CA1055067A - Pipe coupling component - Google Patents
Pipe coupling componentInfo
- Publication number
- CA1055067A CA1055067A CA268,976A CA268976A CA1055067A CA 1055067 A CA1055067 A CA 1055067A CA 268976 A CA268976 A CA 268976A CA 1055067 A CA1055067 A CA 1055067A
- Authority
- CA
- Canada
- Prior art keywords
- insert
- pipe
- tubular
- extending
- annular grooves
- 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.)
- Expired
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
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
- F16L13/141—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by crimping or rolling from the outside
-
- 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
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/30—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses comprising parts inside the hoses only
-
- 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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
ABSTRACT
An insert for use in a pipe coupling of the type comprising an insert for insertion into the end of a pipe, a member having a tubular portion for reception of an end portion of the pipe containing the insert, and a sleeve for engagement about the tubular portion thereby to trap the pipe between the tubular portion and the insert, and thereby connect the member to the pipe, the insert comp-rising a cylindrical cross-section tubular member the outer surface of which comprises a first portion extending from one end of the insert and having a uniform diameter;
a second, intermediate portion extending from the first portion and having a plurality of relatively wide, arcuate cross-section annular grooves therein; and a third portion extending from the intermediate portion and having a plurality of relatively narrow straight sided and bottomed annular grooves therein, the side of each groove in the third portion facing away from the first and second portions extending substantially perpendicularly of the longitudinal axis of the insert.
An insert for use in a pipe coupling of the type comprising an insert for insertion into the end of a pipe, a member having a tubular portion for reception of an end portion of the pipe containing the insert, and a sleeve for engagement about the tubular portion thereby to trap the pipe between the tubular portion and the insert, and thereby connect the member to the pipe, the insert comp-rising a cylindrical cross-section tubular member the outer surface of which comprises a first portion extending from one end of the insert and having a uniform diameter;
a second, intermediate portion extending from the first portion and having a plurality of relatively wide, arcuate cross-section annular grooves therein; and a third portion extending from the intermediate portion and having a plurality of relatively narrow straight sided and bottomed annular grooves therein, the side of each groove in the third portion facing away from the first and second portions extending substantially perpendicularly of the longitudinal axis of the insert.
Description
~osSO67 This invention relates to a pipe coupling component.
In Canadian Patent Number 875435 (7360) there is described a pipe coupling comprising an insert for inSertiQn into the end of a pipe, a member having a tubular portion for reception of an end portion of the pipe containing the insert, and a sleeve for engagement about the tubular portion thereby to trap the pipe between the tubular portion and the insert, and thereby connect the member to the pipe.
This invention is particularly concerned with an insert for use in such a pipe coupling.
It is known for such inserts to have a grooved outer surface, particularly when for use with a plastics material pipe, thereby to enhance the grip of the insert within the pipe, and thus help to prevent axial forces applied to the pipe pulling the pipe out of the coupling.
One known insert has a plurality of identical frusto-conical ribs extending about its outer periphery with the bases o the ribs extending perpendicularly to the axis of the insert and facing away from the end of the insert, which is to be the leading end when the insert is inserted into a pipe. The ribs are spaced from each other, the spaces between adjacent ribs constituting the above mentioned grooves.
A difficulty which arises with this known insert is that in use under tensile axial load conditions, stress concentrations occur, which can lead to damage and in particular, cracking of the pipe connected to the pipe coupling .
According to this invention an insert for use in a pipe coupling as described above, comprises a cylindrical ~055067 cross-section tubular member the outer surface of which ' comprises a first portion extending from one end of the insert and having a uniform diameter; a second, intermediate portion extending from the first portion and having a plurality of relatively wide, arcuate cross-section annular grooves therein; and a third portion extending from the intermediate portion and having a plurality of relatively narrow straight sided and bottomed annular grooves therein, the side of each groove in the third portion facing away from the first and second portions extending substantially perpendicularly of the longitudinal axis of the insert.
Preferably the side of each groove in the third portion facing the first and second portions extends at substantially 45 to the longitudinal axis of the insert.
It has been found that the use of an insert accord-ing to this invention in a pipe coupling as described above, the insert being inserted into a pipe end with the first portion leading, avoids the above described difficulty of the pipe cracking, and it is thought that this is because the insert permits a small amount of axial movement of a pipe relative to the insert under tensile axial load conditions. This movement allows the stresses occuring under such conditions to be spread over a greater length of the insert, thus avoiding stress concentrations as can occur with known inserts~
The form of the grooves in the third portion of the ins,ert ensures satisfactory sealing of the connection between a pipe and a pipe coupling utilising an insert according to this invention.
Preferably the outer surface of the insert has a 1055~)6~7 fourth portion extending from the third portion to the other end of the insert, the fourth portion having a uniform diameter throughout its length there being an outwardly directed flange at the other end o~ the insert, which flange will serve in use to locate the insert in a complete pipe coupling.
An insert according to this invention will now be described by way of example with reference to the drawing in which:-Figure 1 is a side view of the insert;
Figure 2 is an end view of the insert; and Figure 3 shows a detail from within the ring III
in Figure 1.
The insert 1 is a cylindrical cross-section, tubular member formed of steel, to have a constant diameter bore 2.
The outer surface of the insert 1 has a first portiGn 3 extending from one end 4 of the insert and having a uniform diameter. The end 4 of the insert is rounded in order to facilitate insertion of the insert into a pipe end.
A second, intermediate portion 5 extends from the first portion 3, and has three relatively wide, arcuate cross-section annular grooves 6 therein.
A third portion 7 extends from the intermediate portion 5 and has nine relatively narrow straight-sided and bottomed annular grooves 8 therein. The side 9 (Figure 3) of each groove 8 facing away from the first and second portions 3 and 5 extends substantially perpendicularly of the lonq-itudinal axis of the insert 1, while the other side 10 (Figure 3) of each groove 8 facing the first and second portions 3 and 5 extends at substantially 45 to the longitudinal axis of the insert 1. lOS~67 A fourth portion 11 extends from the third portion 7 to the other end 12 of the insert 1, the fourth portion 11 having a uniform diameter.
There is an outwardly directed flange 13 at the other end 12 of the insert 1, which flange 13 will serve in use to locate the insert 1 in the housing of a complete pipe coupling assembly.
10 .
In Canadian Patent Number 875435 (7360) there is described a pipe coupling comprising an insert for inSertiQn into the end of a pipe, a member having a tubular portion for reception of an end portion of the pipe containing the insert, and a sleeve for engagement about the tubular portion thereby to trap the pipe between the tubular portion and the insert, and thereby connect the member to the pipe.
This invention is particularly concerned with an insert for use in such a pipe coupling.
It is known for such inserts to have a grooved outer surface, particularly when for use with a plastics material pipe, thereby to enhance the grip of the insert within the pipe, and thus help to prevent axial forces applied to the pipe pulling the pipe out of the coupling.
One known insert has a plurality of identical frusto-conical ribs extending about its outer periphery with the bases o the ribs extending perpendicularly to the axis of the insert and facing away from the end of the insert, which is to be the leading end when the insert is inserted into a pipe. The ribs are spaced from each other, the spaces between adjacent ribs constituting the above mentioned grooves.
A difficulty which arises with this known insert is that in use under tensile axial load conditions, stress concentrations occur, which can lead to damage and in particular, cracking of the pipe connected to the pipe coupling .
According to this invention an insert for use in a pipe coupling as described above, comprises a cylindrical ~055067 cross-section tubular member the outer surface of which ' comprises a first portion extending from one end of the insert and having a uniform diameter; a second, intermediate portion extending from the first portion and having a plurality of relatively wide, arcuate cross-section annular grooves therein; and a third portion extending from the intermediate portion and having a plurality of relatively narrow straight sided and bottomed annular grooves therein, the side of each groove in the third portion facing away from the first and second portions extending substantially perpendicularly of the longitudinal axis of the insert.
Preferably the side of each groove in the third portion facing the first and second portions extends at substantially 45 to the longitudinal axis of the insert.
It has been found that the use of an insert accord-ing to this invention in a pipe coupling as described above, the insert being inserted into a pipe end with the first portion leading, avoids the above described difficulty of the pipe cracking, and it is thought that this is because the insert permits a small amount of axial movement of a pipe relative to the insert under tensile axial load conditions. This movement allows the stresses occuring under such conditions to be spread over a greater length of the insert, thus avoiding stress concentrations as can occur with known inserts~
The form of the grooves in the third portion of the ins,ert ensures satisfactory sealing of the connection between a pipe and a pipe coupling utilising an insert according to this invention.
Preferably the outer surface of the insert has a 1055~)6~7 fourth portion extending from the third portion to the other end of the insert, the fourth portion having a uniform diameter throughout its length there being an outwardly directed flange at the other end o~ the insert, which flange will serve in use to locate the insert in a complete pipe coupling.
An insert according to this invention will now be described by way of example with reference to the drawing in which:-Figure 1 is a side view of the insert;
Figure 2 is an end view of the insert; and Figure 3 shows a detail from within the ring III
in Figure 1.
The insert 1 is a cylindrical cross-section, tubular member formed of steel, to have a constant diameter bore 2.
The outer surface of the insert 1 has a first portiGn 3 extending from one end 4 of the insert and having a uniform diameter. The end 4 of the insert is rounded in order to facilitate insertion of the insert into a pipe end.
A second, intermediate portion 5 extends from the first portion 3, and has three relatively wide, arcuate cross-section annular grooves 6 therein.
A third portion 7 extends from the intermediate portion 5 and has nine relatively narrow straight-sided and bottomed annular grooves 8 therein. The side 9 (Figure 3) of each groove 8 facing away from the first and second portions 3 and 5 extends substantially perpendicularly of the lonq-itudinal axis of the insert 1, while the other side 10 (Figure 3) of each groove 8 facing the first and second portions 3 and 5 extends at substantially 45 to the longitudinal axis of the insert 1. lOS~67 A fourth portion 11 extends from the third portion 7 to the other end 12 of the insert 1, the fourth portion 11 having a uniform diameter.
There is an outwardly directed flange 13 at the other end 12 of the insert 1, which flange 13 will serve in use to locate the insert 1 in the housing of a complete pipe coupling assembly.
10 .
Claims (3)
1. An insert for use in a pipe coupling of the type comprising an insert for insertion into the end of a pipe, a member having a tubular portion for reception of an end portion of the pipe containing the insert, and a sleeve for engagement about the tubular portion thereby to trap the pipe between the tubular portion and the insert, and thereby connect the member of the pipe, the insert comprising a cylindrical cross-section tubular member the outer surface of which comprises a first portion extending from one end of the insert and having a uniform diameter; a second, intermediate portion extending from the first portion and having a plurality of relatively wide, arcuate cross-section annular grooves therein; and a third portion extending from the intermediate portion and having a plurality of relatively narrow straight sided and bottomed annular grooves therein, the side of each groove in the third portion facing away from the first and second portions extending substantially perpendicularly of the longitudinal axis of the insert.
2. An insert as claimed in Claim 1, in which the side of each groove in the third portion facing the first and second portions extends at substantially 45° to the longitudinal axis of the insert.
3. An insert as claimed in Claim 1 or Claim 2, in which the outer surface of the insert has a fourth portion extending from the third portion to the other end of the insert, the fourth portion having a uniform diameter throughout its lenght, there being an outwardly directed flange at the other end of the insert.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1847/76A GB1523961A (en) | 1976-01-17 | 1976-01-17 | Pipe coupling insert |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1055067A true CA1055067A (en) | 1979-05-22 |
Family
ID=9729054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA268,976A Expired CA1055067A (en) | 1976-01-17 | 1976-12-30 | Pipe coupling component |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS5288814A (en) |
| AR (1) | AR209844A1 (en) |
| AU (1) | AU2069376A (en) |
| BR (1) | BR7700235A (en) |
| CA (1) | CA1055067A (en) |
| DE (1) | DE2700199A1 (en) |
| ES (1) | ES454770A1 (en) |
| FI (1) | FI763746A (en) |
| FR (1) | FR2338447A1 (en) |
| GB (1) | GB1523961A (en) |
| IT (1) | IT1065484B (en) |
| NL (1) | NL7614529A (en) |
| SE (1) | SE7700406L (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1596112A (en) * | 1978-03-31 | 1981-08-19 | British Gas Corp | Pipe coupling and a method for assembling the coupling |
| DE3517163A1 (en) * | 1985-05-11 | 1986-11-13 | Aeroquip GmbH, 7570 Baden-Baden | METHOD FOR PRODUCING A HOSE NIPPLE FOR HYDRAULICALLY LOADED PRESS OR SCREW FITTINGS |
| DE9402909U1 (en) * | 1994-02-22 | 1994-08-04 | Thermconcept Produkte Fuer Hei | Two-part clamp connector |
| US6050608A (en) * | 1996-04-08 | 2000-04-18 | Mitsubishi Kagaku Sanshi Corporation | Fitting for a plastic pipe |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1167779A (en) * | 1966-10-18 | 1969-10-22 | Amp Inc | A pipe coupling and method of application. |
| US3529853A (en) * | 1969-05-20 | 1970-09-22 | Willard G Triest | Cable hose coupling |
| GB1402291A (en) * | 1972-06-27 | 1975-08-06 | Btr Industries Ltd | Hose end fittings |
| DE2305466A1 (en) * | 1973-02-03 | 1974-08-22 | Hoerster Fa E & F | TENSION ELEMENT FOR HOSES |
-
1976
- 1976-01-17 GB GB1847/76A patent/GB1523961A/en not_active Expired
- 1976-12-17 AU AU20693/76A patent/AU2069376A/en not_active Expired
- 1976-12-21 IT IT30715/76A patent/IT1065484B/en active
- 1976-12-27 JP JP15663476A patent/JPS5288814A/en active Pending
- 1976-12-29 FR FR7639446A patent/FR2338447A1/en active Pending
- 1976-12-29 NL NL7614529A patent/NL7614529A/en not_active Application Discontinuation
- 1976-12-30 CA CA268,976A patent/CA1055067A/en not_active Expired
- 1976-12-30 FI FI763746A patent/FI763746A/fi not_active Application Discontinuation
-
1977
- 1977-01-03 ES ES454770A patent/ES454770A1/en not_active Expired
- 1977-01-04 DE DE19772700199 patent/DE2700199A1/en active Pending
- 1977-01-07 AR AR266128A patent/AR209844A1/en active
- 1977-01-13 BR BR7700235A patent/BR7700235A/en unknown
- 1977-01-14 SE SE7700406A patent/SE7700406L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SE7700406L (en) | 1977-07-18 |
| DE2700199A1 (en) | 1977-07-28 |
| FR2338447A1 (en) | 1977-08-12 |
| AU2069376A (en) | 1978-06-22 |
| AR209844A1 (en) | 1977-05-31 |
| IT1065484B (en) | 1985-02-25 |
| FI763746A (en) | 1977-07-18 |
| BR7700235A (en) | 1977-09-20 |
| JPS5288814A (en) | 1977-07-25 |
| ES454770A1 (en) | 1978-01-01 |
| GB1523961A (en) | 1978-09-06 |
| NL7614529A (en) | 1977-07-19 |
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