Triple-weld fitting

Patent metadata

Field	Value
Publication number	US-10627033-B2
Application number	US-201615255813-A
Country	US
Kind code	B2
Filing date	Sep 2, 2016
Priority date	Sep 2, 2016
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

Disclosed is a method for constructing a double walled tube assembly, comprising: welding a first axial end of a first tube to a first sub-fitting of a first fitting, sliding a second tube over the first sub-fitting and the first tube, sliding a second sub-fitting of the first fitting over the first sub-fitting such that the first and second sub-fittings are co-axial, welding a first axial end of the second tube to the second sub-fitting, and welding the second sub-fitting to the first sub-fitting. An assembly includes a first fitting that includes a first sub-fitting and a second sub-fitting, a first tube having a first axial end that is welded to the first sub-fitting, and a second tube having a first axial end that is welded to the second sub-fitting, where the first tube is nested within the second tube, where the first sub-fitting is welded to the second sub-fitting.

First claim

What is claimed is:

1. A method for constructing a double walled tube assembly, comprising:
welding a first axial end of a first tube to a first sub-fitting of a first fitting;
sliding a second tube over the first sub-fitting and the first tube;
sliding a second sub-fitting of the first fitting over the first sub-fitting such that the first and second sub-fittings are co-axial;
welding a first axial end of the second tube to the second sub-fitting; and
welding the second sub-fitting to the first sub-fitting,
wherein the second sub-fitting includes a plurality of webs projecting from an inner surface of the second sub-fitting, each web of the plurality of webs circumferentially spaced from each adjacent web of the plurality of webs, and
wherein welding the second sub-fitting to the first sub-fitting includes welding only the plurality of webs to the first sub-fitting.

2. The method of claim 1 , further comprising:
welding the first tube to a second fitting.

3. The method of claim 2 , further comprising:
welding the second tube to the second fitting.

4. The method of claim 2 , wherein the second fitting is an angled, threaded fitting.

5. The method of claim 1 , wherein the first fitting is a three-flanged fitting.

6. The method of claim 1 , wherein the second sub-fitting and the first sub-fitting are welded together at a position corresponding to an innermost surface of the second sub-fitting and an outermost surface of the first sub-fitting.

7. The method of claim 1 , wherein the plurality of webs includes three webs.

8. The method of claim 1 , wherein the webs are substantially equidistantly spaced from one another, center-to-center, and wherein each of the webs consumes approximately fifty degrees of the overall three hundred sixty degree circumference.

9. The method of claim 1 , wherein sliding a second tube over the first sub-fitting and the first tube includes radially encompassing at least a portion of each of the first sub-fitting and the first tube with the second tube.

10. The method of claim 1 , wherein sliding a second sub-fitting of the first fitting over the first sub-fitting includes radially encompassing at least a portion of the first sub-fitting with the second sub-fitting.

11. An assembly, comprising:
a first fitting that includes a first sub-fitting and a second sub-fitting;
a first tube having a first axial end that is welded to the first sub-fitting; and
a second tube having a first axial end that is welded to the second sub-fitting,
wherein the first tube is nested within the second tube,
wherein the first sub-fitting is welded to the second sub-fitting,
wherein the second sub-fitting includes a plurality of webs projecting from an inner surface of the second sub-fitting, each web of the plurality of webs circumferentially spaced from each adjacent web of the plurality of webs,
wherein the first sub-fitting is welded to the second sub-fitting only between the plurality of webs and the second sub-fitting.

12. The assembly of claim 11 , further comprising:
a second fitting,
wherein a second axial end of the first tube is welded to the second fitting, and
wherein a second axial end of the second tube is welded to the second fitting.

13. The assembly of claim 11 , further comprising:
a channel formed in the second sub-fitting coupled to the second tube and a port.

14. The assembly of claim 13 , wherein the channel and the port are configured to convey fluid that is present in a cavity between an inner diameter of the second tube and an outer diameter of the first tube.

15. The assembly of claim 13 , further comprising:
a first seal; and
a second seal located radially outward of the first seal with respect to a longitudinal axis of the assembly,
wherein the port divides the first seal and the second seal.

16. The assembly of claim 15 , wherein at least one of the first seal or the second seal is made of at least rubber.

17. The assembly of claim 11 , wherein the plurality of webs includes three webs.

18. The assembly of claim 11 , wherein the webs are substantially equidistantly spaced from one another, center-to-center, and wherein each of the webs consumes approximately fifty degrees of the overall three hundred sixty degree circumference.

Assignees

• United Technologies Corp

Inventors

• Sanchez Christopher A

Classifications

• F05D2260/98

  Lubrication · CPC title

• B23K2101/06

  Tubes · CPC title

• F16L39/005 Primary

  for concentric pipes · CPC title

• F01D25/183

  Sealing means · CPC title

• B23K31/027

  Making tubes by soldering or welding · CPC title