CN2180864Y - Directly-buried disposable bellows expand joint - Google Patents
Directly-buried disposable bellows expand joint Download PDFInfo
- Publication number
- CN2180864Y CN2180864Y CN 93246641 CN93246641U CN2180864Y CN 2180864 Y CN2180864 Y CN 2180864Y CN 93246641 CN93246641 CN 93246641 CN 93246641 U CN93246641 U CN 93246641U CN 2180864 Y CN2180864 Y CN 2180864Y
- Authority
- CN
- China
- Prior art keywords
- expansion joint
- bellows
- outer sleeve
- buried type
- disposable
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Joints Allowing Movement (AREA)
Abstract
The utility model relates to a directly-buried disposable corrugated expansion joint, which belongs to the compensation for a directly-buried pipeline. The expansion joint adopts a reinforcing rib plate, a reinforcing ring, etc., and the corrugated pipe is completely contained in an outer sleeve pipe. When the corrugated pipe is mode of stainless steel material, a pressure test assembly can be cancelled. Because the structure of the utility model is reasonable, the weld seam strength of the expansion joint can be conspicuously enhanced, and the weld seam and the corrugated pipe can not be easily broken. In the construction process of the utility model, the installation is convenient, and the construction cost is decreased. The pipeline is safe and reliable when the pipline is used for a long time.
Description
The disposable corrugated expansion joint of a kind of directly buried type, it belongs to the directly buried pipeline compensation.
Along with the continuous development of pipe technology, the expansion joint of the existing multiple structural type of compensation of expanding with heat and contract with cold of pipeline is used in engineering reality.Facts have proved, the structure of most expansion joints is rational, yet also some expansion joint is unsatisfactory in practice, the disposable corrugated expansion joint that particularly in the past was used for direct buried pipeline is because its unreasonable structure, so that most carbon steel weld strengths of expansion joint self are not enough, can not bear the temperature difference stress that pipeline produces under action of thermal difference.Simultaneously, because of compensating element---bellows can not get due reinforcement with the end pipe weld seam that is connected, therefore must the strict weldquality that detects the expansion joint exposed parts in installation process, promptly check its seal, and make inconvenience be installed that operating expenses increases.
The purpose of this utility model is to be a kind of disposable corrugated expansion joint of direct buried piping design.This expansion joint can overcome the shortcoming of disposable expansion joint in the past, and safe and reliable in application in practice, engineering cost is cheap.
The technical solution of the utility model is: the disposable corrugated expansion joint of a kind of directly buried type, it mainly comprises end pipe, bellows, outer sleeve, and characteristics of the present utility model are that it also comprises the some reinforcement gussets that are distributed in four positions, two stiffening rings, bellows all is included among the outer sleeve.End pipe exposed parts length is greater than the twice of the heat affected zone length of this tube material electric arc welding.
The some reinforcement gussets that are distributed in four positions, be evenly distributed on the circumference of expansion joint, the shape of strengthening gusset can be that to go up the bottom be the trapezoidal of straight line or certain curve, or the bottom is the triangle of straight line or curve, strengthens the quantity of gusset and is determined by its intensity.
Two stiffening rings are welded on the bellows straight section, and stiffening ring can be manufactured with stainless steel or carbon steel, and the section configuration of stiffening ring can be rectangle, circle, square or trapezoidal.
Bellows all is included among little outer sleeve or the big outer sleeve, when bellows is stainless steel, can cancel its pressure testing assembly.
The guiding theory of aforementioned techniques scheme is: the disposable corrugated expansion joint of this directly buried type has installed the reinforcement gusset additional at four positions, the temperature difference stress that makes the weld seam of expansion joint be subjected in the pipe temperature change procedure is lower than its allowable stress, guarantee that expansion joint is safe and reliable in pipeline operation (comprising Installation and Debugging) process, its weld seam avoids destroyed.The straight section of bellows has installed stiffening ring additional, when bellows is stainless steel, can cancel the pressure testing assembly, needn't carry out the seal test by butt welded seam.But can not therefore reduce weld seam technological operation requirement.
Bellows is included in purpose in big outer sleeve or the little outer sleeve fully to be to change because of out-of-shape takes place the preheating pressure medium when the bellows preheating, shape after the variation will be subjected to the constraint of big outer sleeve and little outer sleeve, and be unlikely cooperation slip place that the external frame that changes the rear section drops on big outer sleeve and little outer sleeve, scratch the destruction bellows when preventing that big outer sleeve and little outer sleeve from sliding.
End pipe exposed parts length is greater than the twice of the heat affected zone length of this material when the electric arc welding, so that guarantee end pipe intensity effectively, the heat affected zone of the weld seam that has formed when having avoided the weld seam of expansion joint and two free ends to install and use overlaps, this is exactly in fact to be avoided holding pipe to reduce in the intensity of heat affected zone, guarantees the safety of pipeline in the spreadable life.
Effect of the present utility model is: the disposable corrugated expansion joint of this directly buried type, owing to adopted the reinforcement gusset, stiffening ring, and bellows all is included among the outer sleeve, and end pipe exposed parts length is greater than the twice of the heat affected zone length of this tube material electric arc welding, make that its structure is more reasonable, expansion joint weld seam in the pipeline running is difficult for destroyed, guarantees that the intensity of end pipe in the heat affected zone does not reduce.The reliable performance of expansion joint, the pipeline safety in the spreadable life is guaranteed.When bellows is stainless steel, can cancel the pressure testing assembly, and needn't carry out the seal test exposing weld seam, simplified work progress, reduced engineering cost.
Description of drawings: accompanying drawing 1 is the structural drawing of the disposable corrugated expansion joint of the utility model directly buried type.
Be an embodiment of the present utility model below, provide details of the present utility model by description and accompanying drawing to this embodiment.
Claims (5)
1, the disposable corrugated expansion joint of a kind of directly buried type, mainly comprise end pipe, bellows and outer sleeve, feature of the present utility model is that it also comprises some reinforcement gusset [2], [3], [7], [9] that are distributed in four positions, two stiffening rings [17], bellows all is included among outer sleeve [5], [6], and end pipe exposed parts [1], [10] length are greater than the twice of the heat affected zone length of this tube material electric arc welding.
2, the disposable corrugated expansion joint of directly buried type according to claim 1, the reinforcement gusset (2), (3), (7), (9) that it is characterized in that some four positions are evenly distributed on the circumference of expansion joint, the shape of strengthening gusset can be that upward the bottom is the trapezoidal of straight line or certain curve, or the bottom is the triangle of straight line or curve, strengthens the quantity of gusset and determined by intensity.
3, the disposable corrugated expansion joint of directly buried type according to claim 2, it is characterized in that two stiffening rings (17) are welded on the bellows straight section, available stainless steel of stiffening ring (17) or carbon steel are manufactured, and its section configuration can be rectangle, circle, square or trapezoidal.
4, the disposable corrugated expansion joint of directly buried type according to claim 3 is characterized in that bellows (14) all is included among little outer sleeve (5) or the big outer sleeve (6).
5, the disposable corrugated expansion joint of directly buried type according to claim 4 is characterized in that can cancelling its pressure testing assembly (16) when bellows (14) is stainless steel.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 93246641 CN2180864Y (en) | 1993-12-30 | 1993-12-30 | Directly-buried disposable bellows expand joint |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 93246641 CN2180864Y (en) | 1993-12-30 | 1993-12-30 | Directly-buried disposable bellows expand joint |
Publications (1)
Publication Number | Publication Date |
---|---|
CN2180864Y true CN2180864Y (en) | 1994-10-26 |
Family
ID=33819286
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 93246641 Expired - Fee Related CN2180864Y (en) | 1993-12-30 | 1993-12-30 | Directly-buried disposable bellows expand joint |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN2180864Y (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101251217B (en) * | 2007-12-18 | 2010-06-02 | 北京航天凯撒国际投资管理有限公司 | Hot melt spigot-and-socket special pipe fittings for metallic plastic-lining pipe |
CN103470900A (en) * | 2013-08-30 | 2013-12-25 | 江苏新方圆电气设备制造有限公司 | Rectangular expansion joint |
CN113389942A (en) * | 2021-06-28 | 2021-09-14 | 武汉大学 | Underground buried pressure steel pipe fracture-resistant structure of over-active fault |
-
1993
- 1993-12-30 CN CN 93246641 patent/CN2180864Y/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101251217B (en) * | 2007-12-18 | 2010-06-02 | 北京航天凯撒国际投资管理有限公司 | Hot melt spigot-and-socket special pipe fittings for metallic plastic-lining pipe |
CN103470900A (en) * | 2013-08-30 | 2013-12-25 | 江苏新方圆电气设备制造有限公司 | Rectangular expansion joint |
CN103470900B (en) * | 2013-08-30 | 2016-03-02 | 江苏新方圆电气设备制造有限公司 | Rectangular expansion joint |
CN113389942A (en) * | 2021-06-28 | 2021-09-14 | 武汉大学 | Underground buried pressure steel pipe fracture-resistant structure of over-active fault |
CN113389942B (en) * | 2021-06-28 | 2022-07-19 | 武汉大学 | Underground buried pressure steel pipe fracture-resistant structure of over-active fault |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN108747077B (en) | Installation system and method for pressure steel pipe folding joint between adjacent filled piers | |
CN2180864Y (en) | Directly-buried disposable bellows expand joint | |
CN111335139A (en) | Temporary connection structure for steel pipe arch ring segments | |
CN205938242U (en) | Double -wall pipe inner tube is to removable outer tube of interface welding seam department | |
CN212690846U (en) | Full-sealing leakage-proof stop valve | |
CN212178250U (en) | Quick repairing device for annular welding seam of heat distribution pipeline | |
CN210510687U (en) | Pipeline elbow reinforcing device | |
CN208204004U (en) | A kind of novel framework rubber sheet gasket and its mounting structure | |
CN208871202U (en) | A kind of ready-package inner liner stainless steel composite pipe connector | |
CN212455896U (en) | High-temperature-resistant large-caliber steel lining tetrafluoro tee joint | |
CN201757223U (en) | Liner spigot-and-socket composite pipe | |
CN208474760U (en) | A kind of compound fit type damping corrugated expansion joint | |
CN207945364U (en) | A kind of double-wall hose | |
CN214948280U (en) | Leakage alarm protection device | |
CN208083659U (en) | A kind of Vacuum diffusion bonding furnace | |
CN215408632U (en) | Open-type TBM shield structure | |
CN206265654U (en) | Tank car detachable heat-insulation device | |
CN208442439U (en) | A kind of direct-burried one-off compensator | |
CN219809579U (en) | Industrial gas recycling and conveying pipeline | |
CN218972025U (en) | Steel pipe with anti-corrosion protective layer | |
CN218952693U (en) | Integral welding fume exhaust pipe | |
CN214889661U (en) | Three-dimensional corrugated compensator with guiding device | |
CN110145519A (en) | A kind of sealed flanged joint chimney of novel plugging | |
CN217900607U (en) | Heat exchanger structure with pipe pass without welding | |
CN213452237U (en) | Novel high-strength adapter flange |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C19 | Lapse of patent right due to non-payment of the annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |