CN2031056U - Expanding section - Google Patents
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- Publication number
- CN2031056U CN2031056U CN 88204783 CN88204783U CN2031056U CN 2031056 U CN2031056 U CN 2031056U CN 88204783 CN88204783 CN 88204783 CN 88204783 U CN88204783 U CN 88204783U CN 2031056 U CN2031056 U CN 2031056U
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- CN
- China
- Prior art keywords
- bellows
- pipe
- flexible
- expansion joint
- pipeline
- 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.)
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Abstract
The utility model relates to a pipeline rated displacement absorbing device, which is mainly used for the gas pipeline, the exhaust pipeline, and the hot air pipeline. The utility model is composed of a corrugate pipe, an inner sleeve pipe in the corrugate pipe, a seamless steel pipe welded at both ends of the corrugate pipe and flanges, wherein, the corrugate pipe is formed by welding telescopic single pieces. With the change of the composition of the corrugate pipe in the prior art, not only the service life is prolonged, but also the production cost is greatly reduced.
Description
The utility model relates to a kind of device of extraction duct rated displacement, mainly is used on combustion gas, exhaust and the hot-air duct.
Usually is to bend the extraction duct rated displacement in the pipeline, but it needs to support with supporting frame when setting up aerial pipes, when the laying under ground piping, need enlarge trench, for constructing and piping erection is made troubles by expansions.Though have a kind of corrugated stainless steel tubing expansion bend can overcome above deficiency at present, but the cost of this bellows expansion bend has surpassed the curved cost that expands out and away, because the weld seam of stainless steel expansion bend is positioned at flexible position, so in use weld seam also is subjected to certain influence, make reduce working life.
The purpose of this utility model is in order to provide a kind of cost low, long service life, the simple expansion joint of technology.
The utility model is finished as follows, and expansion joint is made up of at seamless steel pipe, the flange at bellows two ends bellows, the inner sleeve that is positioned at bellows and welding-on.Wherein, bellows is formed stretchable sheet by the outer pressure-bearing end points butt welding of two flexible monolithics, with pressure-bearing end points butt welding in two adjacent stretchable sheets together, forms a complete bellows then, can make weld seam not be positioned at flexible position like this, thereby improve the working life of expansion joint.Bellows selects for use carbon steel, corrosion resistant plate all can.
In conjunction with the accompanying drawings concrete structure of the present utility model is elaborated below by embodiment.
Accompanying drawing 1 is a structural representation of the present utility model.
Accompanying drawing 2 is the concrete structure figure of the flexible monolithic of the utility model.
Expansion joint is made up of bellows, inner sleeve (4), two seamless steel pipes (2), two methods (1), and wherein bellows is made up of flexible monolithic (5).
During manufacturing, at first Carbon Steel Plate being struck out sidewall is the flexible monolithic (5) of S type, then, outer pressure-bearing end points (6) butt welding of two flexible monolithics (5) are got up (use the seam welding machine roll welding) composition stretchable sheet (3) again with interior pressure-bearing end points (7) welding-on of adjacent two stretchable sheets (5) together, form a complete bellows.After preservative treatment, its two ends add the inner sleeve (4) that weldering seamless steel pipe (2) and flange (1) will conform to pipeline at last to be put in the bellows, and one end and flange weld together, and promptly become complete expansion joint.
The utility model is compared not only with the flexible device of existing corrugated stainless steel tubing, and can prolong one times than the flexible device of corrugated stainless steel tubing service life, and bellows adopts corrosion resistant plate can make cost reduce by 80%, after tested: the flexible number of times of the flexible device of corrugated stainless steel tubing generally will burst apart at flexible 2000 left and right sides weld seams because of the impact that is subjected to weld seam, and this expansion joint is owing to changed the composition structure of former bellows, its flexible position is not subjected to the impact of weld seam, and flexible number of times can be reached 5000 times.
Claims (3)
1, a kind of expansion joint, form by bellows, inner sleeve (4) and with the seamless steel pipe (2) and the flange (1) of the welding of bellows two ends, it is characterized in that bellows by forming stretchable sheet (3), form by interior pressure-bearing end points (7) welding-on of two adjacent stretchable sheets (3) more together through outer pressure-bearing end points (6) butt welding of stamping forming two flexible monolithics (5).
2, expansion joint according to claim 1 is characterized in that the sidewall of flexible monolithic (5) is the S type.
3, expansion joint according to claim 1 is characterized in that bellows makes with carbon steel or corrosion resistant plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88204783 CN2031056U (en) | 1988-04-24 | 1988-04-24 | Expanding section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88204783 CN2031056U (en) | 1988-04-24 | 1988-04-24 | Expanding section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2031056U true CN2031056U (en) | 1989-01-18 |
Family
ID=4839314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88204783 Pending CN2031056U (en) | 1988-04-24 | 1988-04-24 | Expanding section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2031056U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364199A (en) * | 2011-11-01 | 2012-02-29 | 中国矿业大学 | Dish pipeline compensator |
| CN106051366A (en) * | 2015-04-11 | 2016-10-26 | 江苏苏创管业科技有限公司 | Reinforced deviation rectifying roller expansion joint |
| CN106051364A (en) * | 2015-04-08 | 2016-10-26 | 江苏海达电气有限公司 | Anti-fatigue GIS corrugated pipe compensator |
| CN106051363A (en) * | 2016-04-27 | 2016-10-26 | 南通三创机械制造有限公司 | Fiber compensator |
| CN111255970A (en) * | 2020-03-06 | 2020-06-09 | 邓明洋 | Axial expansion joint |
-
1988
- 1988-04-24 CN CN 88204783 patent/CN2031056U/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364199A (en) * | 2011-11-01 | 2012-02-29 | 中国矿业大学 | Dish pipeline compensator |
| CN106051364A (en) * | 2015-04-08 | 2016-10-26 | 江苏海达电气有限公司 | Anti-fatigue GIS corrugated pipe compensator |
| CN106051366A (en) * | 2015-04-11 | 2016-10-26 | 江苏苏创管业科技有限公司 | Reinforced deviation rectifying roller expansion joint |
| CN106051363A (en) * | 2016-04-27 | 2016-10-26 | 南通三创机械制造有限公司 | Fiber compensator |
| CN111255970A (en) * | 2020-03-06 | 2020-06-09 | 邓明洋 | Axial expansion joint |
| CN111255970B (en) * | 2020-03-06 | 2021-12-24 | 山东恒通膨胀节制造有限公司 | Axial expansion joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned | ||
| WD01 | Invention patent application deemed withdrawn after publication |