AU2006235947A1 - Pipe connecting apparatus - Google Patents
Pipe connecting apparatus Download PDFInfo
- Publication number
- AU2006235947A1 AU2006235947A1 AU2006235947A AU2006235947A AU2006235947A1 AU 2006235947 A1 AU2006235947 A1 AU 2006235947A1 AU 2006235947 A AU2006235947 A AU 2006235947A AU 2006235947 A AU2006235947 A AU 2006235947A AU 2006235947 A1 AU2006235947 A1 AU 2006235947A1
- Authority
- AU
- Australia
- Prior art keywords
- pipe
- spigot
- connecting apparatus
- pipe connecting
- crimping sleeve
- 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.)
- Abandoned
Links
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- Joints With Sleeves (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Description
S&FRef: 776117
AUSTRALIA
PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT Name and Address of Applicant: Actual Inventor(s): Address for Service: Invention Title: Iplex Pipelines Australia Pty Limited, an Australian company, ACN 079 613 308, of Level 14, Philips House, 15 Blue Street, North Sydney, New South Wales, 2060, Australia Robert Bozidar Podnar Philip Greer Spruson Ferguson St Martins Tower Level 31 Market Street Sydney NSW 2000 (CCN 3710000177) Pipe connecting apparatus The following statement is a full description of this invention, including the best method of performing it known to me/us:- 5845c(255333_1)
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Pipe Connecting Apparatus 0 Z Technical Field The present invention relates to a pipe connecting apparatus and has been developed primarily for use in connecting gas pipes up to 110 mm in diameter. However, it will be appreciated that the invention is not limited to this particular field and may also be used in 'n larger gas pipes or water pipes.
(Ni IND Background of the Invention A known gas pipe connecting apparatus includes a fitting having a hollow body and a hollow ribbed spigot extending from the body. An O-ring is provided around the spigot.
In use, a composite pipe is sleeved over the spigot and a plastic or brass crimp sleeve is then crimped around the pipe to squeeze the pipe into sealing engagement with the 0ring.
A disadvantage of such known gas pipe connecting apparatus is that the O-ring is often Is lost, which leads to installation delays. Also, without the O-ring, the apparatus does not provide an adequate seal between the fitting and pipe, resulting in leaks.
A further disadvantage of known apparatus using O-rings is that the O-rings can be pinched or misaligned during the installation process, resulting in leaks.
Yet another disadvantage of apparatus incorporating O-rings is that the O-rings deteriorate with age, resulting in leaks.
Object of the Invention It is the object of the present invention to substantially overcome or at least ameliorate one or more of the above disadvantages.
Summary of the Invention In a first aspect, the present invention provides a pipe connecting apparatus comprising: a pipe fitting having a spigot extending along a longitudinal axis, and adapted to have a pipe sleeved thereover, a plurality of circumferential channels extending around (1763562)
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Ssaid spigot and spaced apart along said axis, said channels defining barbs therebetween; o and Z a crimping sleeve formed from a malleable material and adapted to be crimped around said pipe to deform said pipe against said barbs and create a substantially fluid tight seal directly between said pipe and said spigot.
The malleable material is preferably a metal and more preferably is annealed copper.
Cc However, annealed aluminium can alternatively be used.
IND
The barbs preferably have a height, measured in a direction normal to said axis, of about 0.3mm between about 1% and about 1.5% of an outer diameter of said spigot. More preferably, the barbs have a height, measured in a direction normal to said axis, of about 0.3mm between about 1.2% and about 1.3% of an outer diameter of said spigot. Even more preferably, the barbs have a height, measured in a direction normal to said axis, of Is about 0.3mm about 1.28% of an outer diameter of said spigot. The barb heights are preferably between about 0.4mm and about 0.5mm for spigot outer diameters of between about 12mm and about 20mm. The barb heights are preferably between about 0.55mm and about 0.65mm for a spigot outer diameter of about 26mm.
The barbs preferably have a spacing of between about 1mm and about 2mm. More preferably, the barb spacing is between about 1mm and about 1.5mm, and most preferably, between about 1.2mm and about 1.3mm. At least five barbs are preferably provided.
A retaining collar is preferably engaged with the fitting for captively retaining the crimping sleeve to the fitting. The retaining collar preferably includes a larger diameter portion and a smaller diameter portion defining an annular flange therebetween extending substantially normal to said axis. An outer diameter of said smaller diameter portion is preferably marginally greater than an inner diameter of said crimping sleeve, such that the crimping sleeve is snugly slidably engageable over said smaller diameter portion and retained thereto by friction. An inner diameter of said retaining collar is preferably marginally smaller than an outer diameter of said spigot, such that said collar is snugly slidably engageable over said spigot and retained thereto by friction.
(1 76356_2)
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ci An end of said crimping sleeve is preferably engageable with said annular flange to Odefine an operative position of said crimping sleeve. The crimping sleeve preferably Z includes at least one aperture to provide a visual indication of engagement of said pipe _with said spigot.
The pipe is preferably formed a composite of metal and plastics. More preferably, the pipe comprises an inner layer of PE-Xc, a middle layer of aluminium, and an outer layer c of PE-HD. A coupling agent is preferably provided between the inner layer and the INO middle layer and also between the outer layer and the middle layer. The pipe is 0o preferably a gas pipe, and a substantially gas tight seal is preferably created directly between said pipe and said spigot.
The fitting is preferably formed from a metal, such as brass.
A width of said substantially fluid tight seal, measured parallel with said axis, is preferably greater than about 4mm. More preferably, the width of said seal is greater than about 7mm, and most preferably, the seal width is about 9mm.
In a second aspect, the present invention provides a method of connecting a pipe to a pipe fitting, said method comprising the steps of: providing a pipe fitting having a spigot extending along a longitudinal axis, a plurality of circumferential channels extending around said spigot and spaced apart along said axis, said channels defining barbs therebetween; sleeving a pipe over said spigot; and crimping a crimping sleeve formed from a malleable material around said pipe to create a substantially fluid tight seal directly between said pipe and said spigot.
The malleable material is preferably a metal and more preferably is annealed copper.
However, annealed aluminium or a deformable plastics material can alternatively be used.
The channels are preferably formed to provide the barbs with a height, measured in a direction normal to said axis, of about 0.3mm between about 1% and about 1.5% of an outer diameter of said spigot. More preferably, the barbs have a height, measured in a direction normal to said axis, of about 0.3mm between about 1.2% and about 1.3% of (1763562)
\O
San outer diameter of said spigot. Even more preferably, the barbs have a height, o measured in a direction normal to said axis, of about 0.3mm about 1.28% of an outer Z diameter of said spigot. The barb heights are preferably between about 0.4mm and about for spigot outer diameters of between about 12mm and about 20mm. The barb heights are preferably between about 0.55mm and about 0.65mm for a spigot outer diameter of about 26mm.
Cc The channels are preferably formed to provide the barbs with a spacing of between about IND Imm and about 2mm. More preferably, the barb spacing is between about 1mm and about 1.5mm, and most preferably between about 1.2mm and about 1.3mm. At least five barbs are preferably provided.
A retaining collar is preferably provided and is preferably engaged with the fitting for captively retaining the crimping sleeve to the fitting. The retaining collar is preferably is provided with a larger diameter portion and a smaller diameter portion defining an annular flange therebetween extending substantially normal to said axis. An outer diameter of said smaller diameter portion is preferably marginally greater than an inner diameter of said crimping sleeve, such that the crimping sleeve is snugly slidably engageable over said smaller diameter portion and retained thereto by friction. An inner diameter of said retaining collar is preferably marginally smaller than an outer diameter of said spigot, such that said collar is snugly slidably engageable over said spigot and retained thereto by friction.
An end of said crimping sleeve is preferably engageable with said annular flange to define an operative position of said crimping sleeve. The crimping sleeve preferably includes at least one aperture to provide a visual indication of engagement of said pipe with said spigot.
The pipe is preferably formed a composite of metal and plastics. More preferably, the pipe comprises an inner layer of PE-Xc, a middle layer of aluminium, and an outer layer ofPE-HD. A coupling agent is preferably provided between the inner layer and the middle layer and also between the outer layer and the middle layer. The pipe is preferably a gas pipe, and a substantially gas tight seal is preferably created directly between said pipe and said spigot.
(176356_2) The fitting is preferably formed from a metal, such as brass.
The substantially fluid tight seal created in said crimping step preferably has a width, s measured parallel to said axis, of greater than about 4mm. More preferably, the width of said seal is greater than about 7mm, and most preferably, the seal width is about 9mm.
The crimping step is preferably performed using a pair or crimping pliers. More preferably, the crimping pliers are provided with flanges having a width of greater than io about 4mm. More preferably, the width of said crimping flanges is greater than about 7mm, and most preferably, the crimping flanges have a width of about 9mm.
Brief Description of the Drawings A preferred embodiment will now be described, by way of an example only, with reference to the accompanying drawings, in which: Fig 1 is a cross-sectional view of a preferred embodiment of a pipe connecting apparatus; and Fig 2 is a cross-sectional view of the pipe connecting apparatus of Fig 1, shown in use connecting two pipes.
Detailed Description of the Preferred Embodiment Figs 1 and 2 show a preferred embodiment of a pipe connecting apparatus 10. The apparatus 10 comprises a pipe fitting in the form of a brass joiner 12. The brass joiner 12 is symmetrical, and accordingly, for brevity, only the right hand side is described below.
The brass joiner 12 has a spigot 14 extending along a longitudinal axis 16. The spigot 14 includes a plurality of circumferential channels 18 extending around its outer surface and spaced apart along the axis 16. The channels 18 define five barbs 20 therebetween having a spacing S and width W, measured parallel to the axis 16, of about 1.25mm.
The barbs 20 have a height H, measured in a direction normal to the axis 16, of about 0.3mm about 1.28% of an outer diameter of the spigot 14. The table below lists spigots 14 of various outer diameters OD, as well as the barb heights H and pipe inner diameters ID corresponding to these spigot outer diameters OD.
(176356_2) -6-
\O
O
tc,
\O
I
z Spigot OD (mm) Barb Height (mm) Pipe Inner Diameter (mm) 11.8 0.45 11.9 15.3 0.45 15.5 19.9 0.45 20.0 25.35 0.6 26.1 A retaining collar 22 is engaged with the fitting 12 for captively retaining an annealed copper crimping sleeve 24 to the fitting 12 adjacent the spigot 14. The retaining collar 22 includes a larger diameter portion 26 and a smaller diameter portion 28 defining an annular flange 30 therebetween extending substantially normal to the axis 16. An outer diameter of the smaller diameter portion 28 is marginally greater than an inner diameter of the crimping sleeve 24, such that the crimping sleeve 24 is snugly slidably engageable over the smaller diameter portion 28 and retained thereto by friction. Engagement of the end of the crimping sleeve 24 with the annular flange 30 of the collar 22 defines an operative position of the crimping sleeve 24. Similarly, an inner diameter of the retaining collar 22 is marginally smaller than an outer diameter of the spigot 14, such that the collar 22 is snugly slidably engageable over the spigot 14 and retained thereto by friction. The fitting 12 is provided with the retaining collar 22 and crimping sleeve 24 pre-installed, as shown in Fig 1.
The fitting 12 is adapted for use with a composite gas pipe 32. The pipe 32 comprises an inner layer of PE-Xc, a middle layer of aluminium, and an outer layer of PE-HD, and a coupling agent between the outer and inner layers and the middle layer. To connect the fitting 12 to the pipe 32, as shown in Fig 2, an end of the pipe 32 is sleeved over one of the spigot 14 until it abuts the smaller diameter portion 28 of the retaining collar 22. A pair of apertures 34 in the crimping sleeve 24 allow the pipe 32 to be seen underneath the crimping sleeve 24 to confirm that the pipe 32 has been fully inserted. Next, the crimping sleeve 24 is crimped around the pipe 32 by a pair of crimping pliers (not shown) to deform the pipe 32 against the barbs 20 and create a substantially gas tight seal directly between the pipe 32 and the spigot 14. The crimping pliers (not shown) have crimping flanges of about 9mm wide to create a crimped zone on the crimping sleeve 24 of about 9mm long measured parallel to the axis 16. Accordingly, the seal between the pipe 32 and the spigot 14 is also about 9mm long measured parallel to the axis 16.
(1763562) It will be appreciated that the illustrated pipe connecting apparatus 10 provides for effective gas pipe 32 connection without requiring an O-ring. Accordingly, the down time associated with lost O-rings is advantageously avoided. Moreover, by avoiding the need to use O-rings for effective sealing, the pipe connecting apparatus 10 avoids the other problems associated with O-rings, such as pinching and/or misalignment, and deterioration with age.
Whilst the present invention has been described with reference only to specific embodiments, it will be appreciated that it may also be embodied in many other forms, for 0io example: the connecting apparatus 10 can be incorporated into other types of fittings, such as T-pieces, reducing joiners, elbows, and male and female adaptors; the connecting apparatus 10 can be applied to fittings for larger pipes, for example, pipes up to or greater than 110mm in diameter; the connecting apparatus 10 can be used for pipes carrying other fluids, such as water or waste; the crimping sleeve 24 may be formed from other annealed metals, for example annealed aluminium, or from a deformable plastics material; and/or the fitting 12 may be formed from another metal, such a steel, or from plastics.
(176356_2)
Claims (37)
1. A pipe connecting apparatus comprising: a pipe fitting having a spigot extending along a longitudinal axis, and adapted to have a pipe sleeved thereover, a plurality of circumferential channels extending around said spigot and spaced apart along said axis, said channels defining barbs therebetween; and a crimping sleeve formed from a malleable material and adapted to be crimped around said pipe to deform said pipe against said barbs and create a substantially fluid tight seal directly between said pipe and said spigot.
2. A pipe connecting apparatus according to claim 1, wherein the malleable material is a metal.
3. A pipe connecting apparatus according to claim 1, wherein the malleable material is annealed copper. is 4. A pipe connecting apparatus according to claim 1, wherein the malleable material is annealed aluminium. A pipe connecting apparatus according to claim 1, wherein the malleable material is a plastics material.
6. A pipe connecting apparatus according to any one of the preceding claims, wherein the barbs have a height, measured in a direction normal to said axis, of about 0.3mm between about 1% and about 1.5% of an outer diameter of said spigot.
7. A pipe connecting apparatus according to any one of the preceding claims, wherein the barbs have a height, measured in a direction normal to said axis, of about 0.3mm between about 1.2% and about 1.3% of an outer diameter of said spigot.
8. A pipe connecting apparatus according to any one of the preceding claims, wherein the barbs have a height, measured in a direction normal to said axis, of about 0.3mm about 1.28% of an outer diameter of said spigot.
9. A pipe connecting apparatus according to any one of the preceding claims, wherein the barb heights are between about 0.4mm and about 0.5mm for spigot outer diameters of between about 12mm and about A pipe connecting apparatus according to claim 9, wherein the barb heights are between about 0.55mm and about 0.65mm for a spigot outer diameter of about 26mm. (1 76356_2) \O I 11. A pipe connecting apparatus according to any one of the preceding claims, wherein Othe barbs have a spacing of between about mm and about 2mm. Z 12. A pipe connecting apparatus according to claim 11, wherein the barb spacing is between about 1mm and about
13. A pipe connecting apparatus according to claim 11, wherein the barb spacing is between about 1.2mm and about 1.3mm.
14. A pipe connecting apparatus according to any one of the preceding claims, further Cc comprising a retaining collar is engaged with the fitting for captively retaining the INO crimping sleeve to the fitting.
15. A pipe connecting apparatus according to claim 14, wherein the retaining collar includes a larger diameter portion and a smaller diameter portion defining an annular flange therebetween extending substantially normal to said axis.
16. A pipe connecting apparatus according to claim 15, wherein an outer diameter of said smaller diameter portion is marginally greater than an inner diameter of said crimping sleeve, such that the crimping sleeve is snugly slidably engageable over said smaller diameter portion and retained thereto by friction.
17. A pipe connecting apparatus according to claim 15 or claim 16, wherein an inner diameter of said retaining collar is preferably marginally smaller than an outer diameter of said spigot, such that said collar is snugly slidably engageable over said spigot and retained thereto by fiction.
18. A pipe connecting apparatus according to any one of claims 14 to 17, wherein an end of said crimping sleeve is engageable with said annular flange to define an operative position of said crimping sleeve.
19. A pipe connecting apparatus according to any one of the preceding claims, wherein the crimping sleeve includes at least one aperture to provide a visual indication of engagement of said pipe with said spigot. A pipe connecting apparatus according to any one of the preceding claims, wherein the pipe is a gas pipe and said fluid tight seal is a gas tight seal.
21. A pipe connecting apparatus according to any one of the preceding claims, wherein the pipe is formed a composite of metal and plastics.
22. A pipe connecting apparatus according to claim 21, wherein the pipe comprises an inner layer of PE-Xc, a middle layer of aluminium, and an outer layer of PE-HD. (176356_2) \O N, 23. A pipe connecting apparatus according to claim 22, wherein a coupling agent is o provided between the inner layer and the middle layer and also between the outer layer Z and the middle layer.
24. A pipe connecting apparatus according to any one of the preceding claims, wherein the fitting is formed from a metal. A pipe connecting apparatus according to claim 24, wherein the fitting is formed from brass. Cc 26. A method of connecting a pipe to a pipe fitting, said method comprising the steps N of: providing a pipe fitting having a spigot extending along a longitudinal axis, a plurality of circumferential channels extending around said spigot and spaced apart along said axis, said channels defining barbs therebetween; sleeving a pipe over said spigot; and crimping a crimping sleeve formed from a malleable material around said pipe to Is create a substantially fluid tight seal directly between said pipe and said spigot.
27. A method according to claim 26, wherein the crimping sleeve is formed from a metal.
28. A method according to claim 27, wherein the crimping sleeve is formed from annealed copper.
29. A method according to claim 28, wherein the crimping sleeve is formed from annealed aluminium. A method according to any one of claims 26 to 29, comprising the further step of forming the channels to provide the barbs with a height, measured in a direction normal to said axis, of about 0.3mm between about 1% and about 1.5% of an outer diameter of said spigot.
31. A method according to any one of claims 26 to 29, comprising the further step of forming the channels to provide the barbs with a height, measured in a direction normal to said axis, of about 0.3mm between about 1.2% and about 1.3% of an outer diameter of said spigot.
32. A method according to any one of claims 26 to 29, comprising the further step of forming the channels to provide the barbs with a height, measured in a direction normal to said axis, of about 0.3mm about 1.28% of an outer diameter of said spigot. (1763562) -11- \O C 33. A method according to any one of claims 26 to 32, wherein the channels are formed o to provide barb heights between about 0.4mm and about 0.5mm for spigot outer diameters Z of between about 12mm and about
34. A method according to claim 33, wherein the channels are formed to provide barb heights between about 0.55mm and about 0.65mm for a spigot outer diameter of about 26mm. A method according to any one of claims 26 to 34, comprising the further step of forming the channels to provide the barbs with a spacing of between about 1 mm and \ID about 2mm.
36. A method according to claim 35, wherein the channels are formed to provide the barbs with a spacing of between about 1mm and about
37. A method according to claim 35, wherein the barb spacing is between about 1.2mm and about 1.3mm.
38. A method according to any one of claims 26 to 37, comprising the further step of is providing a retaining collar engaged with the fitting for captively retaining the crimping sleeve to the fitting.
39. A method according to claim 38, wherein the retaining collar is provided with a larger diameter portion and a smaller diameter portion defining an annular flange therebetween extending substantially normal to said axis.
40. A method according to claim 39, wherein an outer diameter of said smaller diameter portion is marginally greater than an inner diameter of said crimping sleeve, such that the crimping sleeve is snugly slidably engageable over said smaller diameter portion and retained thereto by friction.
41. A method according to claim 39 or claim 40, wherein an inner diameter of said retaining collar is marginally smaller than an outer diameter of said spigot, such that said collar is snugly slidably engageable over said spigot and retained thereto by friction.
42. A method according to any one of claims 38 to 41, comprising the further step of engaging an end of said crimping sleeve with said annular flange to define an operative position of said crimping sleeve.
43. A method according to any one of claims 26 to 42, comprising the further step of providing the crimping sleeve with at least one aperture to provide a visual indication of engagement of said pipe with said spigot.
44. A method according to any one of claims 26 to 43, wherein the pipe is a gas pipe and said fluid tight seal is a gas tight seal. (1763562) -12- \O N 45. A method according to any one of claims 26 to 44, comprising the further step of Sforming the pipe from a composite of metal and plastics. Z 46. A method according to claim 45, wherein the pipe is formed from an inner layer of PE-Xc, a middle layer of aluminium, and an outer layer of PE-HD.
47. A method according to claim 45, comprising the additional step of providing a coupling agent between the inner layer and the middle layer and also between the outer layer and the middle layer.
48. A method according to any one of claims 26 to 47, comprising the further step of IND forming the fitting from a metal.
49. A method according to claim 48, wherein the fitting is formed from brass. A method according to any one of claims 26 to 47, comprising the further step of forming the fitting from a plastics material.
51. A pipe connecting apparatus substantially as hereinbefore described with reference to the accompanying drawings.
52. A method of connecting a pipe to a pipe fitting, said method substantially as hereinbefore described with reference to the accompanying drawings. Dated 10 November, 2006 Iplex Pipelines Australia Pty Limited Patent Attorneys for the Applicant/Nominated Person SPRUSON FERGUSON (1 763562)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2006235947A AU2006235947A1 (en) | 2006-11-10 | 2006-11-10 | Pipe connecting apparatus |
| NZ55145906A NZ551459A (en) | 2006-11-10 | 2006-11-22 | Pipe connecting system |
| CNA2006101727521A CN101178139A (en) | 2006-11-10 | 2006-12-30 | Pipe connecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2006235947A AU2006235947A1 (en) | 2006-11-10 | 2006-11-10 | Pipe connecting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2006235947A1 true AU2006235947A1 (en) | 2008-05-29 |
Family
ID=39367484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2006235947A Abandoned AU2006235947A1 (en) | 2006-11-10 | 2006-11-10 | Pipe connecting apparatus |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101178139A (en) |
| AU (1) | AU2006235947A1 (en) |
| NZ (1) | NZ551459A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747858A (en) * | 2012-07-17 | 2012-10-24 | 迁安市科技发展促进中心 | Novel straight joint inside anti-seep stovepipe |
| CN104455881A (en) * | 2014-11-11 | 2015-03-25 | 贵州黔南科技塑业有限公司 | Plastic clamped aluminum-plastic pipe connector |
| CN105173584A (en) * | 2015-10-03 | 2015-12-23 | 任金瑞 | Seamless joint of watermelon field transportation track |
| CN106870840A (en) * | 2017-04-17 | 2017-06-20 | 天津中瑞邦络克管道联接技术有限公司 | A kind of mechanical splice |
| CN109764036A (en) * | 2019-03-21 | 2019-05-17 | 风范绿色建筑（常熟）有限公司 | A kind of square tube waterproof quick access device |
-
2006
- 2006-11-10 AU AU2006235947A patent/AU2006235947A1/en not_active Abandoned
- 2006-11-22 NZ NZ55145906A patent/NZ551459A/en not_active IP Right Cessation
- 2006-12-30 CN CNA2006101727521A patent/CN101178139A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| NZ551459A (en) | 2008-04-30 |
| CN101178139A (en) | 2008-05-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK4 | Application lapsed section 142(2)(d) - no continuation fee paid for the application |