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
  • 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
  • F16L37/12—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members
  • F16L37/138—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members using an axially movable sleeve

Definitions

• Coupling- device for detachable connection to the end of a tubs
• the present invention relates to a coupling device for detachable fixing to a pipe end, which around its periphery has a radially projecting flange against which an O-ring seal bears on the side facing the pipe end, as indicated in the pre-characterising clause of claim 1.
• a coupling device which can be fixed at a pipe end, which around its periphery has a radially projecting flange, against which an O-ring seal bears on the side facing the pipe end.
• a casing provided with backwardly /upwardly directed spring fingers is arranged behind the flange.
• a tubular coupling part is adapted to be attached on the pipe end. The fingers of the casing are then allowed to spring into recesses in the tubular coupling part, thereby fixing this to the pipe end. The spring fingers can be acted upon at the rear edge of the tubular coupling part and can be pressed inwards so that the coupling part can thereby be released.
• the said coupling requires separate fitting, both of the casing inside the flange on the pipe end and of the tubular coupling part. Fitting the coupling therefore becomes time-consuming. Nor is there any facility for easily verifying that the coupling device is correctly connected.
• One object of the present invention is to produce a coupling device of the type referred to above, which in one single operation will rapidly and easily produce a pressure-tight fixing at the pipe end, with clear indication that the coupling device is correctly connected, a coupling device which moreover can easily be fully dismantled without damaging the sealing ring but cannot be accidentally released from the pipe end.
• the object has been achieved by an arrangement having the characteristics indicated in claim 1.
• Preferred embodiments of the arrangement also have any or some of the characteristics indicated in the subordinate claims.
• Fig. la shows an exploded view of a coupling device according to the invention, which permits further coupling of a fluid flow, seen from a first angle
• Fig. lb shows an exploded view of the coupling device according to fig. la, seen from a second angle
• Fig. 2a shows an exploded view of a coupling device according to the invention, which stops a fluid flow through the coupling device, seen from a first angle
• Fig. 2b shows an exploded view of the coupling device according to fig. 2a, seen from a second angle
• Fig. 3a shows a detached view of the outer part of the coupling device according to fig. la and lb
• Fig. 3b shows a detached view of the outer part of the coupling device according to fig. 2a and 2b
• Fig. 4 shows the coupling device according to the invention with inner and outer part fixed to one another, but for the sake of clarity not fixed at a pipe end
• Fig. 5 shows a partial section through the coupling device according to the invention fixed at a pipe end
• Fig. la and lb show a coupling device 1 for detachable fixing at a pipe end 2, which around its periphery has a radially projecting flange 3 against which an O-ring seal 4 bears on its side facing the pipe end.
• the coupling device 1 comprises an essentially tubular inner part 5, the inside diameter of which essentially corresponds to the outside diameter of the pipe. At a first end the inner part has a sealing surface 6, which is adapted to bear tightly against the O-ring seal 4.
• the inner part 5 moreover has three arms 7, arranged around the periphery, which resiliently project radially past the first end of the tubular inner part. The arms 7 are directed so that hooks 8, formed at their ends and directed radially inwards, can pass freely over the flange 3 and the O-ring seal 4 when the inner part 5 is pushed on to the pipe end 2.
• the coupling device 1 moreover comprises an essentially tubular outer part 9, which from a first end is adapted to be passed over the inner part 5 from its second end and is thereby adapted to press the spring arms 7 radially inwards into an essentially axial orientation in which the hooks 8 are adapted to be brought into engagement behind the radially projecting flange 3.
• the inner part 5 has a fluid-tight connection to a flow element 10 in such a way that, when the coupling device 1 is fixed on the pipe end 2, fluid flow through the pipe via the inner part 5 and on into the flow element 10 is permitted.
• the inner and outer parts have interacting elements, which allow them to be fixed to one another by means of a twisting movement relative to one another.
• the said elements comprise at least one projection 11, formed on the periphery of the inner part and directed in the circumferential direction, which is adapted, when a twisting movement is applied, to engage in a complementary recess 12 formed on the inside of the outer part (see also fig. 3a and 3b), thereby preventing axial displacement of the inner and outer part relative to one another.
• the projection 11 and the recess 12 have locking elements interacting with one another, which are adapted by means of snap locking to prevent the projection 11 being accidentally dislodged from the recess 12.
• the said locking elements here take the form of interacting locking projections 13, 14 formed on the projection and in the recess respectively.
• the inner part 5 is also provided with a first bead 15 extending in a circumferential direction around its outer surface.
• the outer part is in the same way provided with a corresponding second bead 16 extending in a circumferential direction around its inner surface, this bead being adapted to snap over the bead 15 of the inner part and stay behind this when the outer part 9 is passed over the inner part 5.
• the outer part 9 has an inwardly directed flange 17, which defines to what extent the outer part 9 can be pushed on to the inner part 5.
• the first and second bead, interacting together with the flange 17, are adapted to limit the displacement of the parts relative to one another in an axial direction and thereby to ensure that inner and outer part maintain their solidarity when they are not fixed to one another by means of the projection 11 and the recess 12.
• At least one window 18 is incorporated into the outer part 9 through which a part of the inner part 5 is adapted to become visible when fixing of the inner part 15 to the outer part 9 has been accomplished.
• Fig. 2a and 2b show an alternative embodiment of a coupling device 1 , the inner part 5 of which at a second end has a fluid- tight connection 19, which is adapted to prevent a flow of fluid out through the coupling device 1 when it is fixed to the pipe end 2.
• the outer part 9 is also completely closed at its second end, since in this embodiment no opening for a flow element is required. Otherwise the coupling device according to fig. 2a and 2b has all the same characteristics as the coupling device according to fig. la and lb.
• Fig. 3a and 3b show, by means of detached views, how the respective insides of the outer parts are formed in the embodiment according to fig. la and lb and 2a and 2b respectively.
• the recess 12 formed to complement the projection 11 on the inner part, the recess also having the locking projection directed into the recess 12.
• the locking projection 13 formed on the projection 11 is adapted to be snapped over the locking projection 14 formed in the recess 12 when the projection 11 is made to engage in the recess 12 on the application of a twisting movement.
• the locking projection 13 formed on the projection 11 must then first be made to snap over the locking projection 14 of the recess before the projection 11 can be twisted out of the recess 12. This prevents the projection 11 being accidentally dislodged from the recess 12.
• the insides of the outer parts are furthermore formed in such a way that they permit a twisting movement of the inner and outer part relative to one another, in that recesses 20 with a width greater than the arms 7 are formed on the inside of the outer part.
• the window is located on the inwardly directed flange 17 formed at the second end of the outer part, so that the projection 11 will become visible through this when fixing has been accomplished.
• a window can be incorporated at any point on the outer part 9 where any part of the inner part 5 only becomes visible when the fixing has been accomplished.
• Fig. 3a shows the outer part 9 for the embodiment in which the inner part 5 has a fluid-tight connection to a flow element 10. The flow element 10 can then pass through the opening 21 defined by the flange 17.
• Fig. 3b shows the outer part for the embodiment in which the inner part 5 has a fluid-tight connection 19 at a second end. The flange 17 can then be formed so that its edges coincide, i.e. so that the second end of the outer part is entirely closed, apart from the window 18.
• Fig. 4 shows the coupling device 1 according to the invention as in fig.
• Fig. 5 shows a partial section through the coupling device according to the invention in fig. 2a and 2b fixed on a pipe end 2.
• the section shows how the essentially tubular outer part 9 from a first end is passed over the inner part 5 from its second end, thereby pressing the spring arms 7 radially inwards into an essentially axial orientation in which the hooks 8 have been made to engage behind the radially projecting flange 3.
• a part of the inner part 5 has been rendered visible through a window 18 incorporated in the outer part 9 in that the rear section of an arm has been twisted in front of this.
• the inner and outer parts may, for example, be adapted to be fixed to one another by means of threads or bayonet fitting.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20405027

Family Applications (1)

Country Status (2)

Cited By (6)

Citations (5)

• 1996
  • 1996-12-18 SE SE9604660A patent/SE507597C2/sv not_active IP Right Cessation
• 1997
  • 1997-12-15 WO PCT/SE1997/002095 patent/WO1998029680A1/en active Application Filing

Patent Citations (5)

Also Published As

Similar Documents

Legal Events