EP0082846A1 - Reseau de conduites d'ecoulement d'un fluide - Google Patents

Reseau de conduites d'ecoulement d'un fluide

Info

Publication number
EP0082846A1
EP0082846A1 EP19820900373 EP82900373A EP0082846A1 EP 0082846 A1 EP0082846 A1 EP 0082846A1 EP 19820900373 EP19820900373 EP 19820900373 EP 82900373 A EP82900373 A EP 82900373A EP 0082846 A1 EP0082846 A1 EP 0082846A1
Authority
EP
European Patent Office
Prior art keywords
duct
fluid flow
ductwork
annular
control means
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.)
Withdrawn
Application number
EP19820900373
Other languages
German (de)
English (en)
Inventor
Edward Warren
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.)
BELLANG CONSULTANTS Ltd
T I FLEXIBLE TUBES Ltd
Original Assignee
BELLANG CONSULTANTS Ltd
T I FLEXIBLE TUBES Ltd
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 BELLANG CONSULTANTS Ltd, T I FLEXIBLE TUBES Ltd filed Critical BELLANG CONSULTANTS Ltd
Publication of EP0082846A1 publication Critical patent/EP0082846A1/fr
Withdrawn legal-status Critical Current

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
    • F16L27/10—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations
    • F16L27/107—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations the ends of the pipe being interconnected by a flexible sleeve
    • F16L27/11—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations the ends of the pipe being interconnected by a flexible sleeve the sleeve having the form of a bellows with multiple corrugations
    • 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
    • F16L17/06—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between the end surfaces of the pipes or flanges or arranged in recesses in the pipe ends or flanges
    • F16L17/067—Plastics sealing rings
    • F16L17/073—Plastics sealing rings the sealing rings having two lips parallel to each other

Definitions

  • This invention relates to fluid flow ductrorrk.
  • T'he invention relates particularly to ductwork of the kind in which adjacent duct ends carry annular grooves which in use locate the terminal radially inwardly directed flanges of a split clamp ring which in turn retains a flexible annular seal whose radially inwardly directed terminal lips make sealing engagement against the corresponding ducts between the annular grooves and the duct ends.
  • This kind of coupling will he referred tc hereinafter as "of the type specified”, as will also ducts designed for use with such couplings.
  • the annular seal is so formed that positive fluid pressure within the seal acts to force the sealing lips into contact with the duct walls, thereby enhancing the sealing effect.
  • expansion joints have been regarded as extranecus components provided by their respective manufacturers in a full range each having its appropriate means for securing in a run of ductwork.
  • some expansion joints are provided with flanged ends, some with threaded ends, and some with plain weldable end sections; but in each case when such a joint is used to join ducts of the type specified, this has required modification of the ends of the adjacent ducts which it joins, as well as the provision of extraneous fastening components or the use of welding equipment.
  • This invention serves to provide enhanced flexibility in ductwork of the type specified while eliminating all need for the introduction of extraneous joint components, and accordingly comprises a fluid flow duct of which at least one end is formed with an annular clamp-locating groove in its outer surface and which is formed intermediate its ends with a flexible portion.
  • the flexible portion may provide longitudinal, lateral or angular movement, or any relevant combination of these.
  • Themovement control means may be secured to one end only of the duct, or to both ends, to achieve the desired control.
  • both ends of the duct When intended for installat ion in an intermediate position in a run of ductwork of the type specified. both ends of the duct will be formed with respective annular clamp-locating grooves.
  • the invention also comprises a run of fluid flow ductwork including at least one duct as defined in either of the three preceding paragraphs joined in the run by coupling means of the type specified.
  • Figure 1 shows a partly-sectioned side elevation of a fluid-flow duct embodying the invention, coupled to a second duct by means of a coupling of the type specified
  • Figures 2A to 2D are respective side elevations, also partly sectioned, of four ducts embodying the invention and provided with respective movement control means.
  • the duct embodying the invention, represented at 1 is coupled to a second duct 2 by a split clamping ring 3.
  • the ends of the ducts 1 and 2 are grooved at 1' and 2' respectively, and the clamping ring has terminal radially inwardlydirected flanges 3' which engage the grooves and secure theducts together.
  • the two halves of the clamping ring 3 areprovided with mating flanges 3a, which are secured togetherby bolts 4 and co-operating nuts (not shown).
  • the clampingring 3 in addition to its function in securing the two ducts together, also serves to accommodate an annular seal 5.
  • the seal has inwardly directed lips 5' which engage the ends of the duct 1 and the duct 2 , and the re-entrant radial cross-section of the seal, which can be seen in the Figure, ensures that positive pressure in the fluid within the ductwork forces the lips 5' into sealing engagement with the duct walls, thus enhancing the sealing action.
  • the duct 1 it will be seen that it comprises two end portions 1a, which carry the grocves 1'. and a central bellows portion 1b, whose ends are secured under sealing rings 1c, which together with the bellows are welded to the end portions at 1d, thus providing an integral and expansible duct which may be connected as a standard duct of the type specified. In this way, the run of ductwork can be provided with enhanced expansibility, without the need for extraneous flexible joints and alternative coupling means.
  • Figure 1 of the Drawings The arrangement illustrated in Figure 1 of the Drawings is primarily intended to illustrate the principle of the invention, although it can be used in the illustrated form.
  • this type of flexible duct is generally provided integrally with means secured to at least one end portion to restrict the freedom of movement of the flexible portion so that it will deform in a required manner, but will not "snake" uncontrollably.
  • Figures 2A to 2D show ducts according to the invention with a range of movement control means. In each of these Figures, the duct itself is generally similar to that illustrated in Figure 1 and so will not be described in detail .
  • the simplest movement control means is shown in Figure 2A, which illustrates a longitudinal expansion joint.
  • a rigid internal sleeve 10 extending generally parallel to the duct within the latter.
  • the sleeve 10 is flared slightly outwardly at its left-hand end, contacting the inner surface of the duct end 1a. to which it is secured by a weld.
  • the sleeve 10 thus acts as a guide for the bellows, and also serves to reduce turbulence which would otherwise be induced in fluid flowing through the tube by the corrugations of the bellows.
  • a telescopically sliding protective cover may be secured outside the bellows to protect it from damage or obstruction.
  • Figure 2B illustrates an angular joint constructed in accordance with the invention.
  • pairs of lugs 20a, 20b welded to the duct ends carry links 21a, 21b which in turn are pivotally connected by pins 22.
  • the pins 22 are retained in position by circlips (unreferenced). It will be readily understood that the linkage 20, 21, 22 permits only angular movement of the joint.
  • FIG. 2C illustrates a lateral joint constructed in accordance with the invention.
  • each of the duct ends 1a carries a pair of welded-on brackets 3C, each of which has a flange 31 extending generally in a plane perpendicular to the longitudinal axis of the duct end.
  • Each flange 31 is bored at 32, parallel to the longitudinal axis of the duct end, and that end of each bore 32 adjacent the open end of the duct end 1a is formed with a spnerically concave flare 32'.
  • the flarred portions 32' serve to seat ball-ended nuts 33 which are threaded on to the ends of a pair of tie-rods 34 each of which passes through the bores 32 in two corresponding flanges 31 at opposite ends of the unit.
  • the nuts 33 are screwed tight en the tie-rods, and the spherical mating surfaces of the flared portions 32' and the nuts 33 then permit relative lateral movement of the end portions la without permitting expansion of the bellows, which here takes the form of two separate bellows sections linked by a central section of rigid tube.
  • Figure 2D illustrates another form of joint providing lateral movement.
  • the control of movement is implemerited by means of a braided metal sleeve 40 welded to collars 41 which are themselves welded to the duct ends 1a.
  • the woven structure of the sleeve 40 renders it substantially inextensible parallel to its longitudinal axis, with the result that the duct is substantially inextensible parallel to its length, and has little ability to undergo angular deflection about a central point.
  • the braided sleeve can be deformed into a shallow "S" shape and thus the joint can accommodate relative lateral displacement of the duct ends.
  • movement-control means for example a gimbal mount to give pivotal articulation in three dimensions about the centre of the joint, but in each case the result will be a self-contained expansion joint, immediately available for installation in ductwork employing coupling means of the type specified.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Joints Allowing Movement (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)

Abstract

Une nouvelle conduite est destinee a etre inclue dans un reseau de conduites du type ou des extremites adjacentes de conduites portent des rainures annulaires (1', 2') qui positionnent des brides terminales dirigees radialement vers l'interieur (3') d'une bague de bridage fendue (3) qui a son tour retient un joint annulaire flexible (5) dont les levres terminales dirigees radialement vers l'interieur (5') sont en engagement d'etancheite contre les conduites. La conduite est formee a ses extremites avec des rainures annulaires de positionnement de bridage (1') et entre ses extremites avec une partie flexible (1b), assurant ainsi la flexibilite du reseau de conduites de ce type sans avoir recours a des moyens de couplage etrangers.
EP19820900373 1981-01-27 1982-01-27 Reseau de conduites d'ecoulement d'un fluide Withdrawn EP0082846A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8102368 1981-01-27
GB8102368 1981-01-27

Publications (1)

Publication Number Publication Date
EP0082846A1 true EP0082846A1 (fr) 1983-07-06

Family

ID=10519246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820900373 Withdrawn EP0082846A1 (fr) 1981-01-27 1982-01-27 Reseau de conduites d'ecoulement d'un fluide

Country Status (4)

Country Link
EP (1) EP0082846A1 (fr)
JP (1) JPS58500135A (fr)
GB (1) GB2114696B (fr)
WO (1) WO1982002581A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB763972A (en) * 1953-09-30 1956-12-19 Andre Rubber Co Improvements in or relating to flexible couplings for pipes
GB1135154A (en) * 1967-05-16 1968-12-04 Automatic Sprinkler Corp Improvements in or relating to pipe coupling
SE7412772L (fr) * 1973-10-13 1975-04-14 Pforzheim Metallschlauch
FR2369497A1 (fr) * 1976-10-27 1978-05-26 Semt Dispositif d'accouplement de tuyauterie a compensation de dilatation thermique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8202581A1 *

Also Published As

Publication number Publication date
GB2114696A (en) 1983-08-24
WO1982002581A1 (fr) 1982-08-05
GB8308961D0 (en) 1983-05-11
GB2114696B (en) 1984-06-06
JPS58500135A (ja) 1983-01-20

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19830301

AK Designated contracting states

Designated state(s): AT BE CH DE FR LI LU NL SE

R17P Request for examination filed (corrected)

Effective date: 19830228

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19840801

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WARREN, EDWARD