WO2006087635A2 - Pipe with socketed end for joints - Google Patents
Pipe with socketed end for joints Download PDFInfo
- Publication number
- WO2006087635A2 WO2006087635A2 PCT/IB2006/000495 IB2006000495W WO2006087635A2 WO 2006087635 A2 WO2006087635 A2 WO 2006087635A2 IB 2006000495 W IB2006000495 W IB 2006000495W WO 2006087635 A2 WO2006087635 A2 WO 2006087635A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pipe
- fact
- ring
- socketed
- housing
- 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
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/092—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector
-
- 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
- F16L21/08—Joints with sleeve or socket with additional locking means
Definitions
- the utility model described in this application has a polyethylene pipe for making piping for distributing and transporting pressurised fluids. More particularly, this pipe model is fitted with a socketed end suitable for connecting to the end of another pipe of the same diameter, in order to fit the piping in line.
- a first method that uses this technique is performed by placing a heated metal plate between the two ends of the pipes to be connected, which is removed after melting the ends of the pipes in contact with it, so that these ends come together and are pressed, thus permitting cohesion.
- a second joining method of the ends of the pipes is based on projection welding the ends by using a circular joint containing an electrical resistance inside it.
- a suitable current By applying a suitable current, significant thermal energy is produced by the well-known Joule effect. This heats up the turn and thus welds the contact surfaces between the joint and the ends of the pipes to be joined.
- the heating procedure, pressurisation and cooling of the pipe ends also requires long processing times and the use of suitable equipment.
- a further problem of butt welding systems consists of the excessive time to make the connection, whereas from a technological point of view, a difficulty of
- This model aims at providing a pipe which is pre-fitted with a joint and thus permits a saving on the cost of purchasing the joint or alternatively of the butt welding.
- Another important aim is that of providing a pipe with which it is possible to obtain a rapid positioning and alignment of the elements to be joined making the presence of specialised operators superfluous.
- a final aim is that of guaranteeing greater rigidity and bending resistance at the point where the pipes are joined.
- fig. 1 An assonometric view of a joint obtained by means of the pipe with a socketed end; fig. 2 The same view as figure 1 with the socketed end of the pipe in a
- fig. 4 An exploded display of the pipe with a socketed end.
- fig. 5 An assonometric view of a joint obtained with a socket containing a single internal groove.
- the pipe has one swollen end 1 obtained with a socketing machine.
- This is a machine that creates a shape in the pipe by means of thermomechanical action performed by a mechanical stopper which creates a swelling of the head by penetrating the end of the heated pipe.
- the internal surface of the socket 1 has two grooves, the first groove 5 will house a trapezoid section toothed ring 2 which surrounds and squeezes the pipe T to be connected according to the longitudinal thrusts which tend to release the same pipe T.
- the second groove 6 on the other hand has the job of housing a seal 3 which increases the hydraulic seal between the connected pipes.
- Grooves 5 and 6 can be of any shape and geometry.
- the external surface of the socket has a groove 7 in which a ring 4, which has the job of contrasting the radial forces exerted by ring 2, is
- grooves 5 and 6 on the internal surface of the socket are replaced by a single groove 8 which is used to contain simultaneously both the toothed ring 2 and the seal 3
Abstract
The Utility Model under discussion consists of a pipe which is pre-fitted with a socked end (1), serving the purpose of guaranteeing a perfect alignment of the joint with respect to the pipe (T) to which it is applied. This model is built performing adequately the pipe at one of its ends, along with creating suitable internal shape for the gaskets (3), necessary for the connection with the pipe to be jointed.
Description
"PIPE WITH SOCKETED END FOR JOINTS" DESCRIPTION
The utility model described in this application has a polyethylene pipe for making piping for distributing and transporting pressurised fluids. More particularly, this pipe model is fitted with a socketed end suitable for connecting to the end of another pipe of the same diameter, in order to fit the piping in line.
As is known, the manufacture of a polyethylene pipeline for transporting liquid requires the use and the coupling of a large number of pipes, particularly when their diameter is such as to not permit their transport in rolls.
There are numerous systems for coupling the pipes, amongst which a very widespread one consists of approaching and preparing the ends of the piping to be connected by welding with a butt joint. A first method that uses this technique is performed by placing a heated metal plate between the two ends of the pipes to be connected, which is removed after melting the ends of the pipes in contact with it, so that these ends come together and are pressed, thus permitting cohesion.
A second joining method of the ends of the pipes is based on projection welding the ends by using a circular joint containing an electrical resistance inside it. By applying a suitable current, significant thermal energy is produced by the well- known Joule effect. This heats up the turn and thus welds the contact surfaces between the joint and the ends of the pipes to be joined.
After a certain time, necessary to melt and completely join the contact surfaces, the energy supply is interrupted and sufficient cooling time is given,. After this the j oint is completed.
The greater distribution of projection welding with respect to the traditional welding system is justified by a series of advantages amongst which a larger surface welded. This guarantees a longer lasting joint and an increase of the mechanical performance and the possibility of joining pipes with differing thicknesses or belonging to different classes of pressure.
The pipes joined by means of projection welding also guarantee an excellent seal which is necessary to avoid leakage during the transit of fluids and to allow cables to be fitted when they are laid using compressed air. Finally, another well-known mechanical system for on-line joining of polythene pipes consists of using compression joints, these are based on clamping the pipe by means of a toothed ring which surrounds and clamps the pipe after a clamp ring is screwed.
All the known systems which either use a butt weld of the pipes to be joined or which foresee a mechanical type of connection by using connections, present a series of problems.
Indeed, the former require long and at times laborious preliminary operations which are necessary to ensure a good weld.
Moreover, a problem of this system is represented by the fact that the presence of an expert operator with an appropriate licence is necessary, as is the presence of
ideal weather conditions, without which a good weld cannot be obtained.
The heating procedure, pressurisation and cooling of the pipe ends also requires long processing times and the use of suitable equipment.
A further problem of butt welding systems consists of the excessive time to make the connection, whereas from a technological point of view, a difficulty of
creating such a system is connected to the need for the perfect alignment of the
joint to be welded with respect to the pipe to which it is applied.
As regards the technique which foresees joining the pipes by means of projection welding, it has the problem of being particularly difficult with respect to traditional methods. Even the second ones, that is those which foresee the use of compression joints have a series of difficulties amongst which the main one is undoubtedly their cost which has a significant effect on the price of completing the whole pipeline.
This model aims at providing a pipe which is pre-fitted with a joint and thus permits a saving on the cost of purchasing the joint or alternatively of the butt welding.
Another important aim is that of providing a pipe with which it is possible to obtain a rapid positioning and alignment of the elements to be joined making the presence of specialised operators superfluous.
A final aim is that of guaranteeing greater rigidity and bending resistance at the point where the pipes are joined.
These aims are achieved with the model which is described below in a preferable implementation but not limited by further possible developments within the
model, with the aid of the two attached tables of drawings which illustrate the following figures: fig. 1 An assonometric view of a joint obtained by means of the pipe with a socketed end; fig. 2 The same view as figure 1 with the socketed end of the pipe in a
longitudinal section; fig. 3 An assonometric view of the pipe with a socketed end, longitudinal section,
in the version with a reinforcing ring;
fig. 4 An exploded display of the pipe with a socketed end. fig. 5 An assonometric view of a joint obtained with a socket containing a single internal groove.
As illustrated in the attached tables, the pipe has one swollen end 1 obtained with a socketing machine. This is a machine that creates a shape in the pipe by means of thermomechanical action performed by a mechanical stopper which creates a swelling of the head by penetrating the end of the heated pipe.
The internal surface of the socket 1 has two grooves, the first groove 5 will house a trapezoid section toothed ring 2 which surrounds and squeezes the pipe T to be connected according to the longitudinal thrusts which tend to release the same pipe T.
The second groove 6 on the other hand has the job of housing a seal 3 which increases the hydraulic seal between the connected pipes.
Grooves 5 and 6 can be of any shape and geometry. In a further version, the external surface of the socket has a groove 7 in which a ring 4, which has the job of contrasting the radial forces exerted by ring 2, is
housed.
In another version grooves 5 and 6 on the internal surface of the socket are replaced by a single groove 8 which is used to contain simultaneously both the toothed ring 2 and the seal 3
Claims
1. "Pipe with socketed end for joints" characterised by a socket 1 whose internal surface has two grooves (5) and (6) of which the first, with a trapezoid section, is capable of housing a toothed ring (2) and the second is for housing a hydraulic sealing ring (3).
2. Socketed pipe as described in claim 1, characterised by the fact that the grooves (5) and (6) can be of any shape and size suitable for housing respectively a toothed ring (2) and a seal (3).
3. Socketed pipe as described in claim 2, characterised by the fact that the grooves (5) and (6) can be more than one.
4. Pipe described in the previous claims, characterised by the fact that the toothed ring (2) is a truncated cone shape and is also fitted with a series of teeth to clamp the pipe T.
5. Pipe described in the previous claims, characterised by a groove (7) in the external surface of the socket near its edge for housing a ring (4).
6. Pipe described in the previous claims, characterised by the fact that the ring (4) may be open or closed.
7. Pipe with socketed end characterised by the fact that on the internal surface of the pipe head (1) there is a groove (8) for housing simultaneously a toothed ring (2) and a hydraulic seal (3).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06710512A EP1872045A2 (en) | 2005-02-21 | 2006-02-20 | Pipe with socketed end for joints |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITBA2005U000005 | 2005-02-21 | ||
ITBA20050005 ITBA20050005U1 (en) | 2005-02-21 | 2005-02-21 | TUBE WITH A CALLED EXTREMITY FOR JUNCTIONS |
ITBA20050014 ITBA20050014U1 (en) | 2005-06-22 | 2005-06-22 | JOINT TUBE |
ITBA2005U000014 | 2005-06-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2006087635A2 true WO2006087635A2 (en) | 2006-08-24 |
WO2006087635A3 WO2006087635A3 (en) | 2006-10-05 |
Family
ID=36698664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2006/000495 WO2006087635A2 (en) | 2005-02-21 | 2006-02-20 | Pipe with socketed end for joints |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1872045A2 (en) |
WO (1) | WO2006087635A2 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3815940A (en) * | 1971-07-22 | 1974-06-11 | Mueller Co | Joint for smooth end or flareless pipe |
US4018462A (en) * | 1975-10-31 | 1977-04-19 | Hitachi Metals, Ltd. | Pipe fitting |
US5722702A (en) * | 1996-04-12 | 1998-03-03 | Arnco Corporation | Plastic pipe compression coupler |
DE19858514C2 (en) * | 1998-12-18 | 2001-03-22 | Ludwig Frischhut Gmbh & Co Kg | Socket connection with a push lock |
US6976712B2 (en) * | 2002-04-17 | 2005-12-20 | Micromold Products Inc. | Corrosion-resistant coupling means and methods for using same |
-
2006
- 2006-02-20 WO PCT/IB2006/000495 patent/WO2006087635A2/en active Application Filing
- 2006-02-20 EP EP06710512A patent/EP1872045A2/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
None |
Also Published As
Publication number | Publication date |
---|---|
EP1872045A2 (en) | 2008-01-02 |
WO2006087635A3 (en) | 2006-10-05 |
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