Cooling radiator for fluid cooled power transformers and the like

Claim 2

A radiator for a tank which includes a wall with an opening therein and which is adapted to enclose a transformer or the like submerged in a cooling fluid, comprising: a plurality of parallel-sided, rectangular open-ended tubes in parallel relation and with spaces between said tubes communicating with the tank interior for providing passages for said cooling fluid; a shroud surrounding said tubes and spaced therefrom to provide a flow passage for said cooling fluid, said shroud forming a closure for sealing said opening of said wall of said tank, said tubes being arranged in a linear row; means at the opposite ends of said shroud and tubes sealing said cooling fluid passages comprising laterally outwardly bent portions at the ends of said tubes with said bent end portions being in abutting relation along the edges and welded thereto to seal said cooling fluid passages between said tubes, and inwardly bent portions at the ends of said shroud adjacent the tube ends being in abutting engagement with the outwardly bent portions of adjacent tube sides and welded thereto to seal the cooling fluid passage between the tubes and shroud, and; first bar means secured to one side of said tubes for fixing the tubes in spaced relationship whereby said shroud, tubes and first bar means are joined to provide said closure.

Claim 3

A radiator according to claim 1, wherein said first bar means is secured to said outward end sides of said tubes and further including second bar means secured to said inward end sides of said tubes.

Claim 4

The combination according to claim 1, said outwardly bent tube ends and inwardly bent shroud ends being perpendicular to the tube axes.

Claim 5

In a construction for reducing the oil volume and supplementing the cooling of a transformer tank of the type having terminals on the front wall of the tank and a core and coil assembly occupying a portion of the tank volume; a plurality of vertically disposed air cooling tubes within the confines of the transformer walls, the tops and bottoms of said tubes being opened and accessible to ambient air flowing upwardly therethrough for cooling purposes; the facing walls of juxtaposed tubes being spaced to permit oil flow therethrough, said tubes being located in at least some of the spaces within the transformer tank not occupied by said terminals and coil assembly, means sealing the tops and bottoms of adjacent tubes to each other, means sealing the tops and bottoms of those tubes adjacent the transformer tank walls to said walls, whereby the oil circulating in the spaces between said tubes and between the tubes and tank walls will be retained, at least the end portions of said tubes having rectangular cross-sectional shapes, said means for sealing the tops and bottoms of adjacent tubes to each other comprising outwardly bent flanges at the tops of alternate tubes and outwardly bent flanges at the bottoms of the tubes between said alternate tubes, means attaching each flange to the wall of the adjacent tube, and sealing spacers between the unflanged edges of the tubes and the adjacent portions of transformer walls.

Claim 6

In a construction for reducing the oil volume and supplementing the cooling of a transformer tank of the type having terminals on the front wall of the tank and a core and coil assembly occupying a portion of the tank volume; a plurality of vertically disposed air cooling tubes within the confines of the transformer walls, the tops and bottoms of said tubes being opened and accessible to ambient air flowing upwardly therethrough for cooling purposes; the facing walls of juxtaposed tubes being spaced to permit oil flow therethrough, said tubes being located in at least some of the spaces within the transformer tank not occupied by said terminals and coil assembly, means sealing the tops and bottoms of adjacent tubes to each other, means sealing the tops and bottoms of those tubes adjacent the transformer tank walls to said walls, whereby the oil circulating in the spaces between said tubes and between the tubes and tank walls will be retained, at least the end portions of said tubes having rectangular cross-sectional shapes, said means for sealing the tops and bottoms of adjacent tubes to each other comprising outwardly bent flanges at the tops of alternate tubes and outwardly bent flanges at the bottoms of the tubes between said alternate tubes, means attaching each flange to the wall of the adjacent tube, and sealing spacers between the unflanged edges of the tubes and the adjacent portions of transformer walls.

Claim 7

In a construction for reducing the oil volume and supplementing the cooling of a transformer tank of the type having terminals on the front wall of the tank and a core and coil assembly occupying a portion of the tank volume; a plurality of vertically disposed air cooling tubes within the confines of the transformer walls, the tops and bottoms of said tubes being opened and accessible to ambient air flowing upwardly therethrough for cooling purposes; the facing walls of juxtaposed tubes being spaced to permit oil flow therethrough, said tubes being located in at least some of the spaces within the transformer tank not occupied by said terminals and coil assembly, means sealing the tops and bottoms of adjacent tubes to each other, means sealing the tops and bottoms of those tubes adjacent the transformer tank walls to said walls, whereby the oil circulating in the spaces between said tubes and between the tubes and tank walls will be retained, at least the end portions of said tubes having rectangular cross-sectional shapes, said means for sealing the tops and bottoms of adjacent tubes to each other comprising outwardly bent flanges at the tops of alternate tubes and outwardly bent flanges at the bottoms of the tubes between said alternate tubes, means attaching each flange to the wall of the adjacent tube, and filler slugs closing the spaces between flanges at the corners of said adjacent tubes, each filler slug comprising a generally rectangular member having a self-centering indentation, said member overlapping the adjacent tube flanges.

Claim 8

In a construction for reducing the oil volume and supplementing the cooling of a transformer tank of the type having terminals on the front wall of the tank and a core and coil assembly occupying a portion of the tank volume; a plurality of vertically disposed air cooling tubes within the confines of the transformer walls, the tops and bottoms of said tubes being opened and accessible to ambient air flowing upwardly therethrough for cooling purposes; the facing walls of juxtaposed tubes being spaced to permit oil flow therethrough, said tubes being located in at least some of the spaces within the transformer tank not occupied by said terminals and coil assembly, means sealing the tops and bottoms of adjacent tubes to each other, means sealing the tops and bottoms of those tubes adjacent the transformer tank walls to said walls, whereby the oil circulating in the spaces between said tubes and between the tubes and tank walls will be retained, at least the end portions of said tubes having rectangular cross-sectional shapes, said means for sealing the tops and bottoms of adjacent tubes to each other comprising outwardly bent flanges at the tops of alternate tubes and outwardly bent flanges at the bottoms of the tubes between said alternate tubes, means attaching each flange to the wall of the adjacent tube, and filler slugs closing the spaces between flanges at the corners of said adjacent tubes, each filler slug comprising a generally rectangular member having a self-centering indentation, said member overlapping the adjacent tube flanges.

Claim 9

The combination according to claim 5, the corners of said filler slug member being removed so as to be in non-interfering relation with the adjacent tubes.

Claim 10

In a construction for reducing the oil volume and supplementing the cooling of a transformer tank of the type having terminals on the front wall of the tank and a core and coil assembly occupying a portion of the tank volume; a plurality of vertically disposed air cooling tubes within the confines of the transformer walls, the tops and bottoms of said tubes being opened and accessible to ambient air flowing upwardly theretrhough for cooling purposes; the facing walls of juxtaposed tubes being spaced to permit oil flow therethrough, said tubes being located in at least some of the spaces within the transformer tank not occupied by said terminals and coil assembly, means sealing the tops and bottoms of adjacent tubes to each other, means sealing the tops and bottoms of those tubes adjacent the transformer tank walls to said walls, whereby the oil circulating in the spaces between said tubes and between the tubes and tank wallS will be retained, at least the end portions of said tubes having rectangular cross-sectional shapes, said means for sealing the tops and bottoms of adjacent tubes to each other comprising outwardly bent flanges at the tops of alternate tubes and outwardly bent flanges at the bottoms of the tubes between said alternate tubes, means attaching each flange to the wall of the adjacent tube, means attaching each flange to the wall of the adjacent tube, each flange which abuts a wall of the adjacent tube being spaced a slight distance from its edge, said attaching means comprising a fillet weld in said space joining the flange and wall.

Claim 11

In a construction for reducing the oil volume and supplementing the cooling of a transformer tank of the type having terminals on the front wall of the tank and a core and coil assembly occupying a portion of the tank volume; a plurality of vertically disposed air cooling tubes within the confines of the transformer walls, the tops and bottoms of said tubes being opened and accessible to ambient air flowing upwardly theretrhough for cooling purposes; the facing walls of juxtaposed tubes being spaced to permit oil flow therethrough, said tubes being located in at least some of the spaces within the transformer tank not occupied by said terminals and coil assembly, means sealing the tops and bottoms of adjacent tubes to each other, means sealing the tops and bottoms of those tubes adjacent the transformer tank walls to said walls, whereby the oil circulating in the spaces between said tubes and between the tubes and tank wallS will be retained, at least the end portions of said tubes having rectangular cross-sectional shapes, said means for sealing the tops and bottoms of adjacent tubes to each other comprising outwardly bent flanges at the tops of alternate tubes and outwardly bent flanges at the bottoms of the tubes between said alternate tubes, means attaching each flange to the wall of the adjacent tube, means attaching each flange to the wall of the adjacent tube, each flange which abuts a wall of the adjacent tube being spaced a slight distance from its edge, said attaching means comprising a fillet weld in said space joining the flange and wall.