CN102384329A - Dedicated expansion joint for plastic pipeline system - Google Patents
Dedicated expansion joint for plastic pipeline system Download PDFInfo
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- CN102384329A CN102384329A CN2011103732690A CN201110373269A CN102384329A CN 102384329 A CN102384329 A CN 102384329A CN 2011103732690 A CN2011103732690 A CN 2011103732690A CN 201110373269 A CN201110373269 A CN 201110373269A CN 102384329 A CN102384329 A CN 102384329A
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- sleeve
- flange
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- plastic pipe
- plastic pipeline
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Abstract
The invention discloses a dedicated expansion joint for a plastic pipeline system. One end of each plastic pipeline is used as a fixed end, and the other end of each plastic pipeline is used as an expansion end. The dedicated expansion joint is characterized by comprising a sleeve, wherein two ends of the sleeve are respectively and fixedly connected with a front flange and a rear flange, the fixed end of one plastic pipeline is connected with the front flange of the sleeve through a matching flange, the expansion end of the other plastic pipeline is inserted into the sleeve from the rear flange end, and the plastic pipeline at the expansion end and the sleeve are axially in plug-in connection with each other in a freely sliding manner and are axially sealed with end face seal. The sufficient expansion space is reserved at the connecting part of the pipeline, so as to ensure sufficient allowance compensation when the pipeline retracts or expands, the plastic pipeline system is ensured not to be damaged, and the leakage is prevented by adopting axial sealing and end face sealing at the connecting part. The dedicated expansion joint has a scientific design and a simple structure and well solves the problem of damages to the plastic pipeline system caused by tensile deformation or expansion and contraction.
Description
Technical field
The present invention relates to laying and being connected of pipe-line system, particularly a kind ofly be used for the special-purpose expansion bend that plastic duct system connects.
Background technique
Plastic pipe is widely used in the branch road of water supply and sewerage pipeline system; Be connected through reducing socket with main pipe, because plastic pipe self thermal expansion coefficient is bigger, pipeline junction is fixed hard connection; Causing plastic pipe to expand during heat expansion decreases; The pipeline retraction causes the socket joint connection to come off during shrinkage, causes the pipe network heavy damage, influences water supply security; Pipeline for using non-excavation to lay is particularly outstanding; Because non-excavation lays and need draw plastic pipe, make plastic pipe tensile buckling, lay completion after; Plastic pipe has a process that bounces back naturally; Under the retraction or the effect of shrinkage naturally, when retracting force and retraction displacement reach a certain amount of, will cause socket joint to connect and come off.
In order to prevent plastic pipe tensile buckling or to expand with heat and contract with cold pipeline is damaged, in the laid processes of plastic duct system, adopting snake laying usually or adding a shape compensation increases distortion allowance, and the joint is fixed hard connection.Snake laying can solve the short distance plastic pipe and lay the little problem of extending amount variation; But lay for long distance; Its shortcoming is mainly: snakelike compensation is owing to limited by raceway groove and caliber, and its compensation rate is less, is not enough to compensate the contour projector of pipeline; Bigger pulling force is caused in the fixed connection place, can cause the excessive generation plastic deformation of stress finally to form the joint in the fixed connection place later for a long time and break.Door shape compensation is except that receiving the restriction of raceway groove and caliber, and its Economy is also restricting and can not in actual large diameter pipeline system, use.
Summary of the invention
The object of the present invention is to provide a kind of special-purpose expansion bend of plastic duct system that satisfies the plastic pipe flexible compensation, can fundamentally thoroughly solve because of tensile buckling or the problem of expanding with heat and contract with cold and causing plastic duct system to wreck.
The objective of the invention is to be achieved through following technological scheme, the special-purpose expansion bend of plastic duct system, an end of said plastic pipe is as fixed end; The other end is as flexible end; It is characterized in that comprise a sleeve, an end of said sleeve is connected with the fixed end of plastic pipe; The flexible end of another root plastic pipe inserts the other end of said sleeve, axially grafting of free skating dynamic formula and axial seal between the plastic pipe of flexible end and the sleeve.
Further technological scheme of the present invention is; The two ends of said sleeve are fixedly connected a preposition flange and a rearmounted flange respectively; The fixed end of said plastic pipe cooperates flange to be connected with the preposition flange of sleeve through one; The flexible end of said another root plastic pipe inserts in the sleeve from rearmounted flange end, the axially grafting of free skating dynamic formula and axial seal and end face seal between the plastic pipe of said flexible end and the sleeve.
The present invention's technological scheme further is; The sleeve lining of nearly rearmounted flange end is circumferentially with annular retaining ring; The plastic pipe of flexible end passes this annular retaining ring, and the said annular retaining ring outside is provided with Sealing, and the outside of said Sealing is provided with and compresses end cap; The said end cap that compresses is connected with rearmounted secure, and the plastic pipe that forms flexible end is free to slide in sleeve and axial seal and end face seal.
Said flexible end plastic pipe inserts 1/3～2/3 place in the sleeve.
Described preposition flange with cooperate between the flange, rearmounted flange with compress that the employing bolton is connected between the end cap.
Said sleeve is a metal sleeve, and weld with preposition flange, rearmounted flange respectively at the two ends of sleeve.
The present invention reserves enough extendable rooms through the pipeline connection part; When the pipeline contraction or expansion, having the compensation of enough surplus to guarantee in the plastic duct system that socket joint connects can not come off and plastic pipe itself can not be destroyed yet; The joint adopts axial seal and end face seal not to leak with assurance; Design science of the present invention, simple in structure has solved because of tensile buckling or the problem of expanding with heat and contract with cold and causing plastic duct system to wreck well.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is used for the assembling schematic representation of plastic duct system for the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further explain.
In conjunction with Fig. 1, shown in Figure 2; The present invention includes a metal sleeve 1, the two ends of metal sleeve 1 are welded a preposition flange 2 and a rearmounted flange 3 respectively, and the fixed end of plastic pipe 8 cooperates flange 7 to be connected with preposition flange 2 through one; The flexible end of another root plastic pipe 9 inserts in the metal sleeve 1 from rearmounted flange 3 ends; Insert in the metal sleeve 1 flexible end plastic pipe and account for 1/3～2/3 of length sleeve and be advisable, be circumferentially with annular retaining ring 4 near metal sleeve 1 inwall of rearmounted flange 3 ends, the plastic pipe of flexible end passes annular retaining ring 4; The outside of annular retaining ring 4 is provided with Sealing 5; The outside of Sealing 5 is provided with and compresses end cap 6, compresses end cap 6 and is fastenedly connected with rearmounted flange 3, Sealing 5 and the sealing that compresses end cap 6 assurance plastic pipes; The plastic pipe that forms flexible end both can be free to slide in metal sleeve 1, had realized that again axial seal and end face seal can not leak.Preposition flange 2 with cooperate between the flange 7, rearmounted flange 3 with compress that the employing bolton is connected between the end cap 6.
Installation method: earlier with preposition flange 2 ends of metal sleeve 1 being connected through a fixed end that cooperates flange 7 and a plastic pipe; The flexible end cover of another root plastic pipe is inserted through the back-up ring of metal sleeve 1 inwall by rearmounted flange 3 ends of metal sleeve 1; The plastic pipe of flexible end can be free to slide in metal sleeve 1 vertically, Sealing 5 be compressed with being fastenedly connected of rearmounted flange 3 through compressing end cap 6 then, form axial seal and end face seal acting in conjunction; Guarantee that the press water in the pipeline does not leak; The completion expansion bend is connected with pipe-line system, and compact structure of the present invention is easy for installation; There are enough surpluses to guarantee that pipe-line system is not destroyed during the pipeline contraction or expansion, solved because of tensile buckling well or the problem of expanding with heat and contract with cold and causing plastic duct system to wreck.
The foregoing description is only as a preferred embodiments of the present invention; To specify technical conceive of the present invention and essential implementation; Be not that protection scope of the present invention is limited; All any simple modification that spirit is done according to the present invention and equivalent structure transformation or modification all should be encompassed within protection scope of the present invention.
Claims (6)
1. the special-purpose expansion bend of plastic duct system; One end of said plastic pipe is as fixed end; The other end is as flexible end, and it is characterized in that: comprise a sleeve, an end of said sleeve is connected with the fixed end of plastic pipe; The flexible end of another root plastic pipe inserts the other end of said sleeve, the axially grafting of free skating dynamic formula and axial seal and end face seal between the plastic pipe of flexible end and the sleeve.
2. the special-purpose expansion bend of plastic duct system according to claim 1; It is characterized in that: the two ends of said sleeve are fixedly connected a preposition flange and a rearmounted flange respectively; The fixed end of said plastic pipe cooperates flange to be connected with the preposition flange of sleeve through one; The flexible end of said another root plastic pipe inserts in the sleeve from rearmounted flange end, the axially grafting of free skating dynamic formula and axial seal and end face seal between the plastic pipe of said flexible end and the sleeve.
3. the special-purpose expansion bend of plastic duct system according to claim 2; It is characterized in that: the sleeve lining of nearly rearmounted flange end is circumferentially with annular retaining ring; The plastic pipe of flexible end passes this annular retaining ring, and the said annular retaining ring outside is provided with Sealing, and the outside of said Sealing is provided with and compresses end cap; The said end cap that compresses is connected with rearmounted secure, and the plastic pipe that forms flexible end is free to slide in sleeve and axial seal and end face seal.
4. according to claim 1, the special-purpose expansion bend of 2 or 3 described plastic duct systems, it is characterized in that: said flexible end plastic pipe inserts 1/3～2/3 place in the sleeve.
5. the special-purpose expansion bend of plastic duct system according to claim 3 is characterized in that: preposition flange with cooperate between the flange, rearmounted flange with compress that the employing bolton is connected between the end cap.
6. the special-purpose expansion bend of plastic duct system according to claim 3, it is characterized in that: said sleeve is a metal sleeve, weld with preposition flange, rearmounted flange respectively at the two ends of sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103732690A CN102384329A (en) | 2011-11-22 | 2011-11-22 | Dedicated expansion joint for plastic pipeline system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103732690A CN102384329A (en) | 2011-11-22 | 2011-11-22 | Dedicated expansion joint for plastic pipeline system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102384329A true CN102384329A (en) | 2012-03-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103732690A Pending CN102384329A (en) | 2011-11-22 | 2011-11-22 | Dedicated expansion joint for plastic pipeline system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102384329A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486390A (en) * | 2013-09-05 | 2014-01-01 | 大连卓远重工有限公司 | Ripple compensator of hydroelectric generating set |
| CN104514937A (en) * | 2013-09-30 | 2015-04-15 | 武汉市无穷大能源科技有限公司 | Expansion joint of multi-way pipeline |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1297288A (en) * | 1969-12-22 | 1972-11-22 | ||
| EP0046527B1 (en) * | 1980-08-19 | 1984-06-13 | Kempchen & Co. GmbH | Pipe joint for steel pipes large in diameter, especially for gas pipe lines |
| CN2143710Y (en) * | 1992-09-19 | 1993-10-13 | 郑州市金水补偿器厂 | Two-way seal sleeve type pipe compensator |
| CN2589789Y (en) * | 2002-12-07 | 2003-12-03 | 宋章根 | Improved rotary type compensation apparatus |
| CN1975226A (en) * | 2006-08-11 | 2007-06-06 | 宋章根 | Underground pipeline non-support long-distance compensating method and system thereof |
| CN200940752Y (en) * | 2006-08-11 | 2007-08-29 | 宋章根 | High pressure resistance rotary compensator for pipeline |
| CN101846222A (en) * | 2009-03-26 | 2010-09-29 | 南通市志华管道配件有限责任公司 | General purpose steel-plastic flange expansion joint |
| CN202327490U (en) * | 2011-11-22 | 2012-07-11 | 黄有勇 | Special expansion piece for plastic pipe system |
-
2011
- 2011-11-22 CN CN2011103732690A patent/CN102384329A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1297288A (en) * | 1969-12-22 | 1972-11-22 | ||
| EP0046527B1 (en) * | 1980-08-19 | 1984-06-13 | Kempchen & Co. GmbH | Pipe joint for steel pipes large in diameter, especially for gas pipe lines |
| CN2143710Y (en) * | 1992-09-19 | 1993-10-13 | 郑州市金水补偿器厂 | Two-way seal sleeve type pipe compensator |
| CN2589789Y (en) * | 2002-12-07 | 2003-12-03 | 宋章根 | Improved rotary type compensation apparatus |
| CN1975226A (en) * | 2006-08-11 | 2007-06-06 | 宋章根 | Underground pipeline non-support long-distance compensating method and system thereof |
| CN200940752Y (en) * | 2006-08-11 | 2007-08-29 | 宋章根 | High pressure resistance rotary compensator for pipeline |
| CN101846222A (en) * | 2009-03-26 | 2010-09-29 | 南通市志华管道配件有限责任公司 | General purpose steel-plastic flange expansion joint |
| CN202327490U (en) * | 2011-11-22 | 2012-07-11 | 黄有勇 | Special expansion piece for plastic pipe system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486390A (en) * | 2013-09-05 | 2014-01-01 | 大连卓远重工有限公司 | Ripple compensator of hydroelectric generating set |
| CN104514937A (en) * | 2013-09-30 | 2015-04-15 | 武汉市无穷大能源科技有限公司 | Expansion joint of multi-way pipeline |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120321 |