DE8915046U1 - Nozzle ring for a liquid propane gas burner for hot air balloons - Google Patents

Description

Description

Applicant:

Company Schroeder fire balloons GmbH Ans Bahnhof 1

D-5502 Schweich

Description: Jet!;rance for a

rlüs?. sjpropang.33burner for

HotU itballom

The innovation relates to a nozzle ring for a liquid propane gas heater for hot air balloons, which is designed as an internally hollow ring with at least one gas supply opening and which has gas outlet nozzles arranged at a distance from one another on its upper side parallel to the ring plane.

( ) In such nozzle rings, the gas outlet nozzles are located at a distance from one another on the top of the nozzle ring. The performance of such a nozzle ring is determined by the number of gas outlet nozzles. The higher the number of gas outlet nozzles, the higher the heat output that can be generated with such a nozzle ring.

The diameter of the nozzle ring cannot be increased at will. Furthermore, the distance between the gas outlet nozzles cannot be reduced at will, since these gas outlet nozzles must be attached to the nozzle ring either by screws or by welding or similar , and a minimum distance must be provided for these nozzles.

Attempts have therefore already been made to use a nozzle ring consisting of an inner hollow ring into which holes have been drilled from the top. Experience has shown that such nozzle rings cause the gas to escape or the gas flame to burn very unevenly. In addition, such nozzle rings produce a lot of noise.

The aim of the innovation is therefore to further develop a nozzle ring of the type mentioned above in such a way that a uniform and stable combustion flame is produced at high power and with low noise levels.

This problem is solved by providing an upper and a lower ring half-shell, each of which has an approximately semicircular cross-section, as viewed from a central ring plane, that the two ring half-shells are arranged close to one another and that in the upper ring half-shell, at a distance from one another, recesses designed as gas jet nozzles are arranged, running perpendicular to the ring plane.

Advantageously, the recesses designed as gas outlet nozzles are cylindrical. Preferably, the edges of the recesses are curved and merge into the top and the inside of the upper ring half-shell.

Advantageously, the cross-section of the recesses on the inside of the upper ring half-shell is larger than on the upper side.

Preferably, the cross-sectional width of the upper ring half-shell in the area of the recesses is approx. 5 mm.

The ring half shells are advantageously welded together.

The innovation is illustrated in the drawings as an example. They show:

Fig. 1 shows a nozzle ring according to the innovation in plan view and

Fig. 2 shows the nozzle ring according to Fig. 1 in cross section.

According to Fig. 1 and 2, a nozzle ring (1) consists of an upper ring half-shell (2) and a lower ring half-shell (3) as seen from a central ring plane. In the upper ring half-shell (2) there are recesses (4) arranged at a distance from one another, running perpendicular to the ring plane and designed as gas outlet nozzles.

As shown in particular in Fig. 2, the Recesses formed with gas outlet nozzles (A)

cylindrical, wherein the cross-section of the recesses on the inner side (5) of the upper ring half-shell (2) is larger than on the upper side (6) of the upper ring half-shell.

Fig. 2 further shows that the upper edge (7) of the Recesses (4) rounded into the top (6) and the

lower edge (8) rounded into the inside (5) of the upper

Ring half shell.

Furthermore, the cross-sectional width (L) of the upper ring shell (2) in the area of the recesses (4) is approx. 5 mm, so that the recesses also have a length of approx. 5 mm.

To manufacture the jet crane, two ring-shaped pipe sections of a pipe with a suitable diameter and wall thickness are used. The pipe sections are turned on the lathe on one of the cutting surfaces parallel to the ring plane, so that ring half-shells with the cross-section shown in Fig. 2 are created. The corners of the ring half-shells are milled off to reduce weight, as Fig. 2 also shows. The recesses (4) can then be drilled and, after rounding off the edges (7) and (8), the two ring half-shells (2) and (3) can be welded together.

The recesses (4) with their rounded edges ensure a uniform gas outlet with little turbulence, so that a safe and quietly burning flame is achieved. In addition, the design of the recesses and the large number of recesses, which can be arranged almost as close to one another as desired, ensure high performance of the nozzle ring with relatively low noise.

The lower ring half shell (3) has a smaller wall thickness to reduce weight.

Claims (6)

Protection claims 1. Nozzle ring for a liquid propane gas burner for Hot air balloon, which is designed as an internally hollow ring with at least one gas supply opening and which has gas outlet nozzles arranged at a distance from one another on its upper side parallel to the ring plane, characterized in that an upper and a lower ring half-shell (2) and (3) are provided as viewed from a central ring plane, each of which has an approximately semi-ring-shaped cross-section, that the two ring half-shells are arranged tightly on one another and that in the upper ring half-shell (2) there are recesses (4) arranged at a distance from one another, perpendicular to the ring plane, designed as gas outlet nozzles. 2. Nozzle ring according to claim 1, characterized in that the recesses (4) designed as gas outlet nozzles are cylindrical. 3. Nozzle ring according to claim 1 or 2, characterized in that the edges of the recesses (4) are rounded and merge into the upper side (6) and the inner side (5) of the upper ring half-shell (2). 4. Nozzle ring according to one of claims 1 to 3, characterized in that the cross section of the recesses (4) on the inside (5) of the upper ring half-shell (2) is larger than that of the upper side (6). 5. Nozzle ring according to one of claims 1 to 4, characterized in that the cross-sectional width (L) of the upper ring half-shell (2) in the region of the recesses (4) is approximately 5 mm. 6. Nozzle ring according to one of claims 1 to 5, characterized in that the ring half shells C2) and (3) are welded together.