JPH0137647B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application: This invention relates to a gas burner in which it is desired to increase the diameter of the generated flame and to maintain the flame in a stable state.

Conventional technology: For gas burners that inject oxygen and fuel gas (particularly hydrogen) into a combustion space to generate a flame, a central hole and a series of ring-shaped gaps formed by a group of concentric tubes are used as oxygen and fuel gas nozzles. This is known to contribute to increasing the flame diameter and maintaining the flame in a stable state.

Problem to be solved by the invention: The gas burner described above, whose nozzle is formed by a group of concentrically arranged tubes, should be able to generate a flame of a desired diameter by increasing the number of tubes; The diameter of the nozzle is only about 40 mm when the fuel gas is hydrogen. This is because the radiant heat from the flame and the object side heats the inner tube to a temperature higher than the allowable limit.To avoid this, a cooling device may be installed in each ring-shaped gap. Although it is conceivable, doing so would be difficult in terms of increased weight and installation space, so it would be difficult to implement.

Means for Solving the Problems: An object of the present invention is to provide a gas burner that can maintain the flame in a stable state and increase the flame diameter without the above-mentioned difficulties. A gas introduction member with an oxygen supply port and a fuel gas supply port, a large number of annular mounting seats are attached to a small-diameter pipe support member provided in a stepped manner, and the gap between the gas introduction member and the burner is attached to the support member. a water-cooled jacket surrounding a group of small-diameter tubes for oxygen induction that narrows toward the front end, and a first tube that guides the fuel gas supplied to the fuel gas supply port to the outside of the group of small-diameter tubes;
and a second fuel gas flow path that guides the fuel gas supplied to the fuel gas supply port to the fuel gas jet pipe arranged at the center of the small-diameter pipe group. Providing a bridging material that communicates the space between the back surface of the small-diameter pipe support member and the oxygen supply port and partitions this oxygen supply space from a space in the fuel gas injection pipe arranged at the center of the small-diameter pipe group; The present invention is characterized in that an oxygen dispersion porous plate is provided within the oxygen supply space.

Effect: In the above invention, the small diameter tube group is cooled by the fuel gas flowing through the first flow path;
This is done by the fuel gas flowing through the second flow path, the oxygen flowing through the small diameter tube group itself, and the water cooling jacket. The small diameter tube group is cooled from the outside by the fuel gas flowing through the first fuel gas flow path, and is cooled from the inside by the fuel gas flowing through the second fuel gas flow path. In addition, the oxygen dispersion perforated plate provided in the space between the front surface of the gas introduction member and the back surface of the small-diameter tube support material allows oxygen to uniformly enter the small-diameter tube group, causing local heating in the small-diameter tube group. prevent this from occurring.

Embodiment: FIGS. 1 to 6 show an example of a gas burner according to the present invention. In these figures, 1 is a water cooling jacket provided in the same manner as in the case of a conventional gas burner, 2 is a tube group consisting of a large number of small diameter tubes 3 (small diameter tube group), and 4 is a support material for the small diameter tube group 2 ( small diameter pipe support material). The small diameter pipe support member 4 is provided with a large number of annular mounting seats 4a (see FIG. 3) in a stepped manner.

The small diameter pipe 3 is an element that provides an oxygen flow path through its center hole 6 (see FIG. 5), and its oxygen inflow side end 5 is fixed to the small diameter pipe support member 4.

Reference numeral 7 denotes a gap between the small diameter tubes 3 (interpipe gap), which is shown enlarged in FIGS. 3 and 4.

Oxygen is introduced into the center hole 6 of the small diameter pipe 3 and fuel gas is introduced into the inter-pipe gap 7 using a gas introduction member equipped with an oxygen supply port 8 and a fuel gas supply port 9 connected to a flexible pipe for introducing gas. It is carried out after 10 steps.

Oxygen for combustion of fuel gas is supplied to the oxygen supply port 8, the flow path 11 in the gas introduction member 10, and the space 12 (oxygen supply space) between the front surface of the gas introduction member 10 and the back surface of the small diameter pipe support member 4. ” and is supplied to the small diameter pipe 3. 13 is a perforated plate provided in the space 12;
This distributes the oxygen flowing through the space 12 under stable conditions.

On the other hand, the fuel gas is supplied to the outside and inside of the small diameter tube group 2 through the flow paths 14, 15, and 16 in the gas introduction member 10. A flow path (first fuel gas flow path) that guides fuel gas from the outside of the small diameter tube group 2 to the interpipe gap 7 and a flow path that leads fuel gas from the inside of the small diameter tube group 2 to the interpipe gap (second fuel gas flow path). The gas flow paths) contribute to the cooling of the small diameter tube group 2 by the fuel gas flowing through them.

FIG. 3 is a detailed view of the second fuel gas flow path. As shown in this figure, the flow path 16 in the gas introduction member 10 is connected to a fuel gas jet pipe 18 via a bridging material 17.
The fuel gas from the flow path 16 flows through this pipe 18.
It is supplied to the interpipe gap 7 through the upper opening 19. When the fuel gas is hydrogen, the ratio of the amount of oxygen flowing through the small diameter tube group 2 and the amount of hydrogen flowing through the inter-tube gap 7 is about 1:4.

At the center of the gas introduction member 10, as shown in FIG. 6, an oxygen supply port 20 is provided for supplying oxygen with a fine powder having a relatively low melting point added thereto as required. 21 shows the addition part of fine powder. Oxygen supply port 2
0 continues to the tube 22 located at the center of the small diameter tube group 2.
The purpose of adding fine powder to the oxygen passing through the tube 22 is to form a film on the object to which the flame is applied.

Effects of the invention: The present invention significantly alleviates the restrictions on increasing the nozzle diameter (increasing the flame diameter) imposed on conventional ones due to overheating of the pipes that eject oxygen and fuel gas, and thereby This makes it possible to manufacture a gas burner that can heat large objects quickly and uniformly.

[Brief explanation of drawings]

Fig. 1 is an external view of the first embodiment of the present invention;
The figure is a vertical cross-sectional view of the gas burner shown in Figure 1, Figure 3 is an enlarged vertical cross-sectional view of a part of Figure 2, and Figure 4 is taken in the direction of line AA in Figure 3. 5 is a longitudinal sectional view showing the attachment relationship between the small diameter tube and the small diameter tube support, and FIG. 6 is a horizontal longitudinal sectional view of the gas burner shown in FIG. 1.

Claims (1)

[Claims] 1. A gas introduction member equipped with an oxygen supply port and a fuel gas supply port, a small diameter pipe support member provided in a stepped manner with a large number of annular mounting seats, and a small diameter pipe support member that is attached to this support member, and the gap between them is connected to the front end of the burner. a first fuel gas flow path that guides the fuel gas supplied to the fuel gas supply port to the outside of the small diameter tube group; A second fuel gas flow path is provided that guides the fuel gas supplied to the supply port to the fuel gas jet pipe arranged at the center of the small diameter pipe group, and is provided between the front surface of the gas introduction member and the back surface of the small diameter pipe support member. This space is connected to the oxygen supply port, and a bridge material is provided to partition this oxygen supply space from the space in the fuel gas injection pipe located at the center of the small diameter pipe group, and the perforated oxygen dispersion plate is connected to the oxygen supply port. A gas burner characterized in that it is installed in a storage space.