Apparatus and method of aligning and securing components of a liquid cooled plasma arc torch and improved torch design

Patent metadata

Field	Value
Publication number	US-9313871-B2
Application number	US-201514631814-A
Country	US
Kind code	B2
Filing date	Feb 25, 2015
Priority date	Jul 31, 2013
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

A plasma arc torch includes a cathode adaptor body having at least two sealant channels with sealant rings. The torch also includes a cathode body having at least two sealant channels with sealant rings. The torch further includes a pilot arc connector having at least two sealant channels with sealant rings. The torch additionally includes a rear isolator that includes at least two sealant channels with sealant rings that engage an anode body and are spaced apart from each other by a distance that is in a range of 2 percent to 50 percent of an overall length of the rear isolator. The rear isolator also includes at least two sealant channels with sealant rings that engage a ring isolator and are spaced apart from each other by a distance that is in a range of 2 percent to 50 percent of the overall length of the rear isolator.

First claim

What is claimed is:

1. A plasma arc torch, comprising:
a cathode adaptor body having at least two first sealant channels formed on an outer surface of a first end of the cathode adaptor body to respectively accept at least two first sealant rings, the at least two first sealant channels are spaced apart from each other by a first distance that is in a range of 2 percent to 90 percent of an overall length of the cathode adaptor body;
a cathode body coupled to a second end of the cathode adaptor body, the cathode body having at least two second sealant channels formed on an outer surface of the cathode body to respectively accept at least two second sealant rings, the at least two second sealant channels are spaced apart from each other by a second distance that is in a range of 2 percent to 50 percent of an overall length of the cathode body;
a pilot arc connector having at least two third sealant channels formed on an outer surface of the pilot arc connector to respectively accept at least two third sealant rings, the at least two third sealant channels are spaced apart from each other by a third distance that is in a range of 2 percent to 90 percent of an overall length of the pilot arc connector; and
a rear isolator that isolates the cathode body from an anode body, the rear isolator having
at least two fourth sealant channels formed on an outer surface of the rear isolator to respectively accept at least two fourth sealant rings, the at least two fourth sealant rings engaging with an inner surface of the anode body and the at least two fourth sealant channels are spaced apart from each other by a fourth distance that is in a range of 2 percent to 50 percent of an overall length of the rear isolator, and
at least two fifth sealant channels formed on the outer surface of the rear isolator to respectively accept at least two fifth sealant rings, the at least two fifth sealant rings engaging with an inner surface of a ring isolator and the at least two fifth sealant channels are spaced apart from each other by a fifth distance that is in a range of 2 percent to 50 percent of the overall length of the rear isolator.

2. The plasma arc torch of claim 1 , wherein the first distance is in a range of 2 percent to 25 percent of the overall length of the cathode adaptor body.

3. The plasma arc torch of claim 1 , wherein the at least two first sealant rings are O-rings.

4. The plasma arc torch of claim 1 , wherein the at least two first sealant rings have at least one of same dimensions and same compositions.

5. The plasma arc torch of claim 1 , wherein the at least two first sealant rings have at least one of different dimensions and different compositions.

6. The plasma arc torch of claim 1 , wherein the first end of the cathode adaptor body is opposite the second end of the cathode adaptor body in a direction of flow of a cooling fluid.

7. The plasma arc torch of claim 1 , wherein the second distance is in a range of 2 percent to 12 percent of the overall length of the cathode adaptor body.

8. The plasma arc torch of claim 1 , wherein the at least two second sealant rings are O-rings.

9. The plasma arc torch of claim 1 , wherein the at least two second sealant rings have at least one of same dimensions and same compositions.

10. The plasma arc torch of claim 1 , wherein the at least two second sealant rings have at least one of different dimensions and different compositions.

11. The plasma arc torch of claim 1 , wherein a distance between a center of the second distance a center of the overall length of the cathode body is no more than 10 percent of the overall length of cathode body.

12. The plasma arc torch of claim 1 , wherein the third distance is in a range of 2 percent to 50 percent of the overall length of the pilot arc connector.

13. The plasma arc torch of claim 1 , wherein the at least two third sealant rings are O-rings.

14. The plasma arc torch of claim 1 , wherein the at least two third sealant rings have at least one of same dimensions and same compositions.

15. The plasma arc torch of claim 1 , wherein the at least two third sealant rings have at least one of different dimensions and different compositions.

16. The plasma arc torch of claim 1 , wherein a distance between a center of the third distance a center of the overall length of the pilot arc connector is no more than 20 percent of the overall length of pilot arc connector.

17. The plasma arc torch of claim 1 , wherein the fourth distance is in a range of 2 percent to 16 percent of the overall length of the rear isolator.

18. The plasma arc torch of claim 1 , wherein the fifth distance is in a range of 2 percent to 16 percent of the overall length of the rear isolator.

19. The plasma arc torch of claim 1 , wherein the fourth distance equals the fifth distance.

20. The plasma arc torch of claim 1 , wherein the fourth distance does not equal the fifth distance.

21. The plasma arc torch of claim 1 , wherein the at least two fourth sealant rings are O-rings and the at least two fifth sealant rings are O-rings.

Assignees

• Lincoln Global Inc

Inventors

• Namburu Praveen K
• Winn Jackie L

Classifications

• H05H1/34

  Details, e.g. electrodes, nozzles · CPC title

• B23K10/00

  Welding or cutting by means of a plasma · CPC title

• B23K9/285

  Cooled electrode holders · CPC title

• H05H2001/3478

  Electricity · mapped topic

• H05H1/28 Primary

  Cooling arrangements · CPC title