CN201599527U - Corrugated pipe expansion joint and corrugated pipe thereof - Google Patents
Corrugated pipe expansion joint and corrugated pipe thereof Download PDFInfo
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- CN201599527U CN201599527U CN2009202896282U CN200920289628U CN201599527U CN 201599527 U CN201599527 U CN 201599527U CN 2009202896282 U CN2009202896282 U CN 2009202896282U CN 200920289628 U CN200920289628 U CN 200920289628U CN 201599527 U CN201599527 U CN 201599527U
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- bellows
- expansion joint
- corrugated pipe
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- film layer
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Abstract
The utility model discloses a corrugated pipe expansion joint and a corrugated pipe thereof, wherein the corrugated pipe expansion joint comprises end pipes, the corrugated pipe connected between the two end pipes and a guide cylinder connected with an inner cavity of the corrugated pipe. The corrugated pipe comprises a stainless steel outer layer, a metal inner layer and a nonmetal thin film layer which is clamped between the stainless steel outer layer and the metal inner layer. The corrugated pipe expansion joint has high use efficiency, long service life and low cost, and is suitable for promotion and application.
Description
Technical field
It is technical field that the utility model relates to gas conveying tube, relates in particular to a kind of bellows expansion joint and bellows thereof.
Background technique
At present, bellows expansion joint is widely used in being used for compensating pipeline or equipment and causing the displacement of expanding with heat and contract with cold because of temperature effect in metallurgy high furnace gas transportation system, coke-stove gas transporting system and the coal gas of converter transporting system, and the assurance security of system is worked reliably.Bellows expansion joint is the compensator of conveyance conduit, and bellows then is the compensating element of expansion joint.The bellows that existing pipeline adopts Austenitic Stainless Steel to make with metal corrugated pipe expansion joint more is to bear big working pressure.Yet, because the stressed at work effect of bellows can cause bellows unstability or damage.And stress corrosion takes place in this kind bellows easily, can within a short period of time fracture damage take place, and causes bellows gas leakage, leakage, greatly reduces the working life and the working efficiency of bellows expansion joint.If adopt other made bellows, though can increase the service life, manufacture cost is high, is unsuitable for applying.Therefore, demand urgently providing a kind of improved bellows expansion joint and bellows thereof to overcome above-mentioned defective.
The model utility content
The bellows expansion joint and the bellows thereof that provide a kind of utilization efficiency height, long service life and cost low is provided the technical problems to be solved in the utility model.
In order to solve the problems of the technologies described above, the utility model provides a kind of bellows expansion joint, comprises end pipe, is connected in the bellows between the pipe of two ends and is connected the guide shell of described bellows inner chamber.Described bellows comprises stainless steel skin, metal internal layer and nonmetal film layer, and described nonmetal film layer is located between described stainless steel skin and the described metal internal layer.
The utility model also provides a kind of bellows that is used for expansion joint, comprises stainless steel skin, metal internal layer and nonmetal film layer, and described nonmetal film layer is located between described stainless steel skin and the described metal internal layer.
Compared with prior art, the bellows of bellows expansion joint of the present utility model adopts three-decker, be stainless steel skin, metal internal layer and be clipped between the two nonmetal film layer, this structure can bellows is total stress level reduce, effectively prevent the generation of stress corrosion cracking, and then improved the working life and the utilization efficiency of bellows expansion joint, reduce cost.
Preferably, the internal surface of described metal internal layer is coated with the anticorrosive paint layer, with its antiseptic property of further reinforcement.
By following description also in conjunction with the accompanying drawings, it is more clear that the utility model will become, and these accompanying drawings are used to explain embodiment of the present utility model.
Description of drawings
Fig. 1 is an embodiment's of the utility model bellows expansion joint a structural representation.
Fig. 2 is the local enlarged diagram of the bellows of bellows expansion joint shown in Figure 1.
Embodiment
With reference now to accompanying drawing, describe embodiment of the present utility model, the similar elements label is represented similar elements in the accompanying drawing.As mentioned above, the utility model provides a kind of utilization efficiency height, long service life and the low bellows expansion joint of cost.
Elaborate the utility model embodiment's technological scheme below in conjunction with accompanying drawing.As shown in Figure 1, the bellows expansion joint of present embodiment comprises end pipe 1, is connected in the guide shell 3 that two ends are managed the bellows 2 between 1 and are connected in bellows 2 inner chambers.
Fig. 2 is the local structure for amplifying schematic representation of the bellows of bellows expansion joint shown in Figure 1.As shown in the figure, the bellows 2 of present embodiment comprises stainless steel skin 21, nonmetal film layer 22 and metal internal layer 23, and described nonmetal film layer 22 is located between described stainless steel outer 21 and the described metal internal layer 23.
As preferred embodiment of the present utility model, aforementioned stainless steel outer 21 is an Austenitic Stainless Steel SUS316L layer, to satisfy the requirement of bearing working pressure.Aforementioned metal internal layer 23 can be the ordinary low-carbon steel layer, and it can make the total stress level of internal layer descend, and delays stress corrosion speed, plays etch-proof effect.In addition, generally speaking, this sheet material can directly be used under supply of material state without heat treatment, and its good welding performance, plasticity, good toughness.Aforementioned nonmetal film layer 22 can be polytetrafluoroethylene film, and it has outstanding high temperature resistance and chemical stability, can effectively improve the anti-corrosion allowance of bellows.
The previous corrugated pipe adopts the different material combination of multilayer, be stainless steel skin, metal internal layer and be clipped between the two nonmetal film layer, the bellows of this structure is difficult for producing intergranular corrosion and pitting corrosion, simultaneously because stress levels overall decline, prevented the caused corrosion cracking of stress corrosion, and then improved the utilization efficiency and the working life of bellows expansion joint.This bellows expansion joint is mainly used in blast furnace, coke oven, converter gas pipeline system.
Preferably, described metal internal layer 23 internal surfaces are coated with anticorrosive paint layer 24, with its antiseptic property of further reinforcement.
More than be example with the axialmode bellows expansion joint, describe the concrete structure of the utility model bellows expansion joint in detail, but not as limit, the bellows of present embodiment also can be used for the bellows expansion joint of types such as compound pull rod type, universal coupling type, pressure-balancing type.
Above disclosed only is the utility model preferred embodiment, can not limit the interest field of the utility model certainly with this, and therefore the equivalent variations of being done according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (7)
1. bellows expansion joint, comprise end pipe, be connected in the bellows between the pipe of two ends and be connected the guide shell of described bellows inner chamber, described bellows comprises the stainless steel skin, it is characterized in that, described bellows also comprises metal internal layer and nonmetal film layer, and described nonmetal film layer is located between described stainless steel skin and the described metal internal layer.
2. bellows expansion joint according to claim 1 is characterized in that the internal surface of described metal internal layer is coated with the anticorrosive paint layer.
3. bellows expansion joint according to claim 2 is characterized in that, described nonmetal film layer is the polytetrafluoroethylene film layer.
4. according to claim 1 or 2 or 3 described bellows expansion joints, it is characterized in that described metal internal layer is the low carbon steel layer.
5. a bellows that is used for expansion joint comprises the stainless steel skin, it is characterized in that, described bellows also comprises metal internal layer and nonmetal film layer, and described nonmetal film layer is located between described stainless steel skin and the described metal internal layer.
6. bellows according to claim 5 is characterized in that the internal surface of described metal internal layer is coated with the anticorrosive paint layer.
7. bellows according to claim 6 is characterized in that, described nonmetal film layer is the polytetrafluoroethylene film layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202896282U CN201599527U (en) | 2009-12-29 | 2009-12-29 | Corrugated pipe expansion joint and corrugated pipe thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202896282U CN201599527U (en) | 2009-12-29 | 2009-12-29 | Corrugated pipe expansion joint and corrugated pipe thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201599527U true CN201599527U (en) | 2010-10-06 |
Family
ID=42810583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202896282U Expired - Fee Related CN201599527U (en) | 2009-12-29 | 2009-12-29 | Corrugated pipe expansion joint and corrugated pipe thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201599527U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438300A (en) * | 2013-09-16 | 2013-12-11 | 江苏桂铭机械有限公司 | Special corrugated pipe for coal gas pipelines |
| CN103438318A (en) * | 2013-09-16 | 2013-12-11 | 海安县荣圣机械制造有限公司 | Novel seal corrugated pipe |
-
2009
- 2009-12-29 CN CN2009202896282U patent/CN201599527U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438300A (en) * | 2013-09-16 | 2013-12-11 | 江苏桂铭机械有限公司 | Special corrugated pipe for coal gas pipelines |
| CN103438318A (en) * | 2013-09-16 | 2013-12-11 | 海安县荣圣机械制造有限公司 | Novel seal corrugated pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101006 Termination date: 20171229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |