GB2163227A - Connecting joint for connecting pipe to a threaded attachment - Google Patents
Connecting joint for connecting pipe to a threaded attachment Download PDFInfo
- Publication number
- GB2163227A GB2163227A GB08516982A GB8516982A GB2163227A GB 2163227 A GB2163227 A GB 2163227A GB 08516982 A GB08516982 A GB 08516982A GB 8516982 A GB8516982 A GB 8516982A GB 2163227 A GB2163227 A GB 2163227A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pipe
- sealing body
- ring nut
- external portion
- threaded
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 8
- 239000013536 elastomeric material Substances 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 230000000284 resting effect Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
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
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/06—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends
- F16L19/061—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends a pressure ring being arranged between the clamping ring and the threaded member or the connecting member
-
- 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
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/06—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends
- F16L19/065—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends the wedging action being effected by means of a ring
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Joints With Pressure Members (AREA)
- Joints With Sleeves (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
A joint for connecting piping to a threaded attachment forming e.g. an appliance outlet comprises an annular sealing body 9 which can be locked by means of a ring nut 3; the sealing body 9 has an external portion 14 made of elastomeric material and an internal metal core 10 closely joined together; the external portion extends at one end 16 beyond a flared end 12 of the inner core and exhibits tapered surfaces 6 and 13. At the opposite end 11 the inner core exhibits an internal diameter smaller than that of the pipe 1 and the external portion exhibits in that zone a thicker section 15, capable of resting inside the end edge 8 of the threaded attachment 2. Annular protuberances may assist the seal between body 9 and pipe 1. Sealing is effected by tightening ring nut 3 causing radial deformation of portion 16 against a pipe 1 and axial compression of portion 15 against edge 8 of attachment 2; the integral metal core enables greater speed of installation whilst preventing rotation of portion 16 during tightening. <IMAGE>
Description
SPECIFICATION
Connecting joint for connecting pipe to a threaded attachment
The connection of plain piping to threaded attachment parts on pipes and apparatus such as hydraulic, pneumatic and similar appliances can be effected with many types of connections, which ensure that the joint is leaktight and mechanically hold in position the end of the pipe connected to the said threaded attachment.
A convenient method for achieving such a connection is described in Italian Industrial
Utility Model Application No. 21325 of 28th
March, 1980.
However, this connection requires the presence of several sealing components and clamping parts joined together; it also involves complex installation and exhibits several sealing surfaces.
It is therefore the aim of the present invention to provide an improved connection, which is rapid to install, provides an effective seal and is of moderate cost compared with those joints that are known at present.
According to the invention, this result is obtained by a monobloc joint for the leaktight connection of plain piping to threaded attachments for hydraulic appliances, pipes and the like, and comprises an annular sealing body, which can be locked by means of a ring nut threaded at one end and screwed on the said attachment, radially against the external surface of the pipe and axially against the end edge of the attachment; the sealing body has an external portion made of elastomeric maaerial and an internal metal core closely joined together; the external portion extends at one end beyond the end of the inner core and exhibits a tapered surface converging towards the said end, externally to the said pipe; at the opposite end the inner core exhibits an internal diameter smaller than that of the pipe and the said external portion exhibits in that zone a thicker section, capable of resting inside the said end edge of the threaded attachment; the inner core exhibits, at its top end before the end of the external portion, a flaring out with the tapered end surface facing that of the external portion.
The ring nut may have, at its non-threaded end, an annular portion with a tapered inner surface capable of coupling with the tapered end surface of the external portion of the sealing body.
The annular portion, with a tapered surface, of the ring nut may have, in its smaller diameter zone, an outlet throat capable of allowing the deformation of the sealing body; so that it can be installed, in relation to the diameter of the thread of the said attachment and to the external diameter of the sealing body. This annular portion can be connected to the remainder of the ring nut by means of a screw thread, which is of counter-clockwise design in order to prevent slackening during the tightening of the connection.
The external portion of the sealing body may have, on the part extending beyond the end of the inner metal core, annular protuberances on its internal surface for providing a seal against the surface of the pipe.
The invention will now be described by way of example with reference to the accompanying drawing, which shows one embodiment of a joint according to the invention in longitudinal section.
As shown in the drawing, a joint, according to the invention, enables the end of a pipe 1 to be connected to threaded attachment 2 such as an outlet or an inlet of an appliance, pipe or the like.
The joint consists of a ring nut 3, which can be screwed at one end to the threaded attachment 2 and tightened with the aid of a portion 4 having flat faces. At the opposite end the nut 3 has a ring 5 with a tapered surface 6, whose smaller diameter is located towards the external part of the joint. The ring 5 is connected to the end of ring nut 3 by means of a left-hand screw thread 7, as opposed to the thread of attachment 2.
A sealing body 9 (partly sectioned in the drawing) is inserted, between the tapered surface 6 of the ring 5 and the tapered surface 8 of the attachment 2. The pipe 1 is inserted in the sealing body 9.
The sealing body 9 consists of an inner metal core 10, which has a narrow part 11 at the end facing the attachment 2 whose diameter is smaller than that of pipe 1, and a flared portion 12 at the opposite end. This portion 12 has a tapered surface 13, which has a slope opposite that of surface 6.
Integral with the core 10, the body 9 has an external portion 14, made of elastomeric material, which has a thicker zone 15 in contact with the tapered surface 8 of the attachment 2 and an end part 16 between the surfaces 6 and 13.
On the inner wall 17 of this end part 16 there are several annular protuberances 18.
which assist the seal between the body 9 and the pipe 1.
This seal is effected by tightening the ring nut 3 on the threaded attachment 2, axially compressing the body 9, so as to tighten the zone 15 against the surface 8, thereby obtain
ing a seal between the body 9 and the attachment 2, also causing, as a result of the action of the surfaces 6 and 13 on the part
16 during this tightening process, a deformation of the part 16 radially, thus tightly clamping it against the external surface of pipe 1 and therefore obtaining a seal between the pipe 1 and the body 9.
By making the body 9 in a single piece, with the external portion 14 made of elastom eric material integral with the inner metal core 10 (obtained, for example, when portion 14 is moulded), greater speed of installation is achieved and in addition the end part 16 is stopped from rotating, during the tightening phase, by being clamped against the wall of the pipe 1, thereby avoiding damage to the surface 17 and to the projections 18, which would be detrimental to the seal.
The ring 5 has a suitable positioned outlet throat or portion 19, which allows an even deformation of the end part 16 during tightening of the ring nut 3.
To enable it to be fitted, the ring 5 is separate from the body of the ring nut 3.
Should the threaded attachment have a greater diameter than the external diameter of the sealing body 9, the ring nut 3 and the ring 5 can be made in a single piece.
Claims (6)
1. A joint for the leaktight connection of plain piping to threaded attachments for apparatus such as hydraulic appliances, pipes and the like, comprising an annular sealing body, a ring nut threaded at one end and arranged, in use, to be screwed onto a threaded attachment, to cause the sealing body radially to sealingly engage the external surface of a pipe and axially to sealingly engage an end surface of the attachment, the sealing body having an external portion made of elastomeric material secured to an internal metal core; the external portion extending at one end beyond the end of the inner core and having a tapered surface converging towards the said end externally of the pipe; at the opposite end the inner core having an internal diameter smaller than that of the pipe and the said external portion having in that zone a thicker section in contact with the said end surface of the threaded attachment; the inner core having at the said one end a tapered end surface facing the external portion.
2. A joint according to claim 1, in which the ring nut has, at its non-threaded end, an annular portion with a tapered inner surface for contacting the tapered end surface of the external portion of the sealing body.
3. A joint according to claim 1 or 2, in which the annular portion with a tapered surface of the ring nut has, in the region of its smaller diameter, an outlet throat capable of allowing the deformation of the sealing body.
4. A joint according to claim 1, 2 or 3, in which the said annular portion of the ring nut is connected to the remainder of the ring nut by means of a counter-clockwise screw thread.
5. A joint according to claim 1, 2, 3 or 4, in which the external portion of the sealing body has, on the part extending beyond the end of the inner metal core, annular protuberances on its internal surface for providing a seal against the external surface of the pipe.
6. A joint substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT8422489U IT8422489V0 (en) | 1984-07-05 | 1984-07-05 | CONNECTION FITTING FOR PIPES WITH SINGLE SEAL BODY. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8516982D0 GB8516982D0 (en) | 1985-08-07 |
| GB2163227A true GB2163227A (en) | 1986-02-19 |
| GB2163227B GB2163227B (en) | 1988-01-06 |
Family
ID=11196957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08516982A Expired GB2163227B (en) | 1984-07-05 | 1985-07-04 | Connecting joint for connecting pipe to threaded attachment |
Country Status (10)
| Country | Link |
|---|---|
| AT (1) | AT391538B (en) |
| BE (1) | BE902805A (en) |
| CH (1) | CH664611A5 (en) |
| DE (1) | DE8519590U1 (en) |
| ES (1) | ES287808Y (en) |
| FR (1) | FR2567241B3 (en) |
| GB (1) | GB2163227B (en) |
| IT (1) | IT8422489V0 (en) |
| NL (1) | NL8501919A (en) |
| SE (1) | SE459276B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6659690B1 (en) * | 2000-10-19 | 2003-12-09 | Abb Vetco Gray Inc. | Tapered stress joint configuration |
| US6840550B2 (en) | 2000-11-09 | 2005-01-11 | Marioff Corporation Oy | Pipe joint reducing required tightening force, including a tightening nut with two threaded sections whose pitches differ |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19723344A1 (en) * | 1997-06-04 | 1998-12-10 | Stahl Flex Spezialschlaeuche U | Screw connection or screw component for cable connections |
| DE102021200469A1 (en) | 2021-01-20 | 2022-07-21 | Robert Bosch Gesellschaft mit beschränkter Haftung | Device for storing a gaseous medium |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1528749A (en) * | 1974-12-28 | 1978-10-18 | Mannin Eng Ltd | Pipe couplings |
| NL177516C (en) * | 1978-09-12 | 1985-10-01 | Pidou Bv | SEALING CUFF. |
-
1984
- 1984-07-05 IT IT8422489U patent/IT8422489V0/en unknown
-
1985
- 1985-07-02 CH CH2833/85A patent/CH664611A5/en not_active IP Right Cessation
- 1985-07-03 AT AT0196885A patent/AT391538B/en not_active IP Right Cessation
- 1985-07-03 ES ES1985287808U patent/ES287808Y/en not_active Expired
- 1985-07-03 BE BE0/215289A patent/BE902805A/en not_active IP Right Cessation
- 1985-07-04 GB GB08516982A patent/GB2163227B/en not_active Expired
- 1985-07-04 SE SE8503339A patent/SE459276B/en not_active IP Right Cessation
- 1985-07-04 NL NL8501919A patent/NL8501919A/en not_active Application Discontinuation
- 1985-07-04 FR FR8510252A patent/FR2567241B3/en not_active Expired
- 1985-07-05 DE DE8519590U patent/DE8519590U1/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6659690B1 (en) * | 2000-10-19 | 2003-12-09 | Abb Vetco Gray Inc. | Tapered stress joint configuration |
| US6840550B2 (en) | 2000-11-09 | 2005-01-11 | Marioff Corporation Oy | Pipe joint reducing required tightening force, including a tightening nut with two threaded sections whose pitches differ |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2567241A3 (en) | 1986-01-10 |
| CH664611A5 (en) | 1988-03-15 |
| SE459276B (en) | 1989-06-19 |
| ATA196885A (en) | 1990-04-15 |
| SE8503339D0 (en) | 1985-07-04 |
| GB2163227B (en) | 1988-01-06 |
| DE8519590U1 (en) | 1985-09-05 |
| FR2567241B3 (en) | 1986-06-20 |
| ES287808U (en) | 1986-02-01 |
| ES287808Y (en) | 1986-09-16 |
| NL8501919A (en) | 1986-02-03 |
| BE902805A (en) | 1985-11-04 |
| AT391538B (en) | 1990-10-25 |
| SE8503339L (en) | 1986-01-06 |
| GB8516982D0 (en) | 1985-08-07 |
| IT8422489V0 (en) | 1984-07-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19980704 |