellows expansion joint disclosed in the patent
Corrosion resistance, but the extent of corrosion of bellows can not be rationally embodied, and there is stripping in pumped (conveying) medium in the coating that internal layer is used
Situations such as, reduce the Corrosion Protection of bellows.
Utility model content
The utility model is proposed based on above-mentioned technical problem, is improved by the structure to bellows expansion joint, using not
Easily peelable internal layer, and by increasing solid dye layer in structure, pointed out bellows by extent of corrosion, increase bellows makes
Security.
In order to solve the above technical problems, the utility model is as follows using technical scheme：
A kind of corrosion-resistant bellows expansion joint of middle cryogenic pipelines, the bellows expansion joint includes flange, is fixedly connected with pipe
And bellows, the bellows is connected by being fixedly connected with pipe with flange；The bellows is set to five-layer structure, from inside to outside
It is followed successively by anti-corrosion macromolecule membranous layer, internal non-corrosive metal (NCM) layer, internal scale resin corrosion-inhibiting coating, outer metal layer and outside waterproof
Corrosion-inhibiting coating, in bellows there is interlayer in recess between internal the non-corrosive metal (NCM) layer and internal scale resin corrosion-inhibiting coating,
Filled with solid dye layer in the interlayer.
Further, the anti-corrosion macromolecule membranous layer is poly tetrafluoroethylene.
Further, the internal non-corrosive metal (NCM) layer is ferritic stainless steel.
Further, the internal scale resin corrosion-inhibiting coating is organosilicon flake anticorrosive paint layer.
Further, the outer metal layer is 316L stainless steel layers.
Further, the outside water-tight corrosion-proof coating is modified acroleic acid epoxy coating.
Compared with prior art, bellows expansion joint of the present utility model uses five-layer structure, and internal layer uses anti-corrosion high score
Sub- film, solves the problems, such as the coating stripping that exists in application coating, and using anti-corrosion polymeric membrane have in itself it is hydrophobic, resistance to
Low-temperature characteristics, can also be used for cryogenic media in conveying while antiseptic effect is reached；Using anti-corrosion gold under anti-corrosion polymeric membrane
Belong to layer as second layer anticorrosion structure, support and secondary antisepsis are played to anti-corrosion polymeric membrane；To the pipe expansion joint that ripples
The internal scale resin corrosion-inhibiting coating of outer metal layer both sides increase of main functionality and outside water-tight corrosion-proof coating, to ensure externally
The anti-corrosion protection of portion's metal level；Set in bellows between the inside non-corrosive metal (NCM) layer and internal scale resin corrosion-inhibiting coating of recess
Interlayer is put, the filled solid dye coating in interlayer, after the inside non-corrosive metal (NCM) layer of bellows herein is destroyed, solid dye layer
It is dispersed in pumped (conveying) medium, by, by extent of corrosion, reaching forewarning function to medium dyeing prompting bellows, improving bellows
The security used.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is close-up schematic view of the present utility model；
Fig. 3 is the enlarged diagram of recess in the utility model bellows.
Embodiment
In order that the purpose of this utility model, technical scheme and beneficial effect are more clearly understood, below in conjunction with accompanying drawing and
Specific embodiment, the middle corrosion-resistant bellows expansion joint of cryogenic pipelines a kind of to the utility model is described in detail.Retouch in this place
The specific embodiment stated only to explain the utility model, is not used to limit the utility model.
Fig. 1 is structural representation of the present utility model, a kind of middle corrosion-resistant bellows expansion joint of cryogenic pipelines, including flange
1st, pipe 2 and bellows 3 are fixedly connected with, bellows is connected by being fixedly connected with pipe 2 with flange 1；Fig. 2 is part of the present utility model
Enlarged diagram, bellows is set to five-layer structure, be followed successively by from inside to outside poly tetrafluoroethylene 33, ferritic stainless steel 34,
Organosilicon flake anticorrosive paint layer 35,316L stainless steel layers 31 and modified acroleic acid epoxy coating 32, ferritic stainless steel
Recess is present in interlayer, the interlayer filled with solid dye in bellows between 34 and organosilicon flake anticorrosive paint layer 35
Layer 36.
The utility model is mainly reached anti-using poly tetrafluoroethylene 33 and ferritic stainless steel 34 as internal corrosion-resistant coating
Rotten effect, poly tetrafluoroethylene 33 both has polytetrafluoroethylene (PTFE) water-tight corrosion-proof, low temperature resistant characteristic, and because it is whole as one
Body, solves and applies spallation problems caused by coating in the prior art；Ferritic stainless steel 34 is served to poly- four with its characteristic
PVF is supported and the effect of secondary corrosion-resistant.
It is bellows agent structure layer using 316L stainless steel layers 31, organosilicon is set in the both sides of 316L stainless steel layers 31
Flake anticorrosive paint layer 35 and modified acroleic acid epoxy coating 32, anti-corrosion protection are carried out to 316L stainless steel layers, particularly
Organosilicon flake anticorrosive paint layer 35, high cohesive force, excellent corrosion-resistant and ageing resistace due to such scale resin, poly-
Also can the progress of 316L stainless steel layers 31 anti-corrosion topmost to bellows after tetrafluoroethylene 33 and the breakage of ferritic stainless steel 34
Protection.
Recess usually affected by force in bellows, often in stretching or compressive state, and it is more to flow through medium, most easily old
Change by corruption.By sandwich establishment between ferritic stainless steel 34 here and organosilicon flake anticorrosive paint layer 35, and at it
Middle placement solid dye layer reaches is carried out forewarning function to bellows expansion joint by rotten situation.When the He of poly tetrafluoroethylene 33 herein
When ferritic stainless steel 34 has all been subjected to corroding and damaging, the solid dye layer in interlayer can be broken up by media flow, dyestuff point
Dissipate in media as well, medium is changed colour.Staff's ferritic stainless steel 34 is pointed out to be subjected to corrosion by the discoloration of medium broken
Damage, and then avoid as bellows agent structure layer 316L stainless steel layers 31 by corrosion attack, while can be by simply more
Change poly tetrafluoroethylene 33 and ferritic stainless steel 34 reaches maintenance to bellows expansion joint, improve making for bellows expansion joint
With safety.
Claims (6)
1. a kind of corrosion-resistant bellows expansion joint of middle cryogenic pipelines, it is characterised in that the bellows expansion joint includes flange, consolidated
Determine connecting tube and bellows, the bellows is connected by being fixedly connected with pipe with flange；The bellows is set to five-layer structure,
Be followed successively by from inside to outside anti-corrosion macromolecule membranous layer, internal non-corrosive metal (NCM) layer, internal scale resin corrosion-inhibiting coating, outer metal layer and
Outside water-tight corrosion-proof coating, recess is deposited in bellows between internal the non-corrosive metal (NCM) layer and internal scale resin corrosion-inhibiting coating
It is solid dye layer in the interlayer in interlayer.
2. a kind of middle corrosion-resistant bellows expansion joint of cryogenic pipelines according to claim 1, it is characterised in that the anti-corrosion
Macromolecule membranous layer is poly tetrafluoroethylene.
3. a kind of middle corrosion-resistant bellows expansion joint of cryogenic pipelines according to claim 1, it is characterised in that the inside
Non-corrosive metal (NCM) layer is ferritic stainless steel.
4. a kind of middle corrosion-resistant bellows expansion joint of cryogenic pipelines according to claim 1, it is characterised in that the inside
Scale resin corrosion-inhibiting coating is organosilicon flake anticorrosive paint layer.
5. a kind of middle corrosion-resistant bellows expansion joint of cryogenic pipelines according to claim 1, it is characterised in that the outside
Metal level is 316L stainless steel layers.
6. a kind of middle corrosion-resistant bellows expansion joint of cryogenic pipelines according to claim 1, it is characterised in that the outside
Water-tight corrosion-proof coating is modified acroleic acid epoxy coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720170232.0U CN206592696U (en) | 2017-02-23 | 2017-02-23 | A kind of corrosion-resistant bellows expansion joint of middle cryogenic pipelines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720170232.0U CN206592696U (en) | 2017-02-23 | 2017-02-23 | A kind of corrosion-resistant bellows expansion joint of middle cryogenic pipelines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206592696U true CN206592696U (en) | 2017-10-27 |
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ID=60126214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720170232.0U Expired - Fee Related CN206592696U (en) | 2017-02-23 | 2017-02-23 | A kind of corrosion-resistant bellows expansion joint of middle cryogenic pipelines |
Country Status (1)
| Country | Link |
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| CN (1) | CN206592696U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107830018A (en) * | 2017-12-05 | 2018-03-23 | 苏州瑞恩工业产品设计有限公司 | A kind of flexible connector |
-
2017
- 2017-02-23 CN CN201720170232.0U patent/CN206592696U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107830018A (en) * | 2017-12-05 | 2018-03-23 | 苏州瑞恩工业产品设计有限公司 | A kind of flexible connector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171027 Termination date: 20180223 |