CN1706716A - Inner expanding annular space stopper - Google Patents
Inner expanding annular space stopper Download PDFInfo
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- CN1706716A CN1706716A CN 200410045579 CN200410045579A CN1706716A CN 1706716 A CN1706716 A CN 1706716A CN 200410045579 CN200410045579 CN 200410045579 CN 200410045579 A CN200410045579 A CN 200410045579A CN 1706716 A CN1706716 A CN 1706716A
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- annular space
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- nut
- seal ring
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Abstract
The inner expanding annular space stopper is used in dry welding maintenance job in double-layer sea bed pipe to prevent gas in dry welding cabin from entering into the annular space of double-layer sea bed pipe. The stopper includes inner conic sleeve, outer conic sleeve, inner retaining ring, outer retaining ring, extrusion nut, outer rubber O-ring, inner O-ring, O-ring extruding ring and nut retaining ring. By means of the rotation of the extrusion nut and nut retaining ring to extrude the outer rubber O-ring and the inner O-ring, the present invention can prevent gas in dry welding cabin from entering the annular space, ensure the relative support of both inner and outer pipes and ensure the mechanical location of the annular space stopper inside the annular space. The present invention has simple structure, easy manufacture, reliable work performance, and convenient site construction.
Description
Technical field
The present invention relates to a kind of internal-expansion type annular space stopper device, it is mainly used in the seabed double-skin duct underwater dry-type welding maintenance activity, when gas enters annular space in preventing the dry type welding chamber, provides relative support for inner and outer pipes again.
Background technology
Be embedded in the long distance pipeline in seabed for a long time, owing to reasons such as burn into wearing and tearing, accidental damages, pipeline may leak.This just need keep in repair submerged pipeline.Known method for maintaining is maintenance waterborne and wet type maintenance under water.Maintenance waterborne need rise to damaged pipe on the maintenance ship waterborne to be carried out, and only is adapted to the maintenance of shallow sea area submerged pipeline.Wet type maintenance under water comprises that mainly steel maintenance cover repairing method, mechanical connector repairing method are connected repairing method etc. with flange, they all belong to the mode of mechanical connection basically, the reliability and the requirement in life-span to mechanical device are very high, construction and equipment cost are higher, technology is comparatively complicated, and duty cycle is long.
For this reason, people have proposed a kind of underwater dry-type welding method and have been used to keep in repair submerged pipeline.In submerged pipeline underwater dry-type welding maintenance activity, need to cut off earlier to damage pipeline section, descend the dry type welding chamber again; Implement under the dry type environment in the dry type welding chamber newly to change pipeline section and originally do not damage being welded to connect between the pipeline section.
In the dry type welding chamber formation of dry type environment with keep, remove to get rid of the cabin maritime interior waters and realize by in the cabin, injecting high pressure gas.Because pipeline cuts off, for the formation that guarantees dry type environment in the dry type welding chamber with just keep and must carry out shutoff original pipeline that do not damage, prevent that the interior gas of dry type welding chamber from entering original pipeline that do not damage.
The seabed double-skin duct is made up of interior pipe, outer tube, the shutoff of tube space and the shutoff of annular space in pipe plugging comprises.Usually, the radial dimension of the annular space of double-skin duct is less.As outer external diameter of pipe 406.4mm, wall thickness 9.5mm, interior external diameter of pipe 323.9mm, its annular space radial dimension of the double-skin duct of wall thickness 10.3mm is 31.75mm only, in the annular space between inner and outer pipes heat-insulation layer is arranged, the shutoff difficulty.
Gas does not enter annular space in the dry type welding chamber in order to make, make, the many years of experience of research and development by this area with being engaged in for the inventor, finally well-designedly after exploitation improvement repeatedly go out internal-expansion type annular space stopper device of the present invention, satisfy and in the annular space space of less radial dimension, realize annular space shutoff requirement.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of internal-expansion type annular space stopper device is provided, to the sealing of the annular space between double-skin duct shutoff, and the radial position of double-skin duct inner and outer pipe is fixed when guaranteeing in the dry type welding chamber to implement underwater dry-type welding maintenance.
The present invention proposes a kind of internal-expansion type annular space stopper device for this reason, and it has:
One inner conical drogue, this inner conical drogue are sheathed on outside the interior pipe of double-skin duct, have a storage tank week in this inner conical drogue rear end, and periphery wall is provided with outside thread;
One external conical sleeve has two half-conical rings at least, and it is sheathed on the above-mentioned inner conical drogue;
One exterior seal ring is sheathed on the inner conical drogue, and is positioned at the rear end of described external conical sleeve;
One extruding nut is screwed together in the outside thread of described inner conical drogue, and is resisted against exterior seal ring;
One inner seal ring ring set and is contained in the storage tank of described inner conical drogue rear end outside the interior pipe of double-skin duct;
One nut back-up ring is screwed together in the outside thread of described inner conical drogue, and front end in week is resisted against above-mentioned inner seal ring in it.
Further, external diameter of pipe is complementary in the internal perisporium diameter of described inner conical drogue and the double-skin duct, and periphery wall is made of bullet and column, and its maximum gauge is less than the double-skin duct outer tube diameter, and described outside thread is arranged on the column place.The periphery wall diameter and the double-skin duct outer tube diameter of described external conical sleeve are complementary, and inner circumferential surface is anterior to be taper, and the rear portion is cylindrical.Wherein, the rear portion of described external conical sleeve can be a full circle nested structure, and the front portion is provided with at least two groovings of opening, and constitutes two halves circular cone ring at least.Described external conical sleeve can also be made of at least two semicircle conical rings.
The characteristics and the advantage of internal-expansion type annular space stopper device of the present invention are:
1, axial rotary extruding rubber exterior seal ring by extruding nut and nut back-up ring and inner seal ring are realized the sealing to the annular space that constitutes between the double-skin duct inner and outer pipe.
2, the axial rotary extruding taper metal piece by the extruding nut makes its distending guarantee the mechanical positioning of annular space stopper device of the present invention in double-skin duct, inner and outer pipe is supported relatively and the sealing of the heart and annular space is finished simultaneously.
3, the present invention is simple in structure, and processing and fabricating is convenient, and reliable working performance is convenient to site operation.
Description of drawings
Fig. 1 is the structure partial cross-sectional schematic of internal-expansion type annular space stopper device specific embodiment of the present invention;
Fig. 2 is the schematic side view of internal-expansion type annular space stopper device specific embodiment of the present invention;
Fig. 3 is another embodiment scheme drawing of the nut back-up ring of internal-expansion type annular space stopper device of the present invention.
The specific embodiment
Below, the present invention is described in further detail by accompanying drawing.
Fig. 1 is a specific embodiment structural representation provided by the present invention, and Fig. 2 is a schematic side view.As shown in the figure, internal-expansion type annular space stopper device of the present invention, it comprises inner conical drogue 1, external conical sleeve 2, rubber exterior seal ring 4, extruding nut 6, O shape inner seal ring 8 and nut back-up ring 7.Described inner conical drogue 1 is sheathed on outside the interior pipe A of double-skin duct, has a storage tank week in this inner conical drogue 1 rear end, and periphery wall is provided with outside thread.Described external conical sleeve 2 has two semicircle conical rings at least, and it is sheathed on the above-mentioned inner conical drogue 1.Described exterior seal ring 4 is sheathed on the inner conical drogue 1, and is positioned at the rear end of described external conical sleeve 2.Described extruding nut 6 is screwed together in the outside thread of inner conical drogue 1, and is resisted against rubber exterior seal ring 4.Described inner seal ring 8 ring sets and are contained in the storage tank of described inner conical drogue 1 rear end outside the interior pipe A of double-skin duct.Above-mentioned nut back-up ring 7 is screwed together in the outside thread of described inner conical drogue 1, and front end in week is resisted against described inner seal ring 8 in it.
Wherein, described inner conical drogue 1 is the full circle nested structure, the external diameter of pipe A be complementary (its size is approaching) in its internal perisporium face size and the double-skin duct.The anterior periphery wall of described inner conical drogue 1 is conical, and the rear portion periphery wall is cylindrical, which is provided with external thread structure.
The periphery wall of described external conical sleeve 2 is cylindrical, the internal diameter of its diameter and double-skin duct outer tube B be complementary (its size is approaching), portion is conical in face of the internal perisporium of this external conical sleeve 2, and the rear portion is cylindrical, thereby makes the rear portion of external conical sleeve 2 corresponding with the cylindrical portion of inner conical drogue 1.
Above-mentioned external conical sleeve 2 can be made of (this external conical sleeve 2 also can watt be made of the awl more than two certainly) at least two semicircle conical rings, move radially between the external conical sleeve 2 that constitutes behind the distending and the inner conical drogue 1 in the slit for preventing that in crumpling process rubber exterior seal ring 4 from embedding by two semicircle conical rings, influence sealing effectiveness, one li back-up ring 3 can be set between external conical sleeve 2 and exterior seal ring 4.Described rubber exterior seal ring 4 and extruding can be provided with an outer back-up ring 5 between the nut 6, and this outer back-up ring 5 and exterior seal ring 4 join the external diameter of contravention smaller or equal to the internal diameter of described double-skin duct outer tube B, and promptly this outer back-up ring 5 can place in the outer tube B of double-skin duct.Above-mentioned external conical sleeve 2 is set on the circular cone of inner conical drogue 1 front end, and lining back-up ring 3, rubber exterior seal ring 4 and outer back-up ring 5 are enclosed within on the face of cylinder of inner conical drogue 1 successively, and presses external conical sleeve 2 by extruding nut 6.Because among the present invention, the rear portion of inner conical drogue 1 is a cylindrical segment, therefore,, can guarantee that they only produce axial motion when in the extruding when back-up ring 3 and exterior seal ring 4, improve sealing property.
As shown in Figure 1, inner seal ring extruding ring set 9 is set in outside the interior pipe A of described double-skin duct, and is contained in the storage tank of described inner conical drogue 1 rear end, and the one end is resisted against inner seal ring 8, and the other end is resisted against the front end in week 70 in the described nut back-up ring 7.In the present embodiment, this inner seal ring extruding ring set 9 is split type with nut back-up ring 7, and it is simple in structure, is easy to processing.
Be equipped with more than one groove on the outside wall surface of above-mentioned extruding nut 6, nut back-up ring 7,, an end of handle 10 can be embedded in it, be convenient to fastening this extruding nut 6, nut back-up ring 7 by this groove.
By above-mentioned handle 10 rotation extruding nuts 6 can make external conical sleeve 2 distendings with realize the annular space stopper in annular space mechanical positioning and be that inner and outer pipes provides relative support, make the inner and outer pipe of double-skin duct keep coaxial.The rotation of extruding nut 6 is also pushed exterior seal ring 4 and is realized sealing between the inside face of the external cylindrical surface of inner conical drogue 1 and outer tube B.
By above-mentioned handle 10 swivel nut back-up rings 7 can push inner seal ring 8 realize in sealing between the inside face of the outside face of pipe A and inner conical drogue 1.
Another possible embodiments of described external conical sleeve 2 is, the rear portion of this external conical sleeve 2 is a full circle nested structure (not shown), and the cylindrical outer diameter of its internal diameter and inner conical drogue 1 is complementary, and the front portion of external conical sleeve 2 is provided with at least two groovings of opening, and constitutes two halves circular cone ring at least.Need not between described exterior seal ring 4 and this external conical sleeve 2 to be provided with above-mentioned in back-up ring.
Another possible embodiments of described extruding nut 6 is, described extruding nut 6 can be with described outer back-up ring 5 and is wholely set (not shown), promptly the front end at extruding nut 6 extends a top, this top is resisted against exterior seal ring 4, itself and exterior seal ring 4 join the external diameter of contravention smaller or equal to described double-skin duct outer tube diameter, that is, this top can place in the outer tube B of double-skin duct, and the internal diameter of described top can be slightly larger than the external diameter of inner conical drogue.Adopt the structure of present embodiment, can reduce number of parts, be convenient to construction operation.
Another possible embodiments of described nut back-up ring 7 is: as shown in Figure 3, described nut back-up ring 7 ' can be structure as a whole with inner seal ring extruding ring set 9, promptly, the front end in week 70 ' extends an extrusion ring 9 ' forward in the nut back-up ring 7 ', this extrusion ring 9 ' is resisted against described inner seal ring 8, inwall 71 ' the diameter of described extrusion ring 9 ' is more than or equal to the external diameter of pipe A in the described double-skin duct, constitute an embedding slot 72 ' between its outer wall and the nut back-up ring, the threaded portion of outer wall 73 ' for matching with described inner conical drogue 1 outside thread of this embedding slot 72 ', the inwall 74 ' diameter of caulking groove is smaller or equal to the diameter of inner conical drogue storage tank.This structure decrease number of parts, be beneficial to construction operation.
The present invention in maintenance activity the concrete operations step be:
1) inner conical drogue 1 being enclosed within interior pipe A upward also suitably pushes in the annular space;
2) respectively two semicircle conical rings are aligned on the circular cone of inner conical drogue 1 front end;
3) be inserted in successively in back-up ring 3, rubber exterior seal ring 4 and outer back-up ring 5;
4) be screwed into extruding nut 6, use above-mentioned all parts of handle 10 swivel nut jam-packeds again;
5) be inserted in O shape inner seal ring 8 and O shape inner seal ring extrusion ring 9 at interior pipe A and 1 of inner conical drogue, be screwed into nut back-up ring 7 again, with handle 10 swivel nut back-up rings 7 jam-packed O-ring seals.
The external conical sleeve that described extruding nut 6 makes its axial compression be made of two half cone-shaped metal pieces by handle 10 rotations, it is moved on the circular conical surface of inner conical drogue 1, make the outside face of two half cone-shaped metal pieces radially be adjacent to outer pipe internal surface, pushing inner conical drogue 1 generation elastic deformation simultaneously makes its inner surface radial direction be adjacent to interior pipe A outside face, realize the relative support of inner and outer pipes and, guarantee the mechanical positioning of internal-expansion type annular space stopper in annular space the heart; The rotation of extruding nut 6 also make simultaneously its axial compression be clipped in the rubber elastic element (exterior seal ring 4) of 5 of back-up ring 3 and outer back-up rings, make this exterior seal ring 4 produce distortion, realize that the annular space between inner conical drogue 1 and outer tube B inside face seals.
Described nut back-up ring 7 by handle 10 rotation make its axial compression O shape inner seal ring realize in the sealing of 1 of pipe A outside face and inner conical drogue.
The leak free of the annular space that between realizing, constitutes to the double-skin duct inner and outer pipe simultaneously, internal-expansion type annular space stopper device of the present invention also realized to the relative support of the inner and outer pipes of double-skin duct and to the heart and device proper the mechanical positioning in annular space.
The above only is the specific embodiment of invention, and when not limiting scope of the invention process with this, i.e. equivalent variations and the modification of doing according to the present patent application claim and description generally all should still belong in the scope that patent of the present invention contains.
Claims (10)
1, a kind of internal-expansion type annular space stopper device is characterized in that described stopper device has:
One inner conical drogue, this inner conical drogue are sheathed on outside the interior pipe of double-skin duct, have a storage tank week in this inner conical drogue rear end, and periphery wall is provided with outside thread;
One external conical sleeve has two half-conical rings at least, and it is sheathed on the above-mentioned inner conical drogue;
One exterior seal ring is sheathed on the inner conical drogue, and is positioned at the rear end of described external conical sleeve;
One extruding nut is screwed together in the outside thread of described inner conical drogue, and is resisted against exterior seal ring;
One inner seal ring ring set and is contained in the storage tank of described inner conical drogue rear end outside the interior pipe of double-skin duct;
One nut back-up ring is screwed together in the outside thread of described inner conical drogue, and front end in week is resisted against above-mentioned inner seal ring in it.
2, internal-expansion type annular space stopper device as claimed in claim 1, it is characterized in that: external diameter of pipe is complementary in the internal perisporium diameter of described inner conical drogue and the double-skin duct, periphery wall is made of bullet and column, its maximum gauge is less than the double-skin duct outer tube diameter, and described outside thread is arranged on the column place.
3, internal-expansion type annular space stopper device as claimed in claim 1 is characterized in that: the periphery wall diameter and the double-skin duct outer tube diameter of described external conical sleeve are complementary, and inner circumferential surface is anterior to be taper, and the rear portion is cylindrical.
4, internal-expansion type annular space stopper device as claimed in claim 3 is characterized in that: the rear portion of described external conical sleeve is a full circle nested structure, and the front portion is provided with at least two groovings of opening, and constitutes two halves circular cone ring at least.
5, internal-expansion type annular space stopper device as claimed in claim 3, it is characterized in that: described external conical sleeve is made of at least two semicircle conical rings.
6, as claim 1,2,3,5 described internal-expansion type annular space stopper devices, it is characterized in that: be provided with one li back-up ring between described exterior seal ring and the external conical sleeve.
7, as each described internal-expansion type annular space stopper device of claim 1 to 5, it is characterized in that: be provided with an outer back-up ring between described exterior seal ring and the extruding nut, should can place in the outer tube of described double-skin duct by outer back-up ring, and the outside wall surface of extruding nut is provided with more than one groove.
8, as each described internal-expansion type annular space stopper device of claim 1 to 5, it is characterized in that: described extruding nut front end extends a top, this top and exterior seal ring join the external diameter of contravention smaller or equal to described double-skin duct outer tube diameter, and the outside wall surface of extruding nut is provided with more than one groove.
9, as each described internal-expansion type annular space stopper device of claim 1 to 5, it is characterized in that: an inner seal ring extrusion ring cover is set in outside the interior pipe of described double-skin duct, and be contained in the storage tank of described inner conical drogue rear end, the one end is resisted against inner seal ring, and the other end is resisted against described nut back-up ring; The outside wall surface of described nut back-up ring is provided with more than one groove.
10, as each described internal-expansion type annular space stopper device of claim 1 to 5, it is characterized in that: described nut back-up ring extends an extrusion ring forward, this extrusion ring is resisted against described inner seal ring, the inner diameter of described extrusion ring is more than or equal to external diameter of pipe in the described double-skin duct, constitute an embedding slot between its outer wall and the nut back-up ring, the threaded portion of the outer wall of this embedding slot for matching with described inner conical drogue outside thread, the inner diameter of caulking groove is smaller or equal to the diameter of inner conical drogue storage tank; The outside wall surface of described nut back-up ring is provided with more than one groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410045579XA CN100384694C (en) | 2004-06-07 | 2004-06-07 | Inner expanding annular space stopper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410045579XA CN100384694C (en) | 2004-06-07 | 2004-06-07 | Inner expanding annular space stopper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1706716A true CN1706716A (en) | 2005-12-14 |
| CN100384694C CN100384694C (en) | 2008-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410045579XA Expired - Fee Related CN100384694C (en) | 2004-06-07 | 2004-06-07 | Inner expanding annular space stopper |
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| Country | Link |
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| CN (1) | CN100384694C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100378395C (en) * | 2005-12-29 | 2008-04-02 | 中国海洋石油总公司 | Automatic deseal device of pipeline pluger |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900893B (en) * | 2012-10-25 | 2014-11-26 | 中国海洋石油总公司 | Plugging device and plugging method for annular space of submarine double-layer oil conveying pipe |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1217739A (en) * | 1967-05-23 | 1970-12-31 | Claude Ralet | Improvements in or relating to connectors for pipes or electrical cables |
| ATE83056T1 (en) * | 1987-03-25 | 1992-12-15 | Manibs Spezialarmaturen | CLAMP CONNECTION FOR PRESSURE PIPES. |
| CN2193920Y (en) * | 1993-09-11 | 1995-04-05 | 田炳周 | Simple casing joint |
| CN2223795Y (en) * | 1994-12-08 | 1996-04-03 | 李晓军 | Device for flexible sealing and joining pipe line |
| CN2328846Y (en) * | 1997-08-17 | 1999-07-14 | 吴文伦 | Pipe joint |
| CN2455611Y (en) * | 2000-11-23 | 2001-10-24 | 徐振昭 | Drainage pipe for repairing ship in dock |
| CN2512976Y (en) * | 2001-12-20 | 2002-09-25 | 新疆五家渠公众信息产业有限责任公司 | Pipeline blocking device |
| CN2711503Y (en) * | 2004-06-07 | 2005-07-20 | 中国海洋石油总公司 | Intenral expansion type annular stopper device |
-
2004
- 2004-06-07 CN CNB200410045579XA patent/CN100384694C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100378395C (en) * | 2005-12-29 | 2008-04-02 | 中国海洋石油总公司 | Automatic deseal device of pipeline pluger |
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| Publication number | Publication date |
|---|---|
| CN100384694C (en) | 2008-04-30 |
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Granted publication date: 20080430 Termination date: 20120607 |