The subject matter disclosed herein relates generally to transformers, and, more particularly, to a rupture resistant system for transformers that is capable of creating additional volume under increased pressure conditions to mitigate hazards.
Transformer failures result in sudden generation of gases, which increase the pressure inside the transformer tank. Catastrophic rupture of a transformer can occur when the pressure generated by the gases exceeds the transformer's rupture pressure. Such ruptures may result in releasing gases and liquids, which can pose a hazard to the surroundings and pollute the environment.
It would therefore be desirable to better contain the gases and liquids.
In various embodiments disclosed herein, gas containment capabilities are improved by creating volume in the transformer, increasing the rupture pressure of the transformer, or combinations thereof.
More specifically, in accordance with one embodiment disclosed herein, a rupture resistant system comprises a tank comprising a top member, a sidewall member, and a bottom member, and a component situated within the tank and susceptible to creating increasing pressure within the tank when under a fault condition. At least one of the top, sidewall, and bottom members is connected to another of the top, sidewall, and bottom members in a manner so as to cause an increase in inner volume of the tank under increased pressure conditions.
In accordance with another embodiment disclosed herein, a rupture resistant system comprises a tank, a radiator, a header pipe connecting the tank to the radiator, and a component situated within the tank and susceptible to creating increasing pressure within the system when under a fault condition. The radiator is configured to increase an inner volume under increased pressure conditions.
In accordance with another embodiment disclosed herein, a transformer system comprises a transformer tank housing a transformer, a radiator, and a header pipe connecting the radiator and the transformer tank. The transformer tank comprises a top member, a sidewall member, and a bottom member, which are connected so as to enable increase in inner volume of the transformer tank under increased pressure conditions. The radiator is also configured to increase an inner volume under increased pressure conditions.
These and other features, aspects, and advantages of the present invention will become better understood when the following detailed description is read with reference to the accompanying drawings in which like characters represent like parts throughout the drawings, wherein:
Embodiments disclosed herein include rupture resistant systems. In one embodiment, a rupture resistant system comprises a tank comprising a top member, a sidewall member, and a bottom member and a component situated within the tank and susceptible to creating increasing pressure within the tank when under a fault condition. At least one of the top, sidewall, and bottom members is connected to another of the top, sidewall, and bottom members in a manner so as to cause an increase in inner volume of the tank under increased pressure conditions. In another embodiment, a rupture resistant system comprises a tank, a radiator, and a header pipe connecting the tank to the radiator. The radiator is configured to increase an inner volume under increased pressure conditions. In still another embodiment, the above two embodiments are combined. More specific aspects of these embodiments are described below for purposes of example. Although transformer embodiments are described for purposes of example, the embodiments described herein are useful for systems wherein undesired pressures may occur in a tank and/or radiator. As used herein, singular forms such as “a,” “an,” and “the” include single and plural referents unless the context clearly dictates otherwise. For example, although a plurality of sidewall members are typically used, in some embodiments, a single side member may be used. Furthermore, the members need not be discrete such that, in some embodiments, a common sheet may be bent to serve as multiple members. The sheet may comprise materials such as, for example, steel, metal alloys, aluminum, and corrosion resistant materials such as polymers and thermoplastics.
Radiator 14 may be connected to tank 12 by header pipes 28. Header pipes 28 have diameters that are larger than conventional header pipe diameters and are sized to permit sufficient flow of gas from the transformer tank to the radiator under increased pressure conditions. Under normal operating conditions, increased header pipe diameters may reduce thermal performance. In one embodiment, header pipes 28 are provided with flow restrictors 30 to control flow from tank 12 to radiator 14. Flow restrictors 30 are configured to be displaced under increased pressure conditions to increase flow from tank 12 to radiator 14. In one example, the header pipes have diameters ranging from six inches to ten inches and having cross sections of four inches when flow restrictors 30 are in place to control flow. In another embodiment, the sum of the cross-sectional areas of the header pipes is adjusted by additionally or alternatively adjusting a number of header pipes. Flow restrictors may optionally be used in this embodiment as well.
Radiator 14 comprises an inner panel 32 and an outer panel 34 connected to the inner panel with inner panel 32 being coupled to header pipes 28. Inner panel 32 and outer panel 34 flex outward to increase inner volume of radiator 14 under increased pressure conditions. In one embodiment, inner panel 32 and outer panel 34 are connected by a circumferential joint 36 that is strong enough to retain connection between the inner and outer panel when the inner panel 32 and the outer panel 34 flex outward. The circumferential joint 36 comprises a joint connecting the peripheries of the inner and outer panels. Spacers 38 may be attached between the inner and outer panels to maintain inner panel 32 and outer panel 34 in a spaced apart relationship.
The embodiments of
The connections as described referring to
In another embodiment as shown in
While only certain features of the invention have been illustrated and described herein, many modifications and changes will occur to those skilled in the art. It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the invention.
This application is a divisional of U.S. patent application Ser. No. 14/247,055, entitled “Rupture Resistant System,” filed on Apr. 7, 2014, which is a continuation of U.S. patent application Ser. No. 12/212,050, now U.S. Pat. No. 8,710,946, entitled “Rupture Resistant System,” filed on Sep. 17, 2008, which are herein incorporated by reference in their entireties.
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3634798 | Astleford, Jr. | Jan 1972 | A |
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1971624 | Nov 1967 | DE |
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Number | Date | Country | |
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20170271069 A1 | Sep 2017 | US |
Number | Date | Country | |
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Parent | 14247055 | Apr 2014 | US |
Child | 15612115 | US |
Number | Date | Country | |
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Parent | 12212050 | Sep 2008 | US |
Child | 14247055 | US |