GB2222647A - A pipe jointing or closing device - Google Patents
A pipe jointing or closing device Download PDFInfo
- Publication number
- GB2222647A GB2222647A GB8817014A GB8817014A GB2222647A GB 2222647 A GB2222647 A GB 2222647A GB 8817014 A GB8817014 A GB 8817014A GB 8817014 A GB8817014 A GB 8817014A GB 2222647 A GB2222647 A GB 2222647A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sleeve
- clamping ring
- pipe
- tubular body
- elastomeric sleeve
- 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.)
- Granted
Links
Classifications
-
- 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
- F16L23/00—Flanged joints
- F16L23/04—Flanged joints the flanges being connected by members tensioned in the radial plane
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Description
A PIPE JOINTING OR CLOSING DEVICE
THIS INVENTION relates to a device for jointing or closing ends of pipes such as gas pipes and water pipes.
Devices of this kind must be designed to conform very closely with the outer diameter of pipes to be joined or capped thus to ensure a water tight or gas tight seal.
They may be fitted to existing underground mains some of which may be 100 years old or more, and it is difficult with conventional devices to ensure that they will always provide an adequate seal. Owing to changing standards, materials, manufacturing techniques and corrosion, pipes of the same nominal diameter can vary widely in actual diameter. Therefore it is desired that the device should be able to accommodate wide variations and differences in pipe diameter.
An object of the invention is to provide such a device in a simple and lightweight construction.
According to the present invention there is provided a device for jointing or closing pipe ends, comprising a rigid or semi-rigid tubular body, an elastomeric sleeve located within the body and having at least at one end and protruding from the body, a resilient annular collar ; a clamping ring with means for tightening same around said resilient collar thus to compress same and
force it into sealing engagement with the wall of a pipe
inserted into said sleeve ; and one or more wedge-like
members lcoated between the clamping ring and the collar
and arranged to slide with respect to the internal surface
of the ring as the latter is tightened thus to force the
resilient collar radially inwards ensuring a substantially
uniform radial compression of the collar around said pipe
wall.
A device made in accordance with the invention
will now be described, by way of example, with reference to
the accompanying drawings in which:
Fig. 1 is an exploded view of the parts of the
device ;
and Fig. 2 is an end view of the assembled device.
II-II of Fig. 1 with the device assembled.
The device consists of a rigid or semi-rigid tubular body 10 having at least one end open with a pair of locating lugs 11 extending axially therefrom. Within the body 10 is an elastomeric sleeve 12 which although shown split for the purpose of illustration is preferably of tubular form open only at one or both ends, and having at least at one end an integral resilient collar 13 of increased thickness. Preferably the sleeve 12 is arranged to be a close fit within the body 10, with the collar 13 located close to the end of the body when inserted. It should be noted that this device may form either a twoended jointing device in which case the body 10 and sleeve 12 are double-ended, or alternatively it may be adapted for
capping the end of a pipe in which case the far ends of the
body and sleeve as illustrated, will be closed by
respective end walls.
Thus, accordingly, at the or each end of the device there is provided a clamping ring which in the embodiment shown consists of a pair of generally semicircular ring segments 14 generally of channel form to surround and retain a substantial part of the circumference of collar 13.
Clamping bolts 15 pass through lugs 16 of segments
14 and through lugs 11 of body 10 and are tightened by nuts
17.
A pair of wedge-like members 18 having radially inwardly directed arcuate-surfaces 19 of similar form to the internal channel formations of segments 14, are located during assembly between the segments 14 and the collar 13 in the regions of the clampling bolts 15 and lugs 16. It will be seen that members 18 have outwardly facing key-way protrusions 20 which locate in the channel formations of the adjacent surfaces of segments 14.
For assembly therefore a pipe end (not shown) is
located within sleeve 12 which itself is within body 10.
Segments 14 and wedge-like members 18 are located around
the collar 13 of sleeve 12 and then bolts 15 and nuts 17
are tightened to draw the segments together, whereupon the
protrusions 20 of wedges 18 undergo a generally tangential
sliding motion with respect to the internal surfaces of
segments 14 such that the wedges 18 move radially inwards
ensuring a substantially uniform radial compression of the
collar 13 around the entire circumference of the pipe wall.
It will be appreciated that only the internal
surface of sleeve 12 will be in direct contact with the
fluid within the pipe, whilst the body 12 merely acts as a
restraining device (as does the outer wall of a tyre around
an inner tube). This feature is particularly important
when the device is used with certain"aggressive"fluids
such that they cannot come into contact with any of the
relatively moving parts of the device. Furthermore, it is
unnecessary to ensure a seal between the outer surface of
sleeve 12 and the body, the sleeve itself in a jointing
device, forming the coupling.
The substantially uniform tightening provided by the assembly of the device enables it to be used on a wide
range of pipe sizes. Indeed, a single such device may be applied to pipes differing by as much as 30mm in actual diameter.
The sleeve 12 is preferably of nitrile rubber whilst the body 10 may be of metal or a lightweight and inert material such as polypropylene. The lugs 11 which serve mainly to hold the unit together before and during assembly, may, in some cases, be omitted.
Claims (11)
- CLAIMS 1. A device for jointing or closing pipe ends, comprising a rigid or semi-rigid tubular body, an elastomeric sleeve located within the body and having at least one end protruding axially from the body ; a clamping ring with means in at least one circumferential position thereon for tightening same around the axial protrusion of the sleeve thus to compress same and force it into sealing engagement with the external wall surface of a pipe inserted into said sleeve.
- 2. A device according to Claim 1, further including one or more wedge-like members located radially between the clamping ring and the axial protrusion of the sleeve in said at least one position and arranged to slide with respect to the adjacent internal surface of the ring as the latter is tightened thus to force the or each wedge-like member-radially inwards against the sleeve ensuring a substantially uniform radial compression of the thereof around said pipe wall.
- 3. A device according to Claim 2, wherein the axial protrusion of the elastomeric sleeve is formed as a resilient annular collar, and wherein said clamping ring comprises a pair of generally semi-circular ring segments of internal channel form to surround and retain a substantial part of the circumference of the resilient annular collar, there being two diametrically opposed wedge-like members between the clamping ring and the resilient annular collar in the adjacent end regions of the ring segments.
- 4. A device according to Claim 3, wherein each wedge- like member has a radially inwardly directed arcuate surface of channel form adapted to receive the resilient annular collar of the elastomeric sleeve.
- 5. A device according to Claim 3, wherein each wedgelike member includes a pair of outwardly facing key way protrusions which locate in the internal channel formations of the ring segments.
- 6. A device according to Claim 3, wherein said tightening means for said clamping ring comprises one or more pairs of opposed apertured lugs on said ring segments and one or more fixing bolts engaged within the apertures.
- 7. A device according to Claim 6, including one or more complementary apertured lugs extending axially from at least one end of the rigid or semi-rigid tubular body and arranged to be aligned with the apertured lugs of the clamping ring thus further to receive the fixing bolt or bolts.
- 8. A device according to any preceding claim for jointing a pair of pipe ends and in which said tubular body is open at both ends and said elastomeric sleeve has, at each end thereof, an axial protrusion, there being a split clamping ring adapted for attachment at each end of the device.
- 9. A device according to any one of Claims 1 to 7, for closing a pipe end, in which said tubular body and elastomeric sleeve have complementary closed ends, the other ends being open and adapted to receive said clamping ring.
- 10. A device according to any preceding claim in which the tubular body is of metal or lightweight and inert material such as polypropylene.
- 11. A device according to any preceding claim, in which said elastomeric sleeve is of nitrile rubber.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8989307102T DE68905254T2 (en) | 1988-07-16 | 1989-07-13 | A PIPE CONNECTION OR LOCKING DEVICE. |
AT89307102T ATE86725T1 (en) | 1988-07-16 | 1989-07-13 | A PIPE CONNECTION OR CLOSING DEVICE. |
EP89307102A EP0352018B1 (en) | 1988-07-16 | 1989-07-13 | A pipe jointing or closing device |
IE229089A IE63013B1 (en) | 1988-07-16 | 1989-07-14 | "A pipe jointing or closing device" |
US07/486,370 US5037141A (en) | 1988-07-16 | 1990-02-28 | Pipe jointing or closing device |
CA002011345A CA2011345C (en) | 1988-07-16 | 1990-03-02 | Pipe jointing or closing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002011345A CA2011345C (en) | 1988-07-16 | 1990-03-02 | Pipe jointing or closing device |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8817014D0 GB8817014D0 (en) | 1988-08-17 |
GB2222647A true GB2222647A (en) | 1990-03-14 |
GB2222647B GB2222647B (en) | 1992-06-17 |
Family
ID=4144439
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8817014A Expired - Fee Related GB2222647B (en) | 1988-07-16 | 1988-07-16 | A pipe jointing or closing device |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2222647B (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB328402A (en) * | 1929-03-22 | 1930-05-01 | Dunlop Rubber Co | Improvements in or relating to the joints of pipes for roadways |
GB576773A (en) * | 1944-11-22 | 1946-04-17 | Robert Cuthbert Scott Jamie | Improvements in or relating to pipe joints |
-
1988
- 1988-07-16 GB GB8817014A patent/GB2222647B/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB328402A (en) * | 1929-03-22 | 1930-05-01 | Dunlop Rubber Co | Improvements in or relating to the joints of pipes for roadways |
GB576773A (en) * | 1944-11-22 | 1946-04-17 | Robert Cuthbert Scott Jamie | Improvements in or relating to pipe joints |
Also Published As
Publication number | Publication date |
---|---|
GB2222647B (en) | 1992-06-17 |
GB8817014D0 (en) | 1988-08-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20020716 |