Igniter with pilot flame, particularly for gas-fired burners

An igniter with pilot flame, particularly for gas-fired burners, comprising a Venturi tube provided, at the part where a combustible mix exits, with a cap which is fitted detachably and with play on an end portion thereof, from which said cap is spaced axially, at least one hole being provided on said cap and being transverse to said end portion, for the outflow of said combustible mix, and an orientation of said cap with respect to said end portion being such that said pilot flame affects the flow of the combustible mix that exits from a flame separator of said gas-fired burner and ignites it, said Venturi tube comprising a first portion, at an end of which said cap is present, and a second portion, by means of which said Venturi tube is associated with a gas source, which is extended laterally with respect to an intermediate region of said first portion, said first portion having, on an opposite side with respect to the exit side of said combustible mix, a removable plug, wherein said cap is spaced axially from said end portion, being fitted thereon so as to rest on an underlying shoulder of said Venturi tube, creating a siphon-shaped path for the combustible mix.

An igniter with pilot flame, particularly for gas-fired burners, comprising a Venturi tube provided, at the part where a combustible mix exits, with a cap which is fitted detachably and with play on an end portion thereof, from which said cap is spaced axially, at least one hole being provided on said cap and being transverse to said end portion, for the outflow of said combustible mix, and an orientation of said cap with respect to said end portion being such that said pilot flame affects the flow of the combustible mix that exits from a flame separator of said gas-fired burner and ignites it, said Venturi tube comprising a first portion, at an end of which said cap is present, and a second portion, by means of which said Venturi tube is associated with a gas source, which is extended laterally with respect to an intermediate region of said first portion, said first portion having, on an opposite side with respect to the exit side of said combustible mix, a removable plug, provided with two of said holes, which are aligned in the same direction of extension as said end portion.

An igniter with pilot flame, particularly for gas-fired burners, comprising a Venturi tube provided, at the part where a combustible mix exits, with a cap which is fitted detachably and with play on an end portion thereof, from which said cap is spaced axially, at least one hole being provided on said cap and being transverse to said end portion, for the outflow of said combustible mix, and an orientation of said cap with respect to said end portion being such that said pilot flame affects the flow of the combustible mix that exits from a flame separator of said gas-fired burner and ignites it, said Venturi tube comprising a first portion, at an end of which said cap is present, and a second portion, by means of which said Venturi tube is associated with a gas source, which is extended laterally with respect to an intermediate region of said first portion, said first portion having, on an opposite side with respect to the exit side of said combustible mix, a removable plug, wherein said cap is provided with an element for conveying the flame toward a thermocouple which faces said at least one hole.

An igniter with pilot flame, particularly for gas-fired burners, comprising a Venturi tube provided, at the part where a combustible mix exits, with a cap which is fitted detachably and with play on an end portion thereof, from which said cap is spaced axially, at least one hole being provided on said cap and being transverse to said end portion, for the outflow of said combustible mix, and an orientation of said cap with respect to said end portion being such that said pilot flame affects the flow of the combustible mix that exits from a flame separator of said gas-fired burner and ignites it, said Venturi tube comprising a first portion, at an end of which said cap is present, and a second portion, by means of which said Venturi tube is associated with a gas source, which is extended laterally with respect to an intermediate region of said first portion, said first portion having, on an opposite side with respect to the exit side of said combustible mix, a removable plug, wherein said at least one hole is protected in an upper region by a disk-like element which is arranged at the end of said cap.