CN104266028A - Instability preventing type expansion joint of metal corrugated pipe - Google Patents
Instability preventing type expansion joint of metal corrugated pipe Download PDFInfo
- Publication number
- CN104266028A CN104266028A CN201410495317.7A CN201410495317A CN104266028A CN 104266028 A CN104266028 A CN 104266028A CN 201410495317 A CN201410495317 A CN 201410495317A CN 104266028 A CN104266028 A CN 104266028A
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- CN
- China
- Prior art keywords
- corrugated pipe
- ring
- expansion joint
- sheath
- metal corrugated
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Classifications
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- 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
- F16L51/025—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with several corrugations
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention relates to an instability preventing type expansion joint of a metal corrugated pipe, and belongs to the technical field of liquid conveying pipelines. The product comprises the metal corrugated pipe of which two ends are respectively connected with circular connecting pipes; a sheath is mounted to the outside of the metal corrugated pipe; a reinforcing ring is lined between outer adjacent corrugated parts of the metal corrugated pipe; the sheath comprises an inner sheath which is spirally coiled outside the reinforcing rings through a belt, and an outer sheath which is reversely rotated and coiled outside the inner sheath; both the inner sheath and the outer sheath are respectively equipped with spiral intervals; two ends of the outer sheaths are respectively fixedly connected with the reinforcing rings at two ends through the inner sheath, and the reinforcing rings at two ends are respectively fixedly connected with the inner end surfaces of corresponding ring plates; inner holes of the ring plates are fixedly connected with the connecting pipes. With the adoption of the instability preventing type expansion joint of the metal corrugated pipe, the phenomenon of cylindrical instability of the expansion joint type corrugated pipe under a high-pressure state and/ or suffering from a large deformation can be effectively avoided; meanwhile, the problem due to unexpected fatigue rupture of the expansion caused by non-uniform deforming of the corrugated pipe can be effectively avoided, and the pipeline system can be operated normally for a long term.
Description
Technical field
The present invention relates to a kind of expansion joint, especially a kind of anti-unstability metal corrugated pipe expansion joint, this expansion joint can carry out axially, radial direction, angle are out of shape and composite deformation, for the displacement compensating institute's connecting tube or equipment, belongs to technical field of fluid transportation pipelines.
Background technique
When bearing interior pressure, there is Pole-shape unstability deformation tendency in metal corrugated pipe expansion joint, bellows its post unstability under deformation can make allowable pressure decline simultaneously, therefore needs the behave taking suppressed column unstability, to improve the bearing capacity of expansion joint during design.
According to the applicant understood, for a long time, improve the measure of post unstability allowable pressure for reducing bellows wave height, reducing wave number or increase wall thickness etc., these measures all can weaken bellows deformability, reduce its fatigue life.In addition, existing metal corrugated pipe expansion joint is also standing is equipped with overcoat, but its effect is only and avoids bellows outer damage, inoperative to enhancing stability.
Summary of the invention
The object of the invention is to: for above-mentioned prior art Problems existing, propose one and can not only effectively avoid bellows Pole-shape unstability, and substantially do not weaken the anti-unstability metal corrugated pipe expansion joint of its deformability, thus while guarantee expansion joint bearing capacity, keep its deformability and fatigue life, ensure that expansion joint runs reliably and with long-term.
In order to reach above object, anti-unstability metal corrugated pipe expansion joint of the present invention comprises the metal bellows that two ends connect circular adapter respectively, outside described metal bellows, sheath is housed; Its improvements are, enhancing ring is lined with between adjacent corrugations outside described metal bellows, the cross section of described enhancing ring is by extending the T-shaped inserting muscle in the middle part of straight outer shroud inwardly, described straight bore diameter of outer ring is greater than the external diameter of described metal bellows, and between the straight outer shroud of adjacent enhancing ring, there is ring distance, the inner shape of described insertion muscle and described metal bellows trough matching form, and be gradually-reducing shape by the inner towards straight outer shroud; Described sheath comprises the inner sheath that is spirally wound on and strengthens outside ring and is wrapped in the oversheath outside inner sheath with contrary rotation direction, and described inner sheath and oversheath have spiral spacer respectively; The two ends of described oversheath are connected respectively by the enhancing ring at inner sheath and two ends, and the enhancing ring at described two ends is connected with corresponding ring flat-plate interior edge face respectively, and endoporus and the adapter of described ring flat-plate are connected.
In work, the unstable active force of the column of metal corrugated pipe expansion joint under interior pressure effect is delivered on inner sheath and oversheath by the enhancing ring between ripple, and effective effect of contraction is played in the contrary interior oversheath coupled columns shape instability distortion of Hand of spiral, the Pole-shape unstability of bellows therefore can be stopped.Meanwhile, because interior oversheath is in the loose ring spring structure with spiral spacer, therefore can realize the deform in same pace with bellows, compensate axial, radial, angle and the compound displacement of external pipe or equipment.In a word, the present invention can effectively avoid swelling red sandstone high pressure conditions or (with) Pole-shape unstability phenomenon after large deformation; Meanwhile, bellows effectively can be avoided to be out of shape the unexpected problem of fatigue damage of the uneven expansion joint caused, keep pipe-line system normally to run for a long time.
Further, the enhancing ring outer end at two ends is planar end surface.
Further again, described planar end surface to be welded with the interior edge face of corresponding ring flat-plate by baffle rings and is connected.
Further again, described inner sheath and oversheath adopt band to be wound around respectively, and described spiral spacer is less than strip width.
Further, described spiral spacer is less than the ring distance strengthening ring.
accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is the partial enlargement structural representation of Fig. 1.
Embodiment
Embodiment one
The anti-unstability metal corrugated pipe expansion joint of the present embodiment, as shown in accompanying drawing 1,2, comprises the metal bellows 1 that two ends are welded with circle adapter 2 respectively.Be lined with between adjacent corrugations outside metal bellows 1 and strengthen ring 3.The cross section strengthening ring 3 is that straight bore diameter of outer ring is greater than the external diameter of metal bellows 1, and has ring distance between the straight outer shroud of adjacent enhancing ring 3 by extending the T-shaped inserting muscle in the middle part of straight outer shroud inwardly.Insert the inner shape of muscle and the matching form of metal bellows 1 trough, in circular arc head, it towards straight outer shroud convergent by inner circular arc head, therefore only being formed and supports the enhancing constraint of trough, then having degrees of freedom because forming spacing with crest.
Sheath outside metal bellows 1 comprises and is wrapped in ribbon spiral the inner sheath 7 that strengthens outside ring 2 and is wrapped in the oversheath 8 outside inner sheath 7 with contrary rotation direction, and inner sheath 7 and oversheath 8 have the spiral spacer being less than strip width respectively.This spiral spacer is less than the ring distance strengthening ring 3.The two ends of oversheath 8 are welded with the two ends of inner sheath 7 respectively, then weld with the enhancing ring 4 at two ends and be connected.Enhancing ring 4 outer end at two ends is planar end surface, and the planar end surface of two outer ends to weld with the interior edge face of corresponding ring flat-plate 6 respectively by baffle rings 5 and is connected, and the endoporus of ring flat-plate 6 welds with adapter 2 and is connected.
Test proves, the constraint that the column instability distortion of metal corrugated pipe expansion joint under interior pressure effect of the present embodiment is subject to inner sheath 7 and oversheath 8 by enhancing ring 3 suppresses, and may be limited to permission range completely, has therefore stopped the Pole-shape unstability of bellows 1.And due to sheath 7,8 spring-like structure, be provided with screw thread interval, therefore can with bellows 1 deform in same pace, compensate the various displacements (axially, radial, angle and compound displacement) of outside (pipeline or equipment).
In addition to the implementation, the present invention can also have other mode of executions, and such as metal corrugated pipe expansion joint can arrange pull bar, hinge, forms compound pull bar expansion joint, angular expansion section etc.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (5)
1. an anti-unstability metal corrugated pipe expansion joint, comprises the metal bellows that two ends connect circular adapter respectively, outside described metal bellows, sheath is housed; It is characterized in that: between the adjacent corrugations outside described metal bellows, be lined with enhancing ring, the cross section of described enhancing ring is by extending the T-shaped inserting muscle in the middle part of straight outer shroud inwardly, described straight bore diameter of outer ring is greater than the external diameter of described metal bellows, and between the straight outer shroud of adjacent enhancing ring, there is ring distance, the inner shape of described insertion muscle and described metal bellows trough matching form, and be gradually-reducing shape by the inner towards straight outer shroud; Described sheath comprises the inner sheath that is spirally wound on and strengthens outside ring and is wrapped in the oversheath outside inner sheath with contrary rotation direction, and described inner sheath and oversheath have spiral spacer respectively; The two ends of described oversheath are connected respectively by the enhancing ring at inner sheath and two ends, and the enhancing ring at described two ends is connected with corresponding ring flat-plate interior edge face respectively, and endoporus and the adapter of described ring flat-plate are connected.
2. anti-unstability metal corrugated pipe expansion joint according to claim 1, is characterized in that: the enhancing ring outer end at two ends is planar end surface.
3. anti-unstability metal corrugated pipe expansion joint according to claim 2, is characterized in that: described planar end surface to be welded with the interior edge face of corresponding ring flat-plate by baffle rings and is connected.
4. anti-unstability metal corrugated pipe expansion joint according to claim 3, is characterized in that: described inner sheath and oversheath adopt band to be wound around respectively, and described spiral spacer is less than strip width.
5. anti-unstability metal corrugated pipe expansion joint according to claim 4, is characterized in that: described spiral spacer is less than the ring distance strengthening ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410495317.7A CN104266028A (en) | 2014-09-24 | 2014-09-24 | Instability preventing type expansion joint of metal corrugated pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410495317.7A CN104266028A (en) | 2014-09-24 | 2014-09-24 | Instability preventing type expansion joint of metal corrugated pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104266028A true CN104266028A (en) | 2015-01-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410495317.7A Pending CN104266028A (en) | 2014-09-24 | 2014-09-24 | Instability preventing type expansion joint of metal corrugated pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104266028A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805777A (en) * | 2019-11-06 | 2020-02-18 | 北京韩建河山管业股份有限公司湖北分公司 | Double-seal expansion joint capable of being maintained on line |
| CN111054995A (en) * | 2019-12-02 | 2020-04-24 | 秦皇岛市泰德管业科技有限公司 | Novel light armor ring structure of bellows |
| CN111795249A (en) * | 2020-07-24 | 2020-10-20 | 济南隆凯新材料科技有限公司 | Compensator and application thereof |
| CN112325003A (en) * | 2020-11-16 | 2021-02-05 | 张家港市金达利模塑有限公司 | High-strength double-lining winding pipe |
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| CN2228600Y (en) * | 1995-08-03 | 1996-06-05 | 沈阳市广厦热力设备开发制造公司 | Armour cover type explosion-resistant corrugated expansion joint |
| JPH10220221A (en) * | 1997-01-31 | 1998-08-18 | Witzenmann Gmbh Metallschlauchfab Pforzheim | Flexible pipe line element |
| JPH11344168A (en) * | 1998-05-14 | 1999-12-14 | Witzenmann Gmbh Metallschlauchfab Pforzheim | Hose having interlock profile |
| CN2605455Y (en) * | 2003-01-22 | 2004-03-03 | 南京晨光航天应用技术股份有限公司 | High-pressure hose for filling thick oil in steam pipeline |
| CN201382232Y (en) * | 2009-04-03 | 2010-01-13 | 北京兴达波纹管有限公司 | Tension bar dual-layer corrugated compensator with detection connectors |
| CN201723914U (en) * | 2010-07-22 | 2011-01-26 | 南通曙光波纹管制造有限公司 | Wear-resistant metal hose |
| CN201723900U (en) * | 2010-07-01 | 2011-01-26 | 江苏巨光机械有限公司 | Large compensation bellows expansion joint |
| CN202733294U (en) * | 2012-06-07 | 2013-02-13 | 南通曙光波纹管制造有限公司 | Double-deck pressure-balanced type expansion joint with monitoring device of ethylene unit |
| CN203115332U (en) * | 2012-12-08 | 2013-08-07 | 中国航天科技集团公司第六研究院第十一研究所 | Reinforced multi-layer S-shaped metal corrugated tube |
| CN204164575U (en) * | 2014-09-24 | 2015-02-18 | 南京晨光汉森柔性管有限公司 | A kind of anti-unstability metal corrugated pipe expansion joint |
-
2014
- 2014-09-24 CN CN201410495317.7A patent/CN104266028A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2228600Y (en) * | 1995-08-03 | 1996-06-05 | 沈阳市广厦热力设备开发制造公司 | Armour cover type explosion-resistant corrugated expansion joint |
| JPH10220221A (en) * | 1997-01-31 | 1998-08-18 | Witzenmann Gmbh Metallschlauchfab Pforzheim | Flexible pipe line element |
| JPH11344168A (en) * | 1998-05-14 | 1999-12-14 | Witzenmann Gmbh Metallschlauchfab Pforzheim | Hose having interlock profile |
| CN2605455Y (en) * | 2003-01-22 | 2004-03-03 | 南京晨光航天应用技术股份有限公司 | High-pressure hose for filling thick oil in steam pipeline |
| CN201382232Y (en) * | 2009-04-03 | 2010-01-13 | 北京兴达波纹管有限公司 | Tension bar dual-layer corrugated compensator with detection connectors |
| CN201723900U (en) * | 2010-07-01 | 2011-01-26 | 江苏巨光机械有限公司 | Large compensation bellows expansion joint |
| CN201723914U (en) * | 2010-07-22 | 2011-01-26 | 南通曙光波纹管制造有限公司 | Wear-resistant metal hose |
| CN202733294U (en) * | 2012-06-07 | 2013-02-13 | 南通曙光波纹管制造有限公司 | Double-deck pressure-balanced type expansion joint with monitoring device of ethylene unit |
| CN203115332U (en) * | 2012-12-08 | 2013-08-07 | 中国航天科技集团公司第六研究院第十一研究所 | Reinforced multi-layer S-shaped metal corrugated tube |
| CN204164575U (en) * | 2014-09-24 | 2015-02-18 | 南京晨光汉森柔性管有限公司 | A kind of anti-unstability metal corrugated pipe expansion joint |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805777A (en) * | 2019-11-06 | 2020-02-18 | 北京韩建河山管业股份有限公司湖北分公司 | Double-seal expansion joint capable of being maintained on line |
| CN111054995A (en) * | 2019-12-02 | 2020-04-24 | 秦皇岛市泰德管业科技有限公司 | Novel light armor ring structure of bellows |
| CN111795249A (en) * | 2020-07-24 | 2020-10-20 | 济南隆凯新材料科技有限公司 | Compensator and application thereof |
| CN111795249B (en) * | 2020-07-24 | 2021-11-19 | 济南新材料产业技术研究院 | Compensator and application thereof |
| CN112325003A (en) * | 2020-11-16 | 2021-02-05 | 张家港市金达利模塑有限公司 | High-strength double-lining winding pipe |
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| 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 |
Application publication date: 20150107 |