Metal working – Method of mechanical manufacture – Heat exchanger or boiler making
Patent
1990-08-27
1991-07-23
Cuda, Irene
Metal working
Method of mechanical manufacture
Heat exchanger or boiler making
29890033, 29407, 29523, 73 495, 73112, B23P 1526
Patent
active
050331906
ABSTRACT:
A method for controlling, in the manufacture of plate fin and tube heat exchangers, the operation of a tube expander of the type that does not expand all hairpin tubes in a heat exchanger simultaneously so that the two legs of each hairpin tube are expanded at the same time. In a preferred embodiment, a supply of pressurized air is directed through one of a selected group of open ended tube legs. Pressure sensors located at the ends other legs within the group detect the tube, if any, at which there an increase in pressure, establishing continuity between that leg and the first leg and thus identifying the two legs under test as parts of the same hairpin. This matched pair of legs is identified for expansion on the same expansion stroke of the expander. Other legs within the group between which there is pressure continuity are similarly detected and identified. Other groups of legs are similarly and progressively selected and matched pairs identified until all matched pairs in the heat exchanger have been identified and expanded.
REFERENCES:
patent: 4120095 (1978-10-01), Lobourg
patent: 4372025 (1983-02-01), Behle
patent: 4625396 (1986-12-01), Ahmed et al.
patent: 4745678 (1988-05-01), Gray
patent: 4766667 (1988-08-01), Gray
patent: 4839950 (1989-06-01), Stroup
patent: 4858296 (1989-08-01), Gray
patent: 4858305 (1989-08-01), Gray et al.
patent: 4889679 (1989-12-01), Snyder et al.
Carrier Corporation
Cuda Irene
LandOfFree
Method for controlling a tube expander does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for controlling a tube expander, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for controlling a tube expander will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-424531