GB2029537A - Universal joint for fluid conduits - Google Patents
Universal joint for fluid conduits Download PDFInfo
- Publication number
- GB2029537A GB2029537A GB7924077A GB7924077A GB2029537A GB 2029537 A GB2029537 A GB 2029537A GB 7924077 A GB7924077 A GB 7924077A GB 7924077 A GB7924077 A GB 7924077A GB 2029537 A GB2029537 A GB 2029537A
- Authority
- GB
- United Kingdom
- Prior art keywords
- connectors
- universal joint
- radially
- joint according
- connector
- 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
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
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/02—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction
- F16L27/04—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces
-
- 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
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
- F16L27/0849—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid being turned through an angle when passing from one joint element to another
- F16L27/0857—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid being turned through an angle when passing from one joint element to another with hinge and bellows sealing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints Allowing Movement (AREA)
Abstract
A universal joint for a fluid conduit comprises a pair of tubular connectors (1, 2) joined by a bellows (3) and capable of articulation wherein, to restrain movement apart of the connectors (1, 2), a tubular sleeve (29) is provided to extend over the joint between the connectors (1, 2) and bearing means are provided between end portions of the sleeve (29) and the respective connectors (1, 2), the bearing means comprising, for each connector, diametrically opposed pivotable connectors with the connections on one connector (1) angularly displaced by 90 DEG from the connections on the other connector (2). The connections may be provided between radially inwardly directed continuous flanges (29a) or brackets (30) on the sleeve (29) and radially outwardly directed flanges (32) or brackets on the connectors (1, 2) and rollers (31) may be provided between the brackets or flanges and have locating means (33, 34, 35). <IMAGE>
Description
SPECIFICATION
Universal joint for fluid conduits
The invention relates to a universal joint for a fluid conduit and particularly to a bellows sealed universal joint capable of angulating through 360'.
Such a joint can be used in a pipe or ducting carrying a fluid, particularly air, for example ducted hot air in an aircraft, to cater for thermal expansion, installation tolerances and vibration.
When an internal pressure is applied to bellows an end load is produced which must be restrained to prevent stretching of the bellows and damage to adjacent structures.
The purpose of this invention is to provide a suitable restraining mechanism whilst permitting the required angulation.
According to the invention a universal joint for a fluid conduit comprises a pair of tubular connectors joined by a bellows and to be inserted in the conduit to connect together two adjacent parts of the conduit, wherein, to restrain movement apart of the connectors of the pair of connectors, a tubular sleeve is provided to extend over the joint between the connectors and bearing means are provided between end portions of the tubular sleeve and the respective connectors, the bearing means comprising, for each connector, diametrically oppositely disposed pivotable connections with said connections on one of the connectors angularly displaced by 90 from such connections on the other connector.
Preferably the connections comprise radially inwardly projecting means at each end of the tubular sleeve and radially outwardly projecting means for each connector to bear against said radially inwardly projecting means.
The radially inwardly and radially outwardly projecting means may comprise continuous flanges or brackets on the tubular sleeve and the connectors respectively.
Advantageously the radially inwardly extending means bears against said radially outwardly extending means with the interposition therebetween of bearing rollers. Preferably the bearing rollers have oppositely directed locating arms thereon, one of the locating arms engaging between locating flanges on an annular bearing ring secured to the respective connector and forming said radially outwardly projecting means and the other of the locating arms engaging in cut-outs in the radially inner edge of a flange forming said radially inwardly directed means. The radially inner edge can be a chordally extending portion of a continuous flange or of a bracket forming said radially inwardly extending means.
Alternatively the radially inwardly directed means comprise trunnions mounted in said tubular sleeve. Bearing bushes may be provided on the trunnions.
Inwardly projecting pins may be provided secured to the tubular ring and extending, with clearance, into apertures in overlapping extensions of the tubular connectors.
The invention is diagrammatically illustrated by way of example in the accompanying drawings, in which: Figure 1 is a fragmentary sectional elevation of a first embodiment of a universal joint for a fluid conduit according to the invention and incorporating a roller mechanism;
Figure 2 is a fragmentary sectional elevation of a second embodiment of the invention incorporating a bearing bush mechanism;
Figure 3 is a fragmentary sectional elevation of a third embodiment of the invention incorporating a sliding plate mechanism;
Figure 4 shows a fragmentary view taken in the direction of arrow IV of Fig. 3;
Figure 5 is a fragmentary sectional elevation of a fourth embodiment of the invention including bearing locating means; and
Figure 6 is a fragmentary view taken in the direction of arrow VI of Fig. 5.
Each of the illustrated embodiments has connectors 1 and 2 to be secured to the adjacent ends of pipes or lengths of ducting to be joined and through which fluid is to pass. The connectors 1 and 2 are formed with spherically shaped portions 1 a and 2a, with the portion 2a sliding or angulating within the portion 1 a to form a "knuckle joint" and a bellows 3 connected at its opposite ends to the connectors 1 and 2 respectively to form a sealed connection therebetween. End loads, resulting from pressure in the bellows 3, are restrained in the embodiment of Fig. 1 by a tubular member 5 which extends over the portions 1 a and 2a and has an inturned flange 5a at one end. At its other end the tubular member 5 has a ring 6 or a pair of brackets of angular section welded or otherwise firmly fixed thereto, the ring 6 or each, of the brackets having an inturned flange 6a.A ring 7 or a pair of angular brackets with a flange or flanges 7 a extending parallel to the flange 6a is or are welded or otherwise secured on the connector 1. A pair of diametrically oppositely located bearing rollers are mounted between the flanges 6 a and 7 a. A further pair of bearing rollers (not shown) similar to the bearing rollers 4 are provided between the flange 5a and flanges or a flange, equivalent to the flanges or flange 7a, on a pair of brackets or a ring similar to the ring 7 secured on the connector 2, the positions of such further pair of bearing rollers being diametrically opposite one another and 90 offset from the rollers 4.
The bearing rollers 4 and further bearing rollers absorb end loads resulting from pressure in the bellows 3 and provide means of angulating the joint, during angulation the bearing rollers oscillating between the flanges between which they are located. The ring 6 could be omitted, a further flange, corresponding to the flange 5a, being provided at the position of the flange 7a on the ring 5.
In the embodiment of Fig. 2, a tubular ring 1 5 has a pair of inwardly extending trunnions 9 diametrically oppositely disposed in each end thereof with the opposite ends 90 out of alignment. Bearing bushes 8 are rotatable on the trunnions 9 and bear on flanges 1 7a of respective brackets 1 7 secured to the connectors 1 and 2.
In the embodiment of Figs. 3 and 4, a tubular ring 25 has angular section brackets 26 welded thereto, the brackets 26 each having a radially inwardly extending flange 26a. The flanges 26a bear against radially extending flanges 27a of respective brackets 27 welded to the connectors 1 and 2, the brackets 27 being provided in pairs at diametrically opposed positions at each end with the opposite ends 90 out of alignment.
Two pairs of inwardly directed pins 28 are secured to the ring 25 and extend, with clearance, into apertures in the portions 1 a and 2a of the connectors 1 and 2 to assist angulation.
The pins 28 are also capable of restraining the joint in the unlikely event of the primary structure failing. Inturned flanges could be provided at the ends of the ring 25 instead of the brackets with the flanges 26a if preferred.
In the embodiment of Figs. 5 and 6, a tubular ring 29 has its ends spun down to form flanges 29a over retaining angles 30 to locate rollers 31 between an annular bearing ring 32, welded to the respective connector 1 and 2, and the retaining angle 30.
The rollers 31, have involute shaped locating arms 33, to engage between locating flanges 34, on the bearing rings 32 and slots 35, formed by cut-outs in chordally extending inner edge portions 30a of the retaining angles 30 to ensure controlled movement during angulation of joints.
Alternatively the two bearing rings 30 could be replaced by four separate segments, welded to the connectors 1 and 2.
A joint according to the invention can have a simple bellows-sealed "knuckle type" joint restrained by a rolling or sliding mechanism; a variable bellows bore depending on flow requirements; low bending moments under pressure; and a secondary load carrying capability through the pins 28 which provide a "fail-safe" feature in the unlikely event of the primary structure failing.
It can also have a limited controlled leak to ambient between the portions 1 a and 2a should the bellows 3 fail; full protection for the bellows 3 against external damage; easy assembly with the bellows 3 previously installed in the connections 1 and 2; low cost; and no torque load on the bellows.
Claims (11)
1. A universal joint for a fluid conduit
comprising a pair of tubular connectors joined
by a bellows and to be inserted in the conduit
to connect together two adjacent parts of the
conduit, wherein, to restrain movement apart
of the connectors of the pair of connectors, a
tubular sleeve is provided to extend over the
joint between the connectors and bearing
means are provided between end portions of
the tubular sleeve and the respective connect
tors, the bearing means comprising, for each
connector, diametrically oppositely disposed
pivotable connections with said connections
on one of the connectors angularly displaced
by 90 from such connections on the other
connector.
2. A universal joint according to claim 1,
in which said connections comprise radially
inwardly projecting means at each end of the
tubular sleeve and radially outwardly projec
ting means from each connector to bear
against said radially inwardly projecting
means.
3. A universal joint according to claim 2,
in which said radially inwardly projecting
means and/or said radially outwardly projec
ting means comprises a continuous flange.
4. A universal joint according to claim 2,
in which said radially inwardly projecting
means and/or said radially outwardly projec
ting means comprises brackets secured to said
tubular sleeve and said connectors respec
tively.
5. A universal joint according to any one
of claims 2 to 4, in which said radially in
wardly extending means bears against said
radially outwardly extending means with the
inter-position therebetween of bearing rollers.
6. A universal joint according to claim 5,
in which the bearing rollers have oppositely
directed locating arms thereon, one of the
locating arms engaging between locating
flanges on an annular bearing ring secured to
the respective connector and forming said
radially outwardly projecting means and the
other of the locating arms engaging in cut
outs in the radially inner edge of a flange
forming said radially inwardly directed means.
7. A universal joint according to claim 7,
in which said radially inner edge is a chordally
extending portion of a continuous flange or a
bracket forming said radially inwardly extend
ing means.
8. A universal joint according to any one
of claims 2 to 4, in which said radially in
wardly directed means comprise trunnions
mounted in said tubular sleeve.
9. A universal joint according to claim 8,
including bearing bushes mounted on said
trunnions.
10. A universal joint according to any one
of claims 1 to 9, including inwardly directed
pins secured to the tubular ring and extend
ing, with clearance, into apertures in overlap I ping extensions of the tubular connectors.
11. A universal joint for a fluid conduit substantially as hereinbefore described and illustrated with reference to Fig. 1, Fig. 2,
Figs. 3 and 4 or Figs. 5 and 6 of the accompanying drawings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7924077A GB2029537B (en) | 1978-07-14 | 1979-07-11 | Universal joint for fluid conduits |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7829824 | 1978-07-14 | ||
GB7924077A GB2029537B (en) | 1978-07-14 | 1979-07-11 | Universal joint for fluid conduits |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2029537A true GB2029537A (en) | 1980-03-19 |
GB2029537B GB2029537B (en) | 1982-10-20 |
Family
ID=26268210
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7924077A Expired GB2029537B (en) | 1978-07-14 | 1979-07-11 | Universal joint for fluid conduits |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2029537B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2515308A1 (en) * | 1981-10-24 | 1983-04-29 | Ward Leslie | Universal joint for fluid conduit - has tubular connectors with spherical sliding portions sealed by bellows |
US4508373A (en) * | 1982-10-25 | 1985-04-02 | Ward Leslie M | Universal joint |
US4643463A (en) * | 1985-02-06 | 1987-02-17 | Pressure Science Incorporated | Gimbal joint for piping systems |
EP0519636A1 (en) * | 1991-06-14 | 1992-12-23 | Toyota Jidosha Kabushiki Kaisha | Flexible joint for an exhaust pipe |
US6631928B1 (en) * | 2000-02-29 | 2003-10-14 | Asahi Beer Engineering Ltd. | Expansion joint device |
WO2005085698A2 (en) * | 2004-03-04 | 2005-09-15 | Lesmar Associates Limited | Joints |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1278063A (en) * | 1968-09-20 | 1972-06-14 | Plessey Co Ltd | Improvements in or relating to pull-relieved bellows joints for pipes or the like |
-
1979
- 1979-07-11 GB GB7924077A patent/GB2029537B/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1278063A (en) * | 1968-09-20 | 1972-06-14 | Plessey Co Ltd | Improvements in or relating to pull-relieved bellows joints for pipes or the like |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2515308A1 (en) * | 1981-10-24 | 1983-04-29 | Ward Leslie | Universal joint for fluid conduit - has tubular connectors with spherical sliding portions sealed by bellows |
US4508373A (en) * | 1982-10-25 | 1985-04-02 | Ward Leslie M | Universal joint |
US4643463A (en) * | 1985-02-06 | 1987-02-17 | Pressure Science Incorporated | Gimbal joint for piping systems |
EP0519636A1 (en) * | 1991-06-14 | 1992-12-23 | Toyota Jidosha Kabushiki Kaisha | Flexible joint for an exhaust pipe |
US5318329A (en) * | 1991-06-14 | 1994-06-07 | Toyota Jidosha Kabushiki Kaisha | Flexible joint for an exhaust pipe |
US6631928B1 (en) * | 2000-02-29 | 2003-10-14 | Asahi Beer Engineering Ltd. | Expansion joint device |
WO2005085698A2 (en) * | 2004-03-04 | 2005-09-15 | Lesmar Associates Limited | Joints |
WO2005085698A3 (en) * | 2004-03-04 | 2005-11-03 | Lesmar Associates Ltd | Joints |
Also Published As
Publication number | Publication date |
---|---|
GB2029537B (en) | 1982-10-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |