Gas burner for boiler
AssigneeWorgas Bruciatori S.r.l.
InventorsTullio PALTRINIERI, Marco FRACCHINI, Paolo GILLI
Life of this patent
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Abstract
A gas burner (1) comprises a support plate (2) with a passage opening (8) for the gas and an annular wall (11) formed around the passage opening (8), a diffusing wall (19) and a further flow element (20,21,22) inserted on the annular wall (11) in flow communication with the passage opening (8), wherein the annular wall (11) forms a plurality of punches (16) with a recess (17) and an opposite projection (23), wherein the recess (17) accommodates a locking protuberance (25) of the diffusing wall (19) and the projection (23) extends in a locking hole (24) of the further flow element (20, 21, 22).
Claims18
Gas burner (1) for boiler, comprising:
- a diffusing wall (19) on which the combustion takes place,
- a support plate (2) for the connection of the burner (1) to a combustion chamber, said support plate (2) having a passage opening (8) for the gas and a continuous or interrupted annular wall (11) formed around the passage opening (8) and having a radially inner surface (12) and a radially outer surface (14),
- optionally a further flow element (20, 21, 22),
- wherein the diffusing wall (19) and, optionally, the additional flow element (20, 21, 22), are connected to the support plate (2) and in flow communication with the passage opening (8) by mutual insertion of an annular end region (33, 34) thereof with the annular wall (11),
- characterized in that a plurality of punches (16) is formed in the annular wall (11) forming each a recess (17) in the radially outer surface (14) and a corresponding projection (23) on the radially inner surface (12),
- wherein the recess (17) is adapted to accommodate a locking protuberance (25) of the end region (33) of the diffusing wall (19) and the projection (23) is adapted to extend in a locking hole (24) of the end region (33;
- 34) of the further flow element (20, 21, 22) and/or of the diffusing wall (19).
Burner (1) according to one of the preceding claims, wherein the annular end region (33;
- 34) of the diffusing wall (19) and/or of the further flow element (20, 21, 22) is without perforation for gas passage.
Burner (1) according to one of the preceding claims, wherein the punches (16) are distributed with a constant pitch around the circumference of the annular wall (11).
Burner (1) according to one of the preceding claims, wherein the annular wall (11) is made of aluminum and has a thickness greater than the thickness of the diffusing wall (19) which is made of stainless steel.
Burner (1) according to one of the preceding claims, comprising an upper bottom (27) connected to an upper edge (28) of the diffuser (19) for closing the burner (1) on the side opposite to the support plate (2).
Burner (1) according to one of the preceding claims, wherein the further flow element (20, 21, 22) includes one or more of:
- a perforated distribution wall (20),
- a distribution baffle (21),
- an anti-noise trumpet (22),
- a Venturi insert.
Burner (1) according to one of the preceding claims, wherein at least one of the radially inner (12) and outer (14) surfaces forms an insertion end step (13, 15) against which the flow element (20, 21, 22) and/or the diffuser (19) abut.
Method for manufacturing a gas burner (1), comprising:
- arranging a diffusing wall (19) with an annular end region (33) having a plurality of reference holes (26)
- arranging a support plate (2) for the connection of the burner (1) to a combustion chamber, said support plate (2) having a passage opening (8) for the gas and a continuous or interrupted annular wall (11) formed around the passage opening (8) and having a radially inner surface (12) and a radially outer surface (14),
- arranging a further flow element (20, 21, 22) having an annular end region (34) with a plurality of locking holes (24),
- inserting the end region (34) of the flow element (20, 21, 22) in a female seat formed by the radially inner surface (12) of the annular wall (11),
- then, punching the annular wall (11) at the positions of the locking holes (24) so that each punching (16) forms a recess (17) in the radially outer surface (14) and a corresponding projection (23) which protrudes from the radially inner surface (12) of the annular wall (11) into the corresponding locking hole (24) of the flow element (20, 21, 22) for locking it,
- inserting the diffuser (19) on the flow element (20, 21, 22) and on a male seat formed by the radially outer surface (14) of the annular wall (11) and overlapping the reference holes (26) of the diffusing wall (19) on the recesses (17) of the punches (16) of the annular wall (11),
- bending, by punching, the edges of the reference hole (26) into the recesses (17) of the annular wall (11) fora mutual locking thereof.
Dependencies are inferred from the claim text.