CN1488884A - Balanced stretcher - Google Patents
Balanced stretcher Download PDFInfo
- Publication number
- CN1488884A CN1488884A CNA031356605A CN03135660A CN1488884A CN 1488884 A CN1488884 A CN 1488884A CN A031356605 A CNA031356605 A CN A031356605A CN 03135660 A CN03135660 A CN 03135660A CN 1488884 A CN1488884 A CN 1488884A
- Authority
- CN
- China
- Prior art keywords
- dome
- outer tube
- pipe
- chamber
- interior pipe
- 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.)
- Pending
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Abstract
The present invention relates to a balanced expansion device. It comprises an external pipe and an internal pipe which is positioned in the external pipe and seal-connected with said external pipe, said two pipes are movable fit, the internal pipe has a free stroke in the external pipe, on the internal pipe a circular projection is set, and on the circular projection a sealing ring is set, and in the circular projection of internal wall of end portion of the external pipe or sealing cap the sealing ring is set, between two sealing rings a sealed gap chamber is formed, and said gap chamber is communicated with internal cavity of the internal pipe by means of at least one through hole by circular projection.
Description
Technical field:
The present invention is relevant with the flexible connection set of pipeline balanced type.
Background technique:
The existing pipeline balanced type slip joint that is used for, as described in Chinese patent notification number CN2380779Y, it comprises a joint outer tube, on an end mouth of pipe of this outer tube, be provided with a pipe joint, on the other end mouth of pipe of this outer tube, be provided with a sealed cap, in this outer tube, be with a joint telescopic in pipe, an end mouth of pipe of this interior pipe is positioned at described outer tube, this mouth of pipe is the built-in mouth of pipe, all can be provided with seal ring on the inwall at the two ends of outer tube or in sealed cap; On the outer rim of the described built-in mouth of pipe, be provided with a dome, on this dome, also be provided with seal ring, thereby make between described inside and outside two pipes and form chamber, an airtight gap, be arranged on the pipe in described that described dome is other to be provided with one at least and to link up with chamber, described airtight gap only and can make the liquid of pipeline or gas flow into the indoor through hole in this airtight gap, perhaps pipe is provided with a pressure-bearing damping spring in this, it is indoor to flow into the gap by the fluid in the pipeline, form a reaction force that is used for tackling from pressure in the pipeline, it is flexible that pipe vertically is not intended to power in stoping, and the pressure-bearing damping spring of interior pipe also has above-mentioned effect.But interior pipe or outer tube can not balances at the hydrodynamic pressure lower stress, and the sealing of inner and outer pipes is also unreliable.
The content of invention:
The purpose of this invention is to provide a kind of simple in structure, installation, dismounting and easy to maintenance, sealing is reliable, under any hydrodynamic pressure, the stress balance of outer tube and interior pipe, the power that can vertically not be not intended to stretches, but the balanced type expansion bend that can freely extend and shorten with expanding with heat and contract with cold of the pipeline that is connected.
The present invention is achieved in that
Balanced type expansion bend of the present invention, comprise outer tube (1) and be positioned at the pipe (2) that outer tube (1) is tightly connected with it, inner and outer pipes movingly, interior pipe has a free travel at outer tube bore, one dome (3) is arranged on the interior pipe, dome (3) is provided with seal ring (4), be provided with seal ring (4) in the dome of tube end inwall or the sealed cap (5) outside, form seal clearance chamber (6) between two seal rings, dome (3) next door has at least a through hole (7) that chamber, gap (6) are communicated with interior tube cavity, outer tube passage area of contour (S
1) equal the annular vertical area (S of dome (3) in chamber, gap (6)
2), also equal vertically area (S of the inner annular chamber, gap (6) in of the end inwall dome of outer tube or sealed cap (5)
3).
Annular shoulder (8) in the outer tube (1) has at least a through hole (10) to lead to atmosphere with the chamber, gap (9) that dome (3) constitutes.
The other end of outer tube (1) has flange (11) to be connected with other pipeline with Sealing (13) by link (12).
In pipe (2) dome (3) to one section of the inner of interior pipe with the reduced diameter section of outer tube movingly, seal ring (4) is arranged between the two, the enlarged diameter section of dome (3) and outer tube movingly, the outer end of interior pipe is by even screw thread or flange are connected with other pipeline.
One end of outer tube is threaded with sealed cap (5), and sealed cap (5) and outer wall of inner tube have seal ring (4) therebetween movingly, and the inner of sealed cap (5) and dome (3) form seal clearance chamber (6).
The present invention makes outer tube passage area of contour S by designing and calculating
1Equal annular cross-sectional area S
2, pipe hydraulic coupling situation lower stress balance in any in the expansion bend then; Make outer tube passage area of contour S
1Equal annular cross-sectional area S
3, expansion bend outer tube hydraulic coupling situation lower stress balance in any then.Expansion bend can freely extend along with expanding with heat and contract with cold of pipeline and shorten like this.
Expansion bend adopts substance or dual O shape Mi Quan (4) slipper seal to increase sealing reliability, and the special Placement that a head flange one head thread connects is convenient to install on the spot, dismantles and is overhauled.
Description of drawings:
Fig. 1 is a structural drawing of the present invention.
Embodiment:
The outer end of interior pipe 2 has screw thread to be connected with other pipeline.The other end of outer tube 1 has flange 11 to dock with the flange of connecting tube, between sealing gasket 13 is arranged, both flanges have the screw-internal thread fit of outside thread and link 12.
Outer tube passage area of contour S
1Equal dome 3 in the gap the vertical area S of indoor annular
2, also equal the vertical area S of the annular of sealed cap 5 the inners in chamber, gap 6
3
Claims (5)
1, balanced type expansion bend, comprise outer tube (1) and be positioned at the pipe (2) that outer tube (1) is tightly connected with it, inner and outer pipes movingly, interior pipe has a free travel at outer tube bore, one dome (3) is arranged on the interior pipe, dome (3) is provided with seal ring (4), be provided with seal ring (4) in the dome of tube end inwall or the sealed cap (5) outside, form seal clearance chamber (6) between two seal rings, dome (3) next door has at least a through hole (7) that chamber, gap (6) are communicated with interior tube cavity, it is characterized in that outer tube passage area of contour (S
1) equal the annular vertical area (S of dome (3) in chamber, gap (6)
2), also equal vertically area (S of the inner annular chamber, gap (6) in of the end inwall dome of outer tube or sealed cap (5)
3).
2, balanced type expansion bend according to claim 1 is characterized in that the annular shoulder (8) in the outer tube (1) has at least a through hole (10) to lead to atmosphere with the chamber, gap (9) that dome (3) constitutes.
3, balanced type expansion bend according to claim 1 is characterized in that the other end of outer tube (1) has flange (11) to be connected with other pipeline with Sealing (13) by link (12).
4, balanced type expansion bend according to claim 1, the dome (3) that it is characterized in that interior pipe (2) to one section of the inner of interior pipe with the reduced diameter section of outer tube movingly, seal ring (4) is arranged between the two, the enlarged diameter section of dome (3) and interior pipe movingly, the outer end of interior pipe is connected with other pipeline by link.
5, balanced type expansion bend according to claim 1, an end that it is characterized in that outer tube is threaded with sealed cap (5), sealed cap (5) and outer wall of inner tube have seal ring (4) therebetween movingly, and the inner of sealed cap (5) and dome (3) form seal clearance chamber (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031356605A CN1488884A (en) | 2003-08-25 | 2003-08-25 | Balanced stretcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031356605A CN1488884A (en) | 2003-08-25 | 2003-08-25 | Balanced stretcher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1488884A true CN1488884A (en) | 2004-04-14 |
Family
ID=34154736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031356605A Pending CN1488884A (en) | 2003-08-25 | 2003-08-25 | Balanced stretcher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1488884A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643854A (en) * | 2016-12-27 | 2017-05-10 | 新乡航空工业(集团)有限公司 | Instrument clamping table |
| CN109723389A (en) * | 2017-10-30 | 2019-05-07 | 中国石油化工股份有限公司 | A kind of length compensation device |
-
2003
- 2003-08-25 CN CNA031356605A patent/CN1488884A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643854A (en) * | 2016-12-27 | 2017-05-10 | 新乡航空工业(集团)有限公司 | Instrument clamping table |
| CN109723389A (en) * | 2017-10-30 | 2019-05-07 | 中国石油化工股份有限公司 | A kind of length compensation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |