Pipe joints or couplings – With assembly means or feature
Patent
1996-02-08
1997-08-19
Nicholson, Eric K.
Pipe joints or couplings
With assembly means or feature
285315, F16L 3718
Patent
active
056580185
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a system for establishing a sealing connection in a pipe conduit between first and second axially impacting joint components.
The present invention is a further development of a system as illustrated in Norwegian Patent 167 474, in which a sealing ring is employed of elastically yielding metal (steel) for transmitting extraordinarily high loads on the sealing ring. In practical constructions of the present invention it is appropriate, but not a necessity, that the sealing ring is correspondingly as defined in this publication.
In known systems of the kind indicated by way of introduction the joint components, and especially the joint component which carries a tensioning means, are necessarily designed with a relatively large outer diameter. Generally, there is a need for joint components which occupy minimal space reckoned in the radial direction, but the need is particularly so when the system is used at locations where available space is rather limited, especially internally in the pipe conduits or in similar conveyors.
The invention is particularly directed to a sealing connection system between two joint components. In this respect, the pipe joint sealing connection system includes an elastically yielding sealing ring, preferably a metal sealing ring, of substantially wedge-shaped cross-section which is received in a groove located between opposite impact surfaces and an innermost surface of the joint components. The sealing connection system also includes an annular series of rotatable tension means which are rotatable about a respective axis in the first joint component between an inactive position and an active locking position wherein the joint components are mutually locked. The tension means are adapted to exert an axial prestressing force between the two axially impacting joint components via the sealing ring and the radial impact surfaces. The sealing system further includes an actuating means for each tension means, for example,. a slide which is movable in the first joint component and which is adapted for adjustment of the tension means between the inactive position and active position. Each tension means is provided on one side with a tension portion which cooperates with a stop in the second joint component and on the opposite side with a back surface which cooperates with the actuating means.
According to the invention the objective first and foremost is a system in which the joint components, especially the tension means-carrying joint component, can be designed with a minimal radial dimension, but also preferably with a minimal axial dimension. The particular aim is to arrive at a solution where the tension portion of the tension means can be moved within a relatively constricted work zone. In other words, the aim is a system having a particularly suitable tension means, which has a simple and solid construction and which in addition has a reliable and effective mode of operation.
By using pivotable tension means such as levers or fingers, as known per sea more compact construction may be arrived at.
GB-A-1 362 093 is illustrates a conduit connector, wherein a first connector member is provided with a plurality of pivotally mounted levers for engagement with an annular seat of a second connector member. The first connector member has an axially movable control member for common control of the pivotal movement of the levers. The control member is connected to a mechanically operated actuator by means of a set of connecting rods to provide the axial movements of the control member. Accordingly, all levers are operated by a common actuating means via a common control member, but not necessarily with the same pivotal force on each lever. This means that the load transmitted in the first connector member from the control member via the levers onto the annular seat of the second connector member may differ considerably in practice from lever to lever and may cause oblique load on the seat. During the transmission of high loads from the actuating means this may
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Framo Engineering A/S
Nicholson Eric K.
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