WO1986007125A1 - Ring-shaped flat gaskets for propulsive pipes - Google Patents
Ring-shaped flat gaskets for propulsive pipes Download PDFInfo
- Publication number
- WO1986007125A1 WO1986007125A1 PCT/EP1986/000315 EP8600315W WO8607125A1 WO 1986007125 A1 WO1986007125 A1 WO 1986007125A1 EP 8600315 W EP8600315 W EP 8600315W WO 8607125 A1 WO8607125 A1 WO 8607125A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gasket
- ring
- pipe
- propulsive
- pipes
- Prior art date
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
- F16L21/00—Joints with sleeve or socket
- F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
-
- 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
- F16L21/00—Joints with sleeve or socket
- F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
- F16L21/035—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings placed around the spigot end before connection
Definitions
- the present invention concerns a cylin- drically shaped flat-ring gasket of elastomeric material and its use for sealing propulsion-type pipes, having a spigot provided at the pipe end along with a connect- ing sleeve enclosing the gasket.
- spigot-ended pipes i.e. pipes provided with the end section of an outer diameter smaller than that of the pipe
- the pipes are joined by means of connecting sleeves enclosing the spigots.
- a so-called slip-ring gasket is installed between the connecting sleeve and the spigot on the pipe end or in the groove of the spigot, as described, for example, by D. Stein et al in Pipes and Pipelines International, July/August 1983, pp. 7 to 13.
- a connecting and sealing element for service pipes in which two pipe ends, are joined together tightly and tensionally by means of a pipe sleeve extending over these latter.
- the sealing element on each end on the internal and external periphery thereof, is provided with a bulge ' comprising a narrow neck and laminations which protrude on the upright fins both internal and external peri ⁇ phery, and which are higher than the bulges.
- These laminations engage circumferentially provided grooves of the connecting sleeve and, in the mounted state they are under pressure.
- the bulges engage corres ⁇ ponding grooves provided in the connecting sleeve and in the outside of the wall pipe thereby providing a safe fit of the sealing element.
- this type of gasket is not suitable for use with so-called propulsive pipes due to the necessary grooves in the connecting sleeve and in the pipe ends, because in propulsion technology, cylin- drically-shaped connecting sleeves are employed with relatively low wall diameters in which grooves could only be made at a high cost.
- the present invention provides a speci ⁇ fically flat ring-gasket for use with propulsion- -type, spigot-ended pipes which can be easily mounted on the pipe spigot and whose sealing capacity is superior to that of conventional slip-ring gaskets.
- Deficiencies of known gaskets are overcome by the use of annular, cylindrically-shaped flat-ring gaskets of elastomeric material, comprising a plurality of spaced- -apart circumferenti l bulges of semi-circular cross- -section that are disposed on the continuous flat-ring gasket and are directed outwardly, with the lateral outer bulges terminating flatly toward the ends of the gasket as gaskets for propulsion-type pipes having spigots at the pipe ends the outer diameters of which are smaller than the pipe diameter.
- the gasket is placed on the smooth spigot and, under pressure, is enclosed by the sleeve of the matching pipe.
- the basic body of the cylin- drically-shaped flat-ring gasket, in cross-section, is of a spherical configuration.
- a circumferential rack- -type profile is formed to assure a better fit of the gasket under pressure on the outer pipe wall.
- the gaskets are secured to the spigots of the propulsion pipes by means of an adhesive.
- connecting sleeve of a pipe is secured to the spigot by applying adhesive or by shrinkage, it is necessary only to provide a gasket on the spigot of the pipe to be inserted into the connecting sleeve.
- the cross-section of the cylindrically-shaped basic body of the flat-ring gasket is slightly spherical in configuration.
- the gasket to have, circumferentially, a rack-type profile on the inner side facing the pipe spigot.
- Such a profile facilitates the anchoring operation, improving adherence of the gasket to the pipe spigot.
- Such anchoring can be effected by an adhesive or a fast-curing molding material. It is preferred, especially with propulsive pipes made of glass fiber-reinforced plastic material to use dual-component adhesives such as epoxy resin adhesives.
- Materials used for gaskets include synthetic elastomers, chloroprene rubber, other natural and synthetic rubbers, fluoropolymers of adequate durability and flexibility so as to deform under pressure the con ⁇ necting sleeve so that the necessary sealing effect is achieved.
- the specifically formed flat-ring gaskets of the present invention comprise a cylindrically- -shaped basic body having a width of between 40 and 140 mm, preferably between 60 and 110 mm.
- the thickness in the area of the bulges provided on the outer surface and being semi-circular in cross-section, is between 2.5 and 20 mm, and the groove depth between the bulges is between 1 and 16 mm, preferably, between 1 and 8 nun.
- the inside diameter of the cylindrically- -shaped basic body depends on the outer diameter of the pipe spigot of the propulsion pipe which, 'in respect of sewage pipes, can be between 340 and 1730 ram, depending on ' the nominal diameter of the pipe.
- the space between two of the bulges on the gasket, i.e. the groove width, corresponds to twice the radius of the bulges plus 3 mm.
- the number of round profiles or bulges on the cylindrically-shaped basic body is between 5 and 12/ preferably 6 to 8, with the circumferential round profiles being arranged at the distance referred to above.
- the round profiles or bulges disposed on the two lateral ends externally extend flatly toward the gasket ends.
- the figure 1 illustrates a sectional view of the arrangement of the gasket on spigot 2 of a spigot- -ended pipe 3.
- the end of the one pipe provided with the spigot 1 is inserted into the connecting sleeve 4 of the connecting pipe 5.
- the connecting sleeve 4 is secured to the spigot end of the spigot-ended pipe by means of adhesive or by shrinkage thereby eliminat- ing the need for a seal between the connecting sleeve and the external wall of the pipe.
- Gasket 1 is under pressure from the connecting sleeve 4 so that the elasticity of the gasket material produces a top-sided flattening and a lateral expansion of the bulges.
- gasket 1 is secured to spigot 2 of the pipe by means of an adhesive.
- the figure 2 illustrates a sectional view of the embodiment of the gasket 1 with the plurality of spaced-apart, out ⁇ wardly directed circumferential bulges 7 of semi-circular cross-section disposed on the continuous cylindrical flat- ring gasket, with the lateral external bulges extending flatly toward the gasket end and with a circumferential rack-type profile 6 on the internal side of the flat-ring gasket facing the spigot on the propulsive pipe later on.
- a special advantage involved therewith resides in that the specifically formed flat-ring gaskets do not require any specifically shaped spigots on the pipe ends or specifically shaped connecting sleeves. They can be easily pushed over the spigots of the pipe and, optionally, be secured by an adhesive.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints With Sleeves (AREA)
- Gasket Seals (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The specially shaped flat-ring gasket (1) for use with propulsion-type pipes. The gasket (1) comprises an annular cylindrically-shaped flat-ring gasket (1) made of an elastomeric material. Plurality of spaced-apart circumferential bulges (7) of semi-circular cross-section are disposed on the continuous flat-ring gasket and are directed outwardly, with lateral bulges terminating flatly toward the ends of the product. The gaskets are placed on the smooth spigot (2) of the pipe and under pressure are enclosed by the sleeve (4) of the matching pipe. The flat-ring gaskets of this invention provide improved sealings of the propulsion-type pipes.
Description
RING-SHAPED FLAT GASKETS FOR PROPULSIVE PIPES
The present invention concerns a cylin- drically shaped flat-ring gasket of elastomeric material and its use for sealing propulsion-type pipes, having a spigot provided at the pipe end along with a connect- ing sleeve enclosing the gasket.
During laying of so-called spigot-ended pipes, i.e. pipes provided with the end section of an outer diameter smaller than that of the pipe, the pipes are joined by means of connecting sleeves enclosing the spigots. As a rule, a so-called slip-ring gasket is installed between the connecting sleeve and the spigot on the pipe end or in the groove of the spigot, as described, for example, by D. Stein et al in Pipes and Pipelines International, July/August 1983, pp. 7 to 13. Providing a groove for the slip-ring gasket on the spigot ends of the pipes, of necessity, results in weakening of the pipe wall so that in difficult conditions of propulsion, damages to the pipe in the area of connection are repeatedly observed
causing, in the long-term, undesirable leakages. With¬ out the groove the sealing capacity of a simple slip-ring gasket is frequently inadequate.
From DE-OS 1,475,807, a connecting and sealing element is known for service pipes in which two pipe ends, are joined together tightly and tensionally by means of a pipe sleeve extending over these latter. The sealing element, on each end on the internal and external periphery thereof, is provided with a bulge ' comprising a narrow neck and laminations which protrude on the upright fins both internal and external peri¬ phery, and which are higher than the bulges. These laminations engage circumferentially provided grooves of the connecting sleeve and, in the mounted state they are under pressure. The bulges engage corres¬ ponding grooves provided in the connecting sleeve and in the outside of the wall pipe thereby providing a safe fit of the sealing element.
However, this type of gasket is not suitable for use with so-called propulsive pipes due to the necessary grooves in the connecting sleeve and in the pipe ends, because in propulsion technology, cylin- drically-shaped connecting sleeves are employed with relatively low wall diameters in which grooves could only be made at a high cost.
The present invention provides a speci¬ fically flat ring-gasket for use with propulsion- -type, spigot-ended pipes which can be easily mounted on the pipe spigot and whose sealing capacity is superior to that of conventional slip-ring gaskets.
Deficiencies of known gaskets are overcome by the use of annular, cylindrically-shaped flat-ring gaskets of elastomeric material, comprising a plurality of spaced- -apart circumferenti l bulges of semi-circular cross- -section that are disposed on the continuous flat-ring gasket and are directed outwardly, with the lateral outer bulges terminating flatly toward the ends of the gasket as gaskets for propulsion-type pipes having spigots at the pipe ends the outer diameters of which are smaller than the pipe diameter. The gasket is placed on the smooth spigot and, under pressure, is enclosed by the sleeve of the matching pipe.
Preferably, the basic body of the cylin- drically-shaped flat-ring gasket, in cross-section, is of a spherical configuration. In one form of embodi¬ ment, on the inner side of the cyclindrically-shaped body facing the pipe spigot, a circumferential rack- -type profile is formed to assure a better fit of the gasket under pressure on the outer pipe wall.
Preferably, the gaskets are secured to the spigots of the propulsion pipes by means of an adhesive.
If the connecting sleeve of a pipe is secured to the spigot by applying adhesive or by shrinkage, it is necessary only to provide a gasket on the spigot of the pipe to be inserted into the connecting sleeve.
However, it is also possible to provide at both abutting ends of the pipes respectively one of the gaskets of this invention which pipe ends are then jointly enclosed by a connecting sleeve extending over the full length of the pipe spigots. This connecting sleeve has an
external diameter corresponding to the external diameter of the propulsion pipes, with the internal diameter being such that pressure is exerted on the gasket.
To facilitate insertion of a spigot provided with a gasket into the pipe end of another pipe fur¬ nished with a connecting sleeve, the cross-section of the cylindrically-shaped basic body of the flat-ring gasket is slightly spherical in configuration. For an improved fit on the pipe wall it is advantageous "for the gasket to have, circumferentially, a rack-type profile on the inner side facing the pipe spigot. Such a profile, at the same time, facilitates the anchoring operation, improving adherence of the gasket to the pipe spigot. Such anchoring can be effected by an adhesive or a fast-curing molding material. It is preferred, especially with propulsive pipes made of glass fiber-reinforced plastic material to use dual-component adhesives such as epoxy resin adhesives.
Materials used for gaskets include synthetic elastomers, chloroprene rubber, other natural and synthetic rubbers, fluoropolymers of adequate durability and flexibility so as to deform under pressure the con¬ necting sleeve so that the necessary sealing effect is achieved.
The specifically formed flat-ring gaskets of the present invention comprise a cylindrically- -shaped basic body having a width of between 40 and 140 mm, preferably between 60 and 110 mm. The thickness in the area of the bulges provided on the outer surface and being semi-circular in cross-section, is between
2.5 and 20 mm, and the groove depth between the bulges is between 1 and 16 mm, preferably, between 1 and 8 nun.
The inside diameter of the cylindrically- -shaped basic body depends on the outer diameter of the pipe spigot of the propulsion pipe which, 'in respect of sewage pipes, can be between 340 and 1730 ram, depending on' the nominal diameter of the pipe. The space between two of the bulges on the gasket, i.e. the groove width, corresponds to twice the radius of the bulges plus 3 mm. The number of round profiles or bulges on the cylindrically-shaped basic body is between 5 and 12/ preferably 6 to 8, with the circumferential round profiles being arranged at the distance referred to above. The round profiles or bulges disposed on the two lateral ends externally extend flatly toward the gasket ends.
The figure 1 illustrates a sectional view of the arrangement of the gasket on spigot 2 of a spigot- -ended pipe 3. The end of the one pipe provided with the spigot 1 is inserted into the connecting sleeve 4 of the connecting pipe 5. The connecting sleeve 4 is secured to the spigot end of the spigot-ended pipe by means of adhesive or by shrinkage thereby eliminat- ing the need for a seal between the connecting sleeve and the external wall of the pipe. Gasket 1 is under pressure from the connecting sleeve 4 so that the elasticity of the gasket material produces a top-sided flattening and a lateral expansion of the bulges. In the example of the embodiment, gasket 1 is secured to spigot 2 of the pipe by means of an adhesive.
The figure 2 illustrates a sectional view of the embodiment of the gasket 1 with the plurality of spaced-apart, out¬ wardly directed circumferential bulges 7 of semi-circular cross-section disposed on the continuous cylindrical flat- ring gasket, with the lateral external bulges extending flatly toward the gasket end and with a circumferential rack-type profile 6 on the internal side of the flat-ring gasket facing the spigot on the propulsive pipe later on.
The above-described special flat-ring gaskets are particularly suitable for propulsive pipes of glass fiber-reinforced plastic material. However, basically, these gaskets can also be employed for propulsive! pipes made of other materials such as cement. •
A special advantage involved therewith resides in that the specifically formed flat-ring gaskets do not require any specifically shaped spigots on the pipe ends or specifically shaped connecting sleeves. They can be easily pushed over the spigots of the pipe and, optionally, be secured by an adhesive.
Claims
1. A ring-shaped flat gasket of an elastomeric material for propulsive pipes having spigots, the external diameter of which is smaller than the pipe diameter, characterized in that, a plurality of spaced-apart, outwardly directed circumferential bulges of semi-
-circular cross-section are disposed on the continuous cylindrical flat-ring gasket with the lateral external bulges extending flatly toward the gasket end.
2. The ring-shaped flat gasket of Claim 1, characterized in that, the cylindrical flat-ring gasket is spherical in cross-section.
3. The ring-shaped flat gasket of Claims 1 or 2, characterized in that, the flat-ring gasket has a circumferential rack-type profile on the internal side facing the spigot on the propulsive pipe.
4. Use of the ring-shaped flat gasket of Claims 1-3 as a gasket for propulsive pipes, charac¬ terized by disposing the gasket on the smooth spigot of the propulsive pipe and enclosing it by the con- necting sleeve of the matching pipe under pressure.
5. Use of Claim 4, characterized in that, the gasket is secured to the spigot of the propulsive pipe by an adhesive.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR8606687A BR8606687A (en) | 1985-05-25 | 1986-05-23 | FLAT-RING GASKET FOR PROPULSE PIPES |
KR870700055A KR880700203A (en) | 1985-05-25 | 1987-01-24 | Flat ring gasket for propulsion pipe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853518895 DE3518895A1 (en) | 1985-05-25 | 1985-05-25 | USE OF A RING SHAPED SEAL FOR DRIVE PIPES |
DEP3518895.2 | 1985-05-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1986007125A1 true WO1986007125A1 (en) | 1986-12-04 |
Family
ID=6271663
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1986/000315 WO1986007125A1 (en) | 1985-05-25 | 1986-05-23 | Ring-shaped flat gaskets for propulsive pipes |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0225353A1 (en) |
JP (1) | JPS62500878A (en) |
KR (1) | KR880700203A (en) |
AU (1) | AU5996286A (en) |
BR (1) | BR8606687A (en) |
DE (1) | DE3518895A1 (en) |
WO (1) | WO1986007125A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4060212A1 (en) * | 2021-03-18 | 2022-09-21 | Uponor Innovation AB | Pipe connection and method of producing pipe connection |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2615740A (en) * | 1948-09-03 | 1952-10-28 | Hamilton Kent Mfg Company | Sealing ring |
FR2139688A1 (en) * | 1971-05-28 | 1973-01-12 | Pont A Mousson Fond | |
GB1393363A (en) * | 1971-08-24 | 1975-05-07 | Spun Concrete Ltd | Pipe joints |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB985130A (en) * | 1964-01-14 | 1965-03-03 | Jack Richard Baittinger | Improvements in and relating to joints for pile shells and the like |
DE1475807A1 (en) * | 1965-08-19 | 1969-09-18 | Ruehle Dipl Ing Alfred | Connection and sealing element for pipe connections |
DE2945554C2 (en) * | 1979-11-10 | 1986-05-07 | Hochtief Ag Vorm. Gebr. Helfmann, 4300 Essen | Pipe coupling for ramming pipes divided into pipe sections |
DE8504043U1 (en) * | 1985-02-11 | 1985-05-09 | Eternit Ag, 1000 Berlin | Sealing sleeve |
-
1985
- 1985-05-25 DE DE19853518895 patent/DE3518895A1/en active Granted
-
1986
- 1986-05-23 AU AU59962/86A patent/AU5996286A/en not_active Abandoned
- 1986-05-23 EP EP86903348A patent/EP0225353A1/en not_active Withdrawn
- 1986-05-23 JP JP61503461A patent/JPS62500878A/en active Pending
- 1986-05-23 WO PCT/EP1986/000315 patent/WO1986007125A1/en not_active Application Discontinuation
- 1986-05-23 BR BR8606687A patent/BR8606687A/en unknown
-
1987
- 1987-01-24 KR KR870700055A patent/KR880700203A/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2615740A (en) * | 1948-09-03 | 1952-10-28 | Hamilton Kent Mfg Company | Sealing ring |
FR2139688A1 (en) * | 1971-05-28 | 1973-01-12 | Pont A Mousson Fond | |
GB1393363A (en) * | 1971-08-24 | 1975-05-07 | Spun Concrete Ltd | Pipe joints |
Also Published As
Publication number | Publication date |
---|---|
JPS62500878A (en) | 1987-04-09 |
BR8606687A (en) | 1987-08-11 |
DE3518895A1 (en) | 1986-11-27 |
AU5996286A (en) | 1986-12-24 |
KR880700203A (en) | 1988-02-20 |
EP0225353A1 (en) | 1987-06-16 |
DE3518895C2 (en) | 1987-06-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3235293A (en) | Glass pipe coupling | |
US5169161A (en) | Symmetrical gasket for pipe joints | |
US4480860A (en) | Transition coupling and clamp assembly containing same | |
US3315970A (en) | Flexible gasket for high and low pressure pipe joints | |
US4368894A (en) | Reinforced sealing rings for pipe joints | |
US6488319B2 (en) | Self restrained pressure gasket | |
RU2309316C2 (en) | Distance ring | |
US3637239A (en) | Thrust-resistant pipe joint | |
KR100260498B1 (en) | Improved restraining element for pressure pipe joints | |
US5772253A (en) | Pipe repair or jointing collar | |
EP0352018B1 (en) | A pipe jointing or closing device | |
EP0543103B1 (en) | A sealing device | |
US3078108A (en) | Split coupling | |
RU2045692C1 (en) | Pipe coupling | |
US3834744A (en) | Pipe coupling | |
US3325195A (en) | Coupling and sealing structures | |
US3563574A (en) | Coupling for plastic pipe | |
US3400954A (en) | Pipe coupling | |
US4108446A (en) | Pipe coupling socket assemblies | |
US5709411A (en) | Draft compensating coupling member | |
GB2189000A (en) | A pipe repair or jointing collar | |
WO1986007125A1 (en) | Ring-shaped flat gaskets for propulsive pipes | |
US3363912A (en) | Seal gasket | |
US3291496A (en) | Sealing ring | |
US3151195A (en) | Method and apparatus for making pipe joint sealing structures |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AU BR JP KR US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT NL SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1986903348 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1986903348 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1986903348 Country of ref document: EP |