Pipe joints or couplings – Packed – Flanged pipe
Patent
1985-11-26
1987-04-28
Scanlan, Jr., Richard J.
Pipe joints or couplings
Packed
Flanged pipe
285351, 285407, 285409, 285331, F16L 2304
Patent
active
046608699
DESCRIPTION:
BRIEF SUMMARY
Pipe connections are known comprising two tubular pieces each intended to be mounted on the end of a pipe and each providing a flange, each flange providing a conical slope on the side of the respective pipe, the connection comprising a clamp collar having a generally V-shaped groove intended to cover the flanges and to press the flanges against each other by engagement on their conical slopes.
The aim of the invention is to improve the reliability of connections of this type and to enable the achievement of perfect sealing both for liquids and for gases within a wide range of temperatures and of pressure or low pressure.
The connection forming the object of the invention is characterised in that one flange displays on its side facing the other flange an annular groove in which a gasket is fitted with play, this flange having an annular area of support the average radius of which is smaller than that of the groove, this area of support being formed to engage against another area of support of the other flange.
The attached drawing shows diagrammatically and as an example one form of operation of the object of the invention.
FIG. 1 is a view in axial section of the two tubular parts of the connection, in a connected position.
FIG. 2 shows a sectional view of one of the tubular pieces, in a disconnected position.
FIG. 3 is an end view of the connection fitted with its clamp collar.
With reference to FIG. 1, the connection consists of two tubular pieces 1 and 2 each displaying a flange 3 and 4 respectively. Each of the tubular pieces is intended to be welded to (secured together with) the end of a pipe. Where the liquid passing through the link is a food substance or is a corrosive liquid, the pipes are generally made of stainless steel and it is obviously worth while forming the pieces 1 and 2 of this material as well. Each flange 3 and 4 has a conical slope, 5 and 6 respectively, at the side of the pipe to which it is attached.
The assembly of the two tubular pieces of the connection is ensured by a clamp collar 7, made up of two jaws 8 and 9 in a sheet of drop forged stainless steel. These jaws are articulated to each other by means of a connecting rod 10 connected with lugs which are welded (bound) to the jaws or are integral with the jaws. At their other end, these jaws are held tight with the help of a lever 11 fixed to the end of a connecting rod 12 which has a connecton 13 on the jaw 8, this lever 11 turning a cam-shaped section 14, so as to apply pressure to the end of the jaw 9 and bring the latter close to the jaw 8. The closed position of the lever 11 is retained by a spring clip 15.
The two jaws 8 and 9 each have a generally V-shaped groove 16 and are intended to cover the flanges 3 and 4 in order to hold them tightly against each other by engaging on their conical slopes 5 and 6 respectively.
As FIG. 2 shows, the tubular piece 1 has an annular support area 17 and an annular groove 18 in which a gasket 19 is fitted with play, the thickness of the gasket being less than the depth of the groove. Depending on the circumstances this gasket will be in metal, in conglomerate fibres or in elastomer.
The front face of the flange 4 displays an annular support area 20 which coacts with the joint 19, and a support area 21 engaging the surface 17. When in the state of not being held tightly it is necessary for sufficient play between the gasket 19 and the groove 18 to be provided so that when being held tightly the gasket can be bent elastically to enable close contact between the surfaces 17 and 21 and to ensure air- and watertightness.
The flange 3 presents an edge 22 surrounding the gasket 19 and the support area 17, this edge being intended to guide with play the front part 23 of the other flange when the two flanges of the connection are brought together. This part 23 has a periphery 24 shaped like a cone in order to facilitate its insertion into the spaced defined by the edge 22 and to ensure the centering of the two annular pieces.
The support area 17 is small so that clamping by the clamp collar 7 en
REFERENCES:
patent: 2330864 (1943-10-01), Bruno
patent: 2463196 (1949-03-01), Parker
patent: 2818282 (1957-12-01), Herman
patent: 3214202 (1965-10-01), Maychark
patent: 3966240 (1976-06-01), Michitoshi
"Rapidly Detatchable Joint for Main Liquid Nitrogen Lines", B. M. Kaporowski et al., Instruments & Experimental Techniques, vol. 14, Jul. 1971, p. 300.
O'Brien Anthony A.
Scanlan, Jr. Richard J.
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