JPS6036880Y2 - Burner for flame spraying - Google Patents

Description

[Detailed description of the invention] This invention relates to a thermal spray burner used when repairing furnace walls by flame spraying. Specifically, the invention is designed to be lightweight so that it is easier for humans to perform thermal spraying work. Regarding thermal spray burners.

Conventional thermal spray burners, like normal heating burners, have a fuel gas flow path, a combustion support gas flow path, and a cooling water flow path (jacket) formed concentrically in the cross section of the burner barrel. It is a multi-tube type.

However, it is for hand work at the waist and the length of the gun barrel is 2m to 4r.
A long burner with rL has a pipe diameter that is thicker toward the outside of the concentric circle, which makes the pipe wall thicker and heavier.Also, since the burner is designed to cool the entire burner, the amount of cooling water that stays in the jacket increases, making the overall This resulted in considerable weight, which hindered workability.

Furthermore, the above-mentioned concentric structure is complicated to manufacture and is accordingly expensive.

The present invention is a thermal spray burner that eliminates this inconvenience. Especially in long thermal spray burners with a total length of 2 m to 4 m for manual use, the water cooling jacket is only used in the nozzle part, and it is used for fuel gas, combustion supporting gas, and cooling. The water conduits are not concentrically circular in cross section but bundled, making them lightweight and easy to manufacture.

The present invention will be explained in detail below with reference to the drawings. FIG. 1 is a front view of a thermal spray burner which is an embodiment of the present invention, and FIG. 2 is a right side view thereof.

This burner is a handy thermal spray burner that is mainly used when repairing coke ovens manually, and has a total length of 2.5 m because the worker works at a position that is some distance away from the repaired area of the oven wall. have

In the figure, a fuel gas conduit 1 is connected to a rear central portion of a nozzle portion 3 via a vent 2.

A fuel gas such as propane is introduced along with the thermal spraying powder from the arrow a, passes through the conduit 1 and the vent 2, and is ejected from the ejection port 4 into the combustion chamber 5.

The combustion-supporting gas conduit 6 is installed parallel to the fuel gas conduit 1, and the introduction part to the nozzle part 3 is connected to the rear thereof at right angles from below in the figure.

The combustion-supporting gas is mainly oxygen gas, which is introduced from the direction of the arrow, enters the nozzle section 3 through the conduit 6, is ejected from the ejection lower into the combustion chamber 5, and mixes with the fuel gas. Melt the material.

8 is a cooling water introduction conduit, 9 is a cooling water discharge conduit, and 10 is a cooling water jacket, which is mainly used in the combustion chamber 5 of the nozzle part 3.
Both conduits 8 and 9 are installed parallel to the fuel gas conduit 1 and the combustion supporting gas conduit 6, and are connected to the rear part of the jacket 10, respectively.
It is fixed in a bundle parallel to the conduits 1 and 6.

Therefore, the cooling water is introduced from the arrow C in FIG. 1, passes through the cooling water jacket 10, and is led out from the arrow d.

In addition, the cross section taken along the line ■-■ in Figure 2 forms a bundle-like assembly as shown in Figure 3, and the contact portions of each conduit are fixed by welding or brazing 11, and this allows heat to be distributed between each conduit. It improves conduction.

In addition, bars 12 and 13 are provided in the portions of the cooling water introduction conduit 8 and the cooling water discharge conduit 9 near the connecting portions to the cooling water jacket 10 and away from the bundled aggregate, thereby increasing the cooling effect on the conduits 1 and 6. I raised it.

By doing the above, the weight of the thermal spray burner of this example is approximately 3.1 to 9, while the same capacity (powder material 1
The weight of a conventional burner with a multi-tube structure (0 to 15 ko/h) is about 15:9, so it was possible to reduce the weight to about 175.

In this way, the thermal spray burner of the present invention gathers the conduits for fuel gas and combustion-supporting gas cooling water in a bundle rather than in a concentric circle, and has a water cooling jacket provided only at the nozzle, so that each conduit can be separated. By making the cooling water conduit thinner, there is no need to share the jacket along the entire length of the burner barrel, making the burner itself extremely lightweight, and by reducing the amount of cooling water that stays in the burner, it is easier to operate. The weight could be further reduced.

Therefore, thermal spraying work has become much easier.

Furthermore, the structure has been simplified, making it easier to process and manufacture the burner.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the thermal spray burner of the present invention, FIG. 2 is a right side view thereof, and FIG. 3 is a sectional view taken along line 2--2 in FIG. 1 is a fuel gas conduit, 2 is a vent, 3 is a nozzle part, 4 is a jet port, 6 is a combustion supporting gas pipe, 7 is a jet port, 8 is a cooling water introduction pipe, 9 is a cooling water discharge pipe, 10 is a cooling water jacket, 11 is welding or brazing, and 12.13 is a bar.

Claims (1)

[Scope of utility model registration request] In a thermal spray burner in which powder material for thermal spraying is conveyed by fuel gas or combustion supporting gas, and the gas is ejected through a nozzle and melted in the flame, a water cooling jacket is attached only to the nozzle part, and the fuel gas conduit and support gas are installed in a thermal spraying burner. A burner for flame spraying characterized in that a fuel gas conduit and a cooling water conduit are assembled into a bundle.