DE9308974U1 - Atmospheric premix gas burner - Google Patents

Description

1 B. June 1993

Joh. Vaillant GmbH u. Co, GM 1149

The invention relates to an atmospheric premix gas burner with several fuel rods which are supplied with a fuel gas-air mixture via gas nozzles inserted into a gas distribution pipe and are provided with fuel mixture outlet openings.

Known burners of this type generally use gas distribution pipes with a round or square cross-section. In such burners, the gas distribution pipe is connected to a gas connection via a valve. When the burner is started, the gas distribution pipe must first fill with gas before it can flow through the nozzles into the mixing tubes of the burner rods while sucking in air. Since the gas distribution pipe in the known burners has a relatively large volume, there are noticeable ignition delays when the burner is started, which means that the ignition device remains under load for a correspondingly long time.

The aim of the invention is to avoid these disadvantages and to propose a burner of the type mentioned at the beginning which results in very rapid ignition.

According to the invention, this is achieved in that the gas distribution pipe has a prismatic cross-section in which two

Edges of the pipe connected by a convex wall line are connected by a straight or concave wall line.

This results in a relatively small cross-section of the
gas distribution pipe and thus a relatively small volume. This
A significant reduction in the ignition time of the burner is achieved, and less unburned gas can escape from the nozzles into the atmosphere after the burner has stopped burning.

According to a preferred embodiment of the invention, it can be provided that the gas distribution pipe has a triangular or sickle-shaped cross-section.

This measure results in the same side walls as
in a square or rectangular shaped tube, a cross-section of only half as large. Essentially in an inventive
The advantage of the cross-section is that it has sufficiently large extensions in two essentially perpendicular planes to enable the nozzles and the gas connection to be easily attached and, on the other hand, to keep the free cross-section of the gas distribution pipe small. This can be achieved very easily by means of a
triangular or sickle-shaped cross-section.

Furthermore, it can be provided that the gas distribution pipe has a triangular cross-section, with the gas nozzles or a gas connection being arranged on two side walls of the gas distribution pipe enclosing an angle of 90°.

This results in a very simple structure.

The invention will now be explained in more detail with reference to the drawing.

Showing:

Figure 1 shows a first embodiment of a gas distribution pipe, Figure 2 shows a section thereof.

Figure 3 shows a variant of the invention and

Figure 4 shows a cross-section.

In all figures, the same reference symbols indicate the same details.

The gas distribution pipe 1, which has a triangular cross-section, can be supplied with fuel gas on its upper side 8 via a gas connection 2 which leads to a valve (not shown).

Gas nozzles 3 are arranged on the side wall 9 of the gas distribution pipe 1 facing the combustion pipes 4 held in a burner plate 5. Mixing pipes 10 are inserted in the combustion pipes 4 in the usual way.

To attach the gas distribution pipe 1 to the burner plate 5, Mounting plates 7.1 or 7.2 are provided. The plate 7.1 is provided with a fastening bolt 6 and enables the fastening

of the gas distribution pipe to the part of the burner plate 5.1 underneath. The plate 7.2 is used to attach the gas distribution pipe to the burner plate 5.2 if part 5.1 of the burner plate is not present.

The gas distribution pipe 1 has a cross-section in which two edges A and B, connected by a substantially convex wall line a, b, are connected to one another by a straight wall line c. In principle, it would also be possible to connect the edges A and B of the cross-section of the gas distribution pipe 1 by a convex circular arc, whereby the nozzles 3 and the gas connection 2 can be attached to the corresponding outer surface, and by another concave line. In any case, the gas distribution pipe 1 has a small cross-section, whereby sufficiently large side walls 9 and 8 are provided.

Due to the small cross-section of the prismatic, preferably triangular gas distribution pipe 1, the gas distribution pipe 1 can be filled with gas very quickly when the burner is started, whereby the burner can ignite very quickly.

Claims (3)

t 5 June 1993 Joh. Vaillant GmbH u. Co. GM 1149 CLAIMS 1. Atmospheric premix gas burner with a plurality of fuel rods which are supplied with a fuel gas-air mixture via gas nozzles inserted into a gas distribution pipe and are provided with fuel gas mixture outflow openings, characterized in that the gas distribution pipe (1) has a prismatic cross-section in which two edges (A, B) of the pipe which are connected to one another via a convex wall line (a, b) are connected to one another via a straight or concave wall line (c). 2. Burner according to claim 1, characterized in that the gas distribution tube (1) has a substantially triangular or sickle-shaped cross-section. 3. Burner according to claim 1 or 2, characterized in that the gas distribution pipe (1) has a triangular cross-section, with two The gas nozzles (3) or a gas connection (2) are arranged on the side walls of the gas distribution pipe (1) which enclose an angle of 90°.