GB2180310A - Pipe socket assembly - Google Patents

Pipe socket assembly Download PDF

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Publication number
GB2180310A
GB2180310A GB08522730A GB8522730A GB2180310A GB 2180310 A GB2180310 A GB 2180310A GB 08522730 A GB08522730 A GB 08522730A GB 8522730 A GB8522730 A GB 8522730A GB 2180310 A GB2180310 A GB 2180310A
Authority
GB
United Kingdom
Prior art keywords
spigot
socket assembly
groove
pipe
socket
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
Application number
GB08522730A
Other versions
GB2180310B (en
GB8522730D0 (en
Inventor
Dr Frederick Thomas Murphy
Nick Skovgaard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JYDSK ALUMINIUM IND AS
Wavin BV
Original Assignee
JYDSK ALUMINIUM IND AS
Wavin BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JYDSK ALUMINIUM IND AS, Wavin BV filed Critical JYDSK ALUMINIUM IND AS
Priority to GB8522730A priority Critical patent/GB2180310B/en
Publication of GB8522730D0 publication Critical patent/GB8522730D0/en
Publication of GB2180310A publication Critical patent/GB2180310A/en
Application granted granted Critical
Publication of GB2180310B publication Critical patent/GB2180310B/en
Expired legal-status Critical Current

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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
    • F16L17/00—Joints with packing adapted to sealing by fluid pressure
    • F16L17/02—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket
    • F16L17/03—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket having annular axial lips
    • F16L17/035—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket having annular axial lips the sealing rings having two lips parallel to each other
    • 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
    • F16L37/0925—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 with rings which bite into the wall of the pipe

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Joints With Sleeves (AREA)

Abstract

A pipe socket assembly 1 for forming a tensile resistant pipe connection with a plastics spigot 2, comprises a socket 5 having a gripper ring 6 disposed in a first radially inwardly opening annular groove 7 for gripping engagement with the external surface of the spigot 2 and a sealing ring 8 located in a second radially inwardly opening annular groove 9 axially spaced from the first groove, which is formed with two circumferential lip portions 10, 11 having a substantially V-shaped cross-section when undeformed. One lip portion 10 is retained in said second groove 9 by a retaining ring 12 disposed in engagement therewith and between both lip portions and the other lip portion 11 is arranged for sealingly engaging the external surface of the spigot 2. <IMAGE>

Description

SPECIFICATION Pipe socket assembly This invention relates to a pipe socket assembly for forming a tensile resistant pipe connection with a spigot.
The invention is particularly, but not exclusively, applicable in polyethylene pipe systems used for potable water distribution where the usual fusion weld is either not possible or undesirable.
The invention includes a pipe socket assembly for forming a tensile resistant pipe connection with a spigot, which socket assembly comprises a socket having a gripper ring disposed in a first radially inwardly opening annular groove for gripping engagement with the external surface of the spigot and a sealing ring located in a second radially inwardly opening annular groove axially spaced from said first groove, said sealing ring being formed with two circumferential lip portions having a substantially V-shaped cross-section when undeformed, one lip portion being retained in said second groove by a retaining ring disposed in engagement therewith and between said lip portions and the other lip portion being arranged to sealingly engage the external surface of the spigot.
In an assembly as defined above advantageously the lengths of the lip portions of said sealing ring are such that both lip portions extend axially inwardly of said retaining ring in the socket, and the dimensions of said lip portions are such that there is more volume of lip material axially inwardly of said retaining ring than there is room for in the space confined by the adjacent part of the bottom of the second groove, the external surface of the spigot to be inserted into the socket, the axially inner sidewall of the second groove and the retaining ring, so that when the spigot is inserted in the socket the lip material is in a state of compression and deformation and substantially fills up said space.
The invention also includes a pipe socket assembly for forming a tensile resistant pipe connection with a spigot, which socket assembly comprises a socket formed of cast metal and having a gripper ring disposed in a first radially inwardly opening annular groove for gripping engagement with the external surface of the spigot and a sealing ring located in a second radially inwardly opening annular groove axially spaced from said first groove.
Advantageously the socket is formed of a cast aluminium alloy and is preferably coated with a nylon material.
In the embodiment of the invention described hereinafter the gripper ring is split axially and furthermore the first groove of the socket has a frusto-conical surface which is cooperable with a frusto-conical external surface of the gripper ring to allow radial expansion of the gripper ring on axial movement thereof in said first groove away from the outer end of the socket.
In the embodiment the first groove of the socket is axially inwardly of the second groove thereof.
The socket assembly may be provided on the end of a pipe length but it is envisaged that more commonly it would be provided on one end of a pipe fitting, for example a T-joint, a bend or a coupler.
The invention also includes a tensile resistant pipe connection comprising a socket assembly as defined above and a spigot inserted therein, the gripper ring being in gripping engagement with the external surface of the spigot and the sealing ring sealingly engaging the external surface of the spigot.
If the spigot is formed of a plastics material, for example when the spigot is an end portion of a polyethylene pipe, it is preferably provided internally with a reinforcing bush to reinforce the spigot against compression by said gripper ring.
In order that the invention may be well understood, the embodiment thereof referred to above, will now be described by way of example only, reference being made to the accompanying drawing in which the single figure is a semi-axial cross-section of a socket assembly and spigot.
The illustrated socket assembly 1 is intended for use in a potable water distribution system for connection to a spigot end 2 of a polyethylene pipe in a tensile resistant manner.
The socket assembly 1 is provided on one end of a cast metal coupler 3, the other end of which is provided with a flange 4 by which the coupler 3 can be connected in a tensile and torque resistant manner to the flange of a further metal component of the distribution system, such as a cast metal Junction, a bend, or a valve. Alternatively the socket assembly may be provided on the end of such a component.
The coupler 3 is cast in high strength aluminium alloy and is thus tensile and torque resistant and also resistant to impacts which it may be subjected to in use if it is left exposed for access.
Whilst the aluminium alloy would be corrosion resistant to a certain degree it is preferred to coat the aluminium coupler with a plastics coating and in the embodiment the coating is a nylon for example Rilsan. If the coupler were cast in another metal, a plastics coating is also envisaged to prevent corrosion.
The use of a high strength aluminium alloy however is preferred since not only does the resulting coupler have the required mechanical properties but also it is light in weight. Furthermore, aluminium alloy is particularly adapted to be readily cast.
The socket assembly 1 comprises a socket 5 having a gripper ring 6 disposed in a first radially inwardly opening annular groove 7 for gripping engagement with the external surface of the spigot 2 and a sealing ring 8 located in a second radially inwardly opening groove 9 axially spaced from the groove 7. In the illustrated socket assembly, the groove 7 is axially inwardly of the groove 9.
The sealing ring 8 is preferably formed of rubber and, in the embodiment shown, is formed with two circumferential lip portions 10 and 11 having a substantially V-shaped cross-section when undeformed, as illustrated.
The radially outer lip portion 10 is retained in the groove 9 by a retaining ring 12 disposed in engagement with the lip portion 10 in a groove defined thereby and is located between that lip portion and the lip portion 11.
The retaining ring 12 is adapted to press the lip portion 10 against the bottom of the groove 9 to prevent it being forced out of the groove 9 when the spigot is inserted into the socket assembly and engages and deforms the radially inner lip portion 11 which is arranged to sealingly engage the external surface of the spigot.
The lengths of the lip portions 10, 11 of the sealing ring 8 are such that both lip portions extend axially inwardly of said retaining ring 12 in the socket, and the dimensions of said lip portions are such that there is more volume of lip material axially inwardly of said retaining ring than there is room for in the space confined by the adjacent part of the bottom of the groove 9, the external surface of the spigot 2 to be inserted into the socket, the axially inner sidewall of the groove 9 and the retaining ring 12, so that when the spigot is inserted in the socket the lip material is in a state of compression and deformation and substantially fills up said space.
Further examples of possible arrangements of a sealing ring retained in a groove by a retaining ring are given in GB-A-2016630 to which reference is directed.
The gripper ring 6 is preferably formed of metal, for example stainless steel, and comprises a plurality of circumferentially extending axially spaced teeth 13 which are inclined axially inwardly in the socket assembly and arranged to dig into and thereby grip the external surface of the spigot 2 when the latter is inserted in the socket assembly. The gripper ring 6 is axially split to enable it to contract and expand radially, and the groove 7 has a frusto-conical base surface which is cooperable with a frusto-conical external surf#ace 14 of the gripper ring 6 to allow radial expansion of the ring 6 on axial movement thereof in the groove 7 away from the outer end of the socket. It will be appreciated that when the spigot is inserted into the socket assembly, the gripper ring will ride over the chamfered end 15 thereof onto the external surface of the spigot.A radial face 16 of the groove 7 limits the axial movement of the ring inwardly as it moves along the groove 7 with its teeth engaged in the external surface of the spigot.
Thereafter relative axial movement of the spigot and socket assembly due to tensile loads thereon is resisted by engagement of the cooperable frusto-conical surfaces of the groove 7 and gripper ring 6.
As will be appreciated from the foregoing the polyethylene spigot will be subjected to radial compressive loads by the gripper ring 6 and also to a lesser extent by the sealing ring 8. In order to reinforce the spigot against such compressive loads the spigot is provided internally with a reinforcing bush 17. The bush 17 is provided with a radial end flange 18 to limit its insertion into the spigot and is split obliquely along its length to allow its outer surface to confirm with the inner surface of the spigot, the diameter of which may vary due to manufacturing tolerances.

Claims (16)

1. A pipe socket assembly for forming a tensile resistant pipe connection with a spigot, which socket assembly comprises a socket having a gripper ring disposed in a first radially inwardly opening annular groove for gripping engagement with the external surface of the spigot and a sealing ring located in a second radially inwardly opening annular groove axially spaced from said first groove, said sealing ring being formed with two circumferential lip portions having a substantially Vshaped cross-section when undeformed, one lip portion being retained in said second groove by a retaining ring disposed in engagement therewith and between said lip portions and the other lip portion being arranged to sealingly engage the external surface of the spigot.
2. A pipe socket assembly as claimed in claim 1, wherein the lengths of the lip portions of said sealing ring are such that both lip portions extend axially inwardly of said retaining ring in the socket, and the dimensions of said lip portions are such that there is more volume of lip material axially inwardly of said retaining ring than there is room for in the space confined by the adjacent part of the bottom of the second groove, the external surface of the spigot to be inserted into the socket, the axially inner sidewall of the second groove and the retaining ring, so that when the spigot is inserted in the socket the lip material is in a state of compression and deformation and substantially fills up said space.
3. A pipe socket assembly as claimed in claim 1 or 2, wherein said socket is formed of cast metal.
4. A pipe socket assembly for forming a tensile resistant pipe connection with a spigot, which socket assembly comprises a socket formed of cast metal and having a gripper ring disposed in a first radially inwardly opening annular groove for gripping engagement with the external surface of the spigot and a sealing ring located in a second radially inwardly opening annular groove axially spaced from said first groove.
5. A pipe socket assembly as claimed in claim 3 or 4, wherein the socket is formed .of cast aluminium alloy.
6. A pipe socket assembly as claimed in claim 3, 4 or 5, wherein said cast metal socket is provided with a plastics coating.
7. A pipe socket assembly as claimed in claim 5, wherein said cast aluminium material is coated with a nylon material.
8. A pipe socket assembly as claimed in any one of the preceding claims, wherein said gripper ring is split axially.
9. A pipe socket assembly as claimed in claim 3, wherein said first groove has a frusto-conical surface which is cooperable with a frusto-conical external surface of the gripper ring to allow radial expansion of the gripper ring on axial movement thereof in said firstgroove away from the outer end of the socket.
10. A pipe socket assembly as claimed in any one of the preceding claims, wherein the first groove is axially inwardly of the second groove.
11. A pipe socket assembly as claimed in any one of the preceding claims, wherein said socket assembly is provided on one end of a pipe fitting.
12. A tensile resistant pipe connection comprising a socket assembly as claimed in any one of the preceding claims and a spigot inserted therein, the gripper ring being in gripper engagement with the external surface of the spigot and the sealing ring sealingly engaging the external surface of the spigot.
13. A pipe connection as claimed in claim 12, wherein the spigot is formed of a plastics material and is provided internally with a reinforcing bush to reinforce the spigot against compression by said gripper ring.
14. A pipe connection as claimed in claim 13, wherein the spigot is an end portion of a polyethylene pipe.
15. A pipe socket assembly for forming a tensile resistant pipe joint with a spigot, substantially as hereinbefore described with reference to the accompanying drawing.
16. A tensile resistant pipe connection substantially as hereinbefore described with reference to the accompanying drawing.
GB8522730A 1985-09-13 1985-09-13 Pipe socket assembly Expired GB2180310B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8522730A GB2180310B (en) 1985-09-13 1985-09-13 Pipe socket assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8522730A GB2180310B (en) 1985-09-13 1985-09-13 Pipe socket assembly

Publications (3)

Publication Number Publication Date
GB8522730D0 GB8522730D0 (en) 1985-10-16
GB2180310A true GB2180310A (en) 1987-03-25
GB2180310B GB2180310B (en) 1989-08-23

Family

ID=10585148

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8522730A Expired GB2180310B (en) 1985-09-13 1985-09-13 Pipe socket assembly

Country Status (1)

Country Link
GB (1) GB2180310B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997006380A1 (en) * 1995-08-05 1997-02-20 Uponor Limited Pipe joint
WO2005103550A1 (en) * 2004-04-23 2005-11-03 Henn Gmbh & Co. Kg Plug-in connection comprising a moulded sealing ring
CN108361457A (en) * 2018-02-28 2018-08-03 邓华明 Automatic-sealed quick coupling
EP4028681A4 (en) * 2019-09-12 2023-09-20 S & B Technical Products, Inc. Lightweight sealing gasket for low pressure and non-pressure applications

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB940833A (en) * 1960-10-06 1963-11-06 Polva Nederland Bv Improvements in or relating to releasable tube connections
GB1283489A (en) * 1970-07-16 1972-07-26 Muecher Hermann Improvements in and relating to sealing of pipe joints
GB2016630A (en) * 1978-02-03 1979-09-26 Wavin Bv Sealing of spigot and socket pipe joints
GB1555640A (en) * 1978-05-11 1979-11-14 C E & J P Britton Ltd Tube coupling
GB1569400A (en) * 1976-03-31 1980-06-11 Bristol Prod Coupler for tube
US4288113A (en) * 1979-07-06 1981-09-08 Parker-Hannifin Corporation Quick connector coupling for semi-rigid hose
EP0064315A2 (en) * 1981-05-01 1982-11-10 Wavin B.V. A tensile resistant pipe connection and a socket provided with an end cap
EP0073083A1 (en) * 1981-08-20 1983-03-02 Wavin B.V. Sealing ring
GB2125500A (en) * 1982-08-10 1984-03-07 Paragon Plastics Limited Push-fit plumbing fittings
US4463974A (en) * 1980-10-27 1984-08-07 Maremont Corporation Coupling with improved tube-gripping member

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB940833A (en) * 1960-10-06 1963-11-06 Polva Nederland Bv Improvements in or relating to releasable tube connections
GB1283489A (en) * 1970-07-16 1972-07-26 Muecher Hermann Improvements in and relating to sealing of pipe joints
GB1569400A (en) * 1976-03-31 1980-06-11 Bristol Prod Coupler for tube
GB2016630A (en) * 1978-02-03 1979-09-26 Wavin Bv Sealing of spigot and socket pipe joints
GB1555640A (en) * 1978-05-11 1979-11-14 C E & J P Britton Ltd Tube coupling
US4288113A (en) * 1979-07-06 1981-09-08 Parker-Hannifin Corporation Quick connector coupling for semi-rigid hose
US4463974A (en) * 1980-10-27 1984-08-07 Maremont Corporation Coupling with improved tube-gripping member
EP0064315A2 (en) * 1981-05-01 1982-11-10 Wavin B.V. A tensile resistant pipe connection and a socket provided with an end cap
EP0073083A1 (en) * 1981-08-20 1983-03-02 Wavin B.V. Sealing ring
GB2125500A (en) * 1982-08-10 1984-03-07 Paragon Plastics Limited Push-fit plumbing fittings

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997006380A1 (en) * 1995-08-05 1997-02-20 Uponor Limited Pipe joint
US5951058A (en) * 1995-08-05 1999-09-14 Uponor Limited Pipe joint
WO2005103550A1 (en) * 2004-04-23 2005-11-03 Henn Gmbh & Co. Kg Plug-in connection comprising a moulded sealing ring
CN108361457A (en) * 2018-02-28 2018-08-03 邓华明 Automatic-sealed quick coupling
EP4028681A4 (en) * 2019-09-12 2023-09-20 S & B Technical Products, Inc. Lightweight sealing gasket for low pressure and non-pressure applications

Also Published As

Publication number Publication date
GB2180310B (en) 1989-08-23
GB8522730D0 (en) 1985-10-16

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980913