Apparatus and method for detecting the presence of a burner flame

Abstract

An apparatus for flameout detection to be used with a furnace having a sight hole tube for inspection of a flame. The apparatus comprises a fixed portion adapted for being mounted to the sight hole tube and being electrically connected to a control system. The fixed portion defines a first see-through channel being positioned opposite a sight hole of the sight hole tube, whereby the flame is visible therethrough. A detachable portion has a sensor device disposed therein a second see-through channel. The detachable portion is releasably mounted to the fixed portion such as to engage a contact connection therewith. The sensor device is disposed opposite the first see-through channel of the fixed portion for flameout detection therethrough, wherein the detachable portion is electrically disconnected upon being detached from the fixed portion. A conduit is provided in the fixed portion for injecting air in the sight hole of the furnace, thereby protecting the apparatus from furnace heat exposure through the sight hole. The first see-through channel of the fixed portion and the second see-through channel of the detachable portion are superposed such that the flame is visible through the apparatus.

Dependencies are inferred from the claim text.