Sealing ring for container

Abstract

A high pressure vessel sealing ring formed by an annular body made up of at least two parts, a polymer gasket and a sealing gasket, wherein the ring is in contact with the surface of a high pressure lid and with the surface of a vessel and includes at least a first part coupled by means of a mechanical stop to a second part which is concentric to the first part, where the radius of the second part is of the same or different size with respect to the radius of the first part.

Claims

1. A vessel sealing ring for vessels subjected to high pressure comprising an annular body, a polymer gasket and a sealing gasket, wherein the annular body is in contact with a surface of a high pressure lid and with a surface of a high pressure vessel, and wherein said annular body comprises at least a first part and a second part which are concentric and coupled to one another by means of a mechanical stop, wherein a radius of the second part and a radius of the first part are a same or different size, wherein the first part of the annular body is an outer ring which is in contact with the vessel surface and with the lid surface, wherein the second part of the annular body is an inner ring which is in contact with the lid surface, wherein the high pressure exerted on the sealing ring produces stresses which expand the annular body, such that gaps between the annular body and the vessel surface and lid surface are closed, preventing both the polymer gasket and the sealing gasket from extruding, wherein the first part and the second part of the annular body are made with materials having different properties for increasing the fatigue life and reducing the damage from erosion and scratching, wherein the first part and the second part are expandable due to stresses produced by a pressure exerted on the sealing ring, wherein the first part and the second part of the annular body are made of a metal with a mechanical strength between 550 MPa and 2000 MPa, wherein the first part and the second part of the annular body are made of a metal with a Young's modulus having a value less than 13500 MPa, wherein the second part of the annular body is made of a metal having a high fracture toughness, and wherein the first part of the annular body is made of a metal having a low coefficient of friction with the material of the vessel.

2. The vessel sealing ring according to claim 1, wherein the first part is divided by means of a cut, such that the first part can be expanded without the second part generating circumferential stresses on said first part.

3. The vessel sealing ring according to claim 1, wherein the first part and the second part are banded together.

4. The vessel sealing ring according to claim 3, wherein while the first part and the second part of the annular body are banded together, residual stresses have been introduced in said first part to increase fatigue life.

5. The vessel sealing ring according to claim 1, wherein a cut made on the first part is a diagonal plane with respect to the radius of the first part of the annular body.

6. The vessel sealing ring according to claim 1, wherein the mechanical stop is bevel shaped.

7. The vessel sealing ring according to claim 1, wherein the polymer gasket is in contact with the vessel surface and with a portion of the annular body.

8. The vessel sealing ring according to claim 1, wherein the sealing gasket is embedded between a portion of the second part of the annular body and a portion of the high pressure lid.

9. The vessel sealing ring according to claim 1, wherein the shape of the first part of the annular body allows fitting the annular body between the lid and the vessel by means of a protuberance extending around the entire perimeter of the ring.

10. The vessel sealing ring according to claim 1, wherein the cross section of the second part of the annular body is cross shaped.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) To complement the description that is being made and for the purpose of aiding to better understand the features of the invention according to a preferred practical embodiment thereof, a set of drawings is attached as an integral part of said description in which the following has been depicted with an illustrative and non-limiting character:

(2) FIG. 1 shows a schematic cross-section view of all the assembled elements of the vessel sealing ring proposed by the invention located inside the vessel for sealing the closure.

(3) FIG. 2 shows a perspective view of the first part of the annular body, in which the diagonal cut which has been made to release the stresses can be seen. This figure shows the cut in section A-A the detail of which is observed in the following figure.

(4) FIG. 3 shows a view of the section A-A of the annular body of FIG. 2.

DETAILED DESCRIPTION

(5) In view of the described drawings, how the annular body of the vessel sealing ring comprises a first part (1) and a second part (2) which are preferably an outer ring and an inner ring, concentric and coupled to one another by means of a bevel-shaped mechanical stop (7) which is responsible for preventing the separation of said inner and outer rings can be observed in one of the possible embodiments of the invention.

(6) The inner ring has a protuberance (10) extending around its entire perimeter for the purpose of enabling fitting in the high pressure lid, and one of the sides has a smooth vertical wall adapted to locate a polymer gasket (3) assuring the sealing between the outer ring and the vessel (6), as can be seen in FIG. 1.

(7) The inner ring which is preferably manufactured from titanium alloy and preferably has a cross-shaped section of which an elevated portion rests on the outer ring and another elevated portion rests on the high pressure lid surface (9) such that it is extended generating a groove around the entire perimeter together with the high pressure lid surface (9), where a sealing gasket (4) which is responsible for sealing the gap is located between the inner ring and the high pressure lid (5), as can be seen in FIG. 1.

(8) The outer ring of this embodiment is preferably manufactured from a copper alloy and it is divided by means of one narrowest possible controlled cut (11) with a specific angle, preferably of 45, which allows the outer ring to be closed completely when it is not subjected to pressure, and the gasket to open when the diameter increases as the vessel is pressurized, thus maintaining a controlled and small enough gap so that the polymer gasket does not extrude, as can be seen in FIG. 2.

(9) The cross-section of the first part (1) of the annular body of the sealing ring is observed in FIG. 3, where the protuberance (10) extending around its entire perimeter is shown for the purpose of enabling fitting in the high pressure lid (5), as shown in FIG. 1.

(10) In view of this description and set of drawings, the person skilled in the art will understand that the embodiments of the invention which have been described can be combined in many ways. The invention has been described according to several preferred embodiments thereof, but for the person skilled in the art it will be evident that multiple variations can be introduced in said preferred embodiments.