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A Method Of Brazing Of Flattened Formed Tubes With A Sheet Substrate In Heat Exchanger Panels
Abstract: The invention relates to a method of brazing of flattened formed tubes (3) with a sheet substrate in radiation panels, cryogenic panels, solar shields and other heat exchanger panels (5) comprising the following steps of laying of guiding rails (2) as per the required tube layout on the base plate (1), placing a packing shim (4) of suitable thickness between said guide rails (2) on base plate (4), placing said flattened formed tube (3) wrapped with fluxed brazing (filler material) foil (9) between said guide rails (2), placing a sheet substrate (5) treated with flux on the joint surface above the flattened formed tube (3) characterized by placing thermal stabilizer (8) on the sheet substrate as per tube layout between the clamp pads (6), clamping the thermal stabilizers and sheet substrate (4), with the base plate (1) using clamp pads (6) and clamps (7), heating gradually from one end focusing on the thermal stabilizer with a conventional flame torch (10) and progressively advancing from end to end to complete the brazing.
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Notices, Deadlines & Correspondence
Notices, Deadlines & Correspondence
Patent Information
Application #
Filing Date
15 March 2004
Publication Number
39/2007
Publication Type
INA
Invention Field
GENERAL ENGINEERING
Status
Email
Parent Application
Patent Number
Legal Status
Grant Date
2008-03-31
Renewal Date
Applicants
BHARAT HEAVY ELECTRICALS LIMITED
BHEL HOUSE, SIRI FORT, NEW DELHI- 110 049, INDIA
Inventors
1. VENUGOPAL RAMESH
BHEL HOUSE, SIRI FORT, NEW DELHI- 110 049, INDIA
2. ARUNACHALAM VENGOPALAN
BHEL HOUSE, SIRI FORT, NEW DELHI- 110 049, INDIA
Specification
This invention relates to the field of metal joining process. This new process is employed for joining metals without melting the parts to be joined, but with an intermediate material that melts and makes a joint, called filler material. This filler
material is usually an alloy of silver when the process is called
o o brazing (carried out at 650 C - 700 C) and when the filler
material is an alloy of lead and tin, it is called soldering,
o carried out at about 200 C).
Heat exchangers, which involve predominantly non-ferrous and dissimilar materials, often involving very thin sections and intricate configuration involve brazing. Further whenever heat is transferred through the joined contact surface, the bracing becomes a crucial process that decides the product performance and quality. Applications that involve conveying of a fluid heat source or heat sink through tubing, attached to plate surfaces for effective surface heat transfer as in radiation panels, cryogenic panels, solar shields, etc., employ tube to sheet braz ing.
Brazing of tubes to plates or "sheets is usually carried out employing a torch
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 447-del-2004-gpa.pdf | 2011-08-21 |
| 1 | 447-DEL-2004-RELEVANT DOCUMENTS [14-03-2018(online)].pdf | 2018-03-14 |
| 2 | 447-del-2004-form-3.pdf | 2011-08-21 |
| 2 | Form 27 [29-03-2017(online)].pdf | 2017-03-29 |
| 3 | Other Patent Document [22-03-2017(online)].pdf | 2017-03-22 |
| 3 | 447-del-2004-form-2.pdf | 2011-08-21 |
| 4 | 447-del-2004-Restoration Processed Case-(28-03-2013).pdf | 2013-03-28 |
| 4 | 447-del-2004-form-19.pdf | 2011-08-21 |
| 5 | 447-del-2004-Restoration Processed Case-(09-11-2012).pdf | 2012-11-09 |
| 5 | 447-del-2004-form-1.pdf | 2011-08-21 |
| 6 | 447-del-2004-Restoration Processed Case-(05-06-2012).pdf | 2012-06-05 |
| 6 | 447-del-2004-drawings.pdf | 2011-08-21 |
| 7 | 447-del-2004-description (compelete).pdf | 2011-08-21 |
| 7 | 447-DEL-2004-Correspondence Others-(02-01-2012).pdf | 2012-01-02 |
| 8 | 447-DEL-2004-Form-15-(02-01-2012).pdf | 2012-01-02 |
| 8 | 447-del-2004-correspondence-po.pdf | 2011-08-21 |
| 9 | 447-del-2004-correspondence-others.pdf | 2011-08-21 |
| 9 | 447-DEL-2004-GPA-(02-01-2012).pdf | 2012-01-02 |
| 10 | 447-del-2004-abstract.pdf | 2011-08-21 |
| 10 | 447-del-2004-claims.pdf | 2011-08-21 |
| 11 | 447-del-2004-abstract.pdf | 2011-08-21 |
| 11 | 447-del-2004-claims.pdf | 2011-08-21 |
| 12 | 447-del-2004-correspondence-others.pdf | 2011-08-21 |
| 12 | 447-DEL-2004-GPA-(02-01-2012).pdf | 2012-01-02 |
| 13 | 447-del-2004-correspondence-po.pdf | 2011-08-21 |
| 13 | 447-DEL-2004-Form-15-(02-01-2012).pdf | 2012-01-02 |
| 14 | 447-DEL-2004-Correspondence Others-(02-01-2012).pdf | 2012-01-02 |
| 14 | 447-del-2004-description (compelete).pdf | 2011-08-21 |
| 15 | 447-del-2004-drawings.pdf | 2011-08-21 |
| 15 | 447-del-2004-Restoration Processed Case-(05-06-2012).pdf | 2012-06-05 |
| 16 | 447-del-2004-form-1.pdf | 2011-08-21 |
| 16 | 447-del-2004-Restoration Processed Case-(09-11-2012).pdf | 2012-11-09 |
| 17 | 447-del-2004-form-19.pdf | 2011-08-21 |
| 17 | 447-del-2004-Restoration Processed Case-(28-03-2013).pdf | 2013-03-28 |
| 18 | Other Patent Document [22-03-2017(online)].pdf | 2017-03-22 |
| 18 | 447-del-2004-form-2.pdf | 2011-08-21 |
| 19 | Form 27 [29-03-2017(online)].pdf | 2017-03-29 |
| 19 | 447-del-2004-form-3.pdf | 2011-08-21 |
| 20 | 447-DEL-2004-RELEVANT DOCUMENTS [14-03-2018(online)].pdf | 2018-03-14 |
| 20 | 447-del-2004-gpa.pdf | 2011-08-21 |