Connection joint for pipes to convey gas, compressed air and other fluids

Patent metadata

Field	Value
Publication number	US-9964242-B2
Application number	US-201514729888-A
Country	US
Kind code	B2
Filing date	Jun 3, 2015
Priority date	Jun 3, 2014
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

A fluid connection joint to couple tubular pipes intended to convey gas, compressed air and other fluids. The fluid connection joint includes a deformable internal ring having sealing surfaces internally to engage with an outer surface of a first tubular element and frontally to engage with a second tubular element. The deformable internal ring is located within a housing that is coupled to a flange of the second tubular element by fixing screws. The tightening of the fixing screws results in a substantially radial compression of the internal ring and seals around the first tubular element and a second substantially axial compression of the frontal seal against the flange.

First claim

The invention claimed is:

1. A connection joint for a first tubular element and a second tubular element provided with a flange, the tubular elements being suitable for the transport of fluids, wherein the connection joint comprises:
a deformable internal ring provided internally and frontally with seal seats;
a plurality of seals seated in the seats of the internal ring, wherein at least one internal seal of the plurality of seals is configured to be placed around and compressed against the first tubular element when the first tubular element is inserted into the connection joint, and wherein a frontal annular seal of the plurality of seals is compressed against the second tubular element, when the second tubular element is connected to said first tubular element through the joint;
an external housing in which said deformable internal ring is housed and which is provided with a flange having fixing screws configured to engage in said flange of the second tubular element;
a seaming ring configured to prevent the extraction of the first tubular element, when inserted into the connection joint;
wherein the inner diameters of said internal ring and of said at least one internal seal is greater than the outer diameter of said first tubular element so that said first tubular element is freely insertable inside said external housing, said internal ring and said at least one internal seal and wherein said fixing screws of the external housing are configured to be tightened on said flange of said second tubular element, resulting in a pressure of the external housing on the internal ring, so as to determine a substantially radial compression of the internal ring and of the at least one internal seal around the first tubular element and a substantially axial compression of the frontal seal against said flange of the second tubular element; and
a pushing ring positioned between the seaming ring and the internal ring and engaged within the internal seal seat.

2. The joint according to claim 1 , wherein said seaming ring comprises at least an internal annular element configured to clutch to said first tubular element, the inner diameter of said internal annular element being initially greater than the outer diameter of said first tubular element and said internal annular element being configured to penetrate into a lateral wall of said first tubular element because of the tightening of the external terminal housing.

3. The joint according to claim 1 , wherein said internal ring comprises a final annular step to stop said first tubular element.

4. The joint according to claim 1 , wherein the outer walls of said internal ring and of said seaming ring are directly in contact with the internal wall of the external housing.

5. The joint according to claim 1 , wherein said internal ring has a frustoconical inner section that tends to enlarge towards the side of insertion of said first tubular element.

6. The joint according to claim 1 , wherein said external housing comprises a first cylindrical sleeve for the insertion of the first tubular element and a central part having a frustoconical section which tends to enlarge towards the side of housing of said internal ring.

7. The joint according to claim 1 , further comprising one or more security rings positioned on at least a screw that engages between the flange of the second tubular element and the flange of the external housing.

8. The joint according to claim 1 , wherein said deformable ring, said pushing ring and said seaming ring have a frustoconical outer surface leaning against the frustoconical inner wall, of the external housing.

Assignees

• Ingersoll Rand Co

Inventors

• Dell'Acqua Mauro
• Di Giusto Eros

Classifications

• F16L2201/20

  Safety or protective couplings · CPC title

• F16L23/02

  the flanges being connected by members tensioned axially (F16L23/12 takes precedence) · CPC title

• F16L23/024 Primary

  characterised by how the flanges are joined to, or form an extension of, the pipes · CPC title

• F16L19/10

  the profile of the ring being altered · CPC title

• F16L19/0218

  comprising only sealing rings · CPC title