JPH0133615Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an exhaust structure for a molten glass forehearth that has an improved mechanism for discharging combustion waste gas from the molten glass forehearth to the outside of the furnace.

[Technical background of the invention and its problems]

Conventionally, in a molten glass fore-furnace that adjusts the temperature of molten glass to a temperature suitable for molding, in order to discharge the combustion waste gas generated in the furnace to the outside of the furnace, a molten glass fore-furnace 11 is used as shown in FIG. This is done by using circular or rectangular exhaust holes 13 with a hole diameter of about 10 cm that are bored at required locations in the ceiling 12 of the air conditioner. Exhaust hole 1
A slide brick 15 is slidably provided in the upper end opening 14 of 3, and by moving the slide brick 15 left and right to change the size of the opening 14, the amount of waste gas discharged and the pressure inside the furnace can be adjusted. It is now possible to make adjustments. However, as the slide brick slides through this exhaust hole, deposits near the opening, such as dust generated due to temperature differences, fall through the exhaust hole into the furnace and contaminate the molten glass. There are drawbacks.

[Purpose of invention]

This invention was made in consideration of the above circumstances,
It is an object of the present invention to provide an exhaust structure for a molten glass forehearth in which dust does not fall into the furnace from an exhaust hole for combustion waste gas.

[Summary of the idea]

In order to achieve the above object, the present invention provides an exhaust hole in the upper part of the inner wall of the furnace and a jetty at the lower edge of the opening. That is, an exhaust hole that opens at the upper part of the inner wall of the molten glass forehearth and has a jetty along the lower edge of the opening, an exhaust passage that connects to this exhaust hole and extends upward, and a sliding hole at the lower end of this exhaust passage. This is an exhaust structure for a molten glass forehearth equipped with a movably provided damper.

[Example of idea]

The details of the present invention will be explained with reference to the embodiment shown in FIG. The exhaust hole 3 that opens at the upper part of the side wall 2 of the molten glass forehearth 1 is provided with a jetty 5 along the lower edge of the opening so that the lower edge of the opening is higher than the bottom 4 of the exhaust hole. An exhaust passage 6 is connected to this exhaust hole 3.
extends upward, and the waste gas inside the furnace is discharged from the exhaust hole 3 through the exhaust passage 6 to the outside of the furnace. Further, a damper 7 is slidably provided at the lower end of the exhaust passage 6 to open and close the passage, and by sliding the damper 7, the amount of exhaust gas discharged and the pressure inside the furnace are adjusted. ing.

In the exhaust structure configured in this manner, all the dust from the exhaust hole 3 and the exhaust passage 6 or the dust generated by the sliding of the damper 7 falls to the exhaust hole bottom 4, and moreover, the dust is deposited on the exhaust hole bottom 4. Since the dust is prevented from flowing into the furnace by the jetty 5, the dust from the exhaust hole 3 does not mix into the molten glass 8. Further, this dust can be removed to the side of the furnace, which has the advantage that the area around the exhaust hole can be easily cleaned.

[Effect of idea]

As described above, the present invention includes an exhaust hole that opens at the upper part of the inner wall of the molten glass forehearth and has a jetty along the lower edge of the opening, an exhaust passage connected to the exhaust hole, and a damper for the exhaust passage. This exhaust structure has the advantage that dust generated in the exhaust hole and exhaust passage does not fall or flow into the furnace, and accumulated dust can be easily removed.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view showing an embodiment of the present invention;
The figure is a cross-sectional view showing a conventional example of a molten glass forehearth. 1... Molten glass forefurnace, 3... Exhaust hole, 4...
Exhaust hole bottom, 5... Jetty, 6... Exhaust passage, 7...
...damper.

Claims (1)

[Scope of utility model registration request] An exhaust hole that opens at the upper part of the inner wall of the molten glass forehearth and has a jetty along the lower edge of the opening, an exhaust passage that connects to this exhaust hole and extends upward, and a slidable part at the lower end of this exhaust passage. An exhaust structure for a molten glass forehearth, which is equipped with a damper installed in the molten glass forehearth.