JP2560482Y2 - Furnace gate damper - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate damper for a furnace installed in a flue to control furnace pressure.

[0002]

2. Description of the Related Art For example, in an underdrawing furnace as shown in FIG. 1, it is desirable to attach a slidable gate damper 4 to a flue 3 connecting a furnace body 1 and a chimney 2 in order to control furnace pressure. It is. In this case, the damper itself can be made of a refractory having excellent heat resistance, a ceramic fiber, or the like, but in order to facilitate opening and closing, a metal material must be used for the outer frame 4a and the guide 4b of the damper. Not get. Then, since these metal materials are exposed to high heat, they are worn out in a short period of time, and there has been a problem that much trouble is required for maintenance.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and provides a gate damper for a furnace which can be easily opened and closed, and has a long life with little maintenance. It was completed for.

[0004]

In order to solve the above-mentioned problems, a first invention is to provide a hollow guide made of metal into which cooling air is blown on both sides of a flue. Characterized in that the hollow guide is slidably supported by the hollow guide. In a second invention made to solve the same problem, a metal guide is provided on both sides of the flue, and a heat-resistant ceramic damper attached to a metal hollow frame into which cooling air is blown is used. Slidably supported by the guide.

[0005]

According to the first aspect of the present invention, since the metal guide that slidably supports the heat-resistant ceramic damper is a hollow guide that is cooled by driving cooling air into the inside, the high temperature flowing through the flue is high. It is possible to prevent the outer frame of the guide and the damper from being worn by the exhaust gas. Further, according to the second invention, since the frame of the heat-resistant ceramic damper is a metal hollow frame into which the cooling air is blown, the high temperature exhaust gas flowing through the flue may cause the outer frame of the guide and the damper to be worn. Is prevented. Moreover, in any case, since the damper is opened and closed along a metal guide, there is an advantage that the damper can be easily opened and closed.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail with reference to the illustrated embodiment. Embodiment of the First Invention FIG. 2 shows an embodiment of the first invention, in which metal hollow guides 5 are attached to both side walls of a flue 3 and a heat-resistant fiber damper 4 is provided on the upper surface thereof. It is something that was supported. As long as the damper 4 is made of a ceramic having heat resistance, a refractory, a lightweight foam, a ceramic fiber block or a molded product made of a ceramic fiber can be used. However, the damper 4 is lightweight and hardly affected by thermal shock due to cold air. Desirably, it is made of fiber. The outer periphery of the heat-resistant fiber damper 4 is surrounded by a metal frame 6, and a space between the frame 6 and the hollow guide 5 is a slide surface. In the embodiment, both the frame 6 and the hollow guide 5 are made of stainless steel, and the frame 6 is cooled by the cooling air blown out from the air ejection holes 7 formed on the inner surface of the hollow guide 5. Has become. As shown in FIG. 3, a rack 8 is integrally attached to the damper 4 made of heat-resistant fiber, and the rack 8 is engaged with a pinion 10 driven by a motor 9 to open and close the damper 4. be able to.

In the first invention, the cooling air blown into the hollow guide 5 not only cools the hollow guide 5 itself, but also
The cooling frame blown out of the air jet holes 7 also cools the frame 6 around the outer periphery of the damper 4 made of heat-resistant fiber, so that these metal parts are prevented from being worn, and can be used for a long period of time without requiring much maintenance. can do. In addition, since the slide surface is provided between the hollow guide 5 and the frame 6, the damper 4 can be easily opened and closed, and the furnace pressure can be controlled accurately.

FIG. 4 shows an embodiment of the second invention. In this case, the metal guides 11 provided on both side walls of the flue 3 are solid. is there. on the other hand,
A metal frame 6 and a metal hollow frame 12 are attached to the outer periphery of the heat-resistant fiber damper 4.
Cooling air is blown into 12. Further, similarly to the first invention, an air ejection hole 13 is formed in the hollow frame 12 to cool the periphery thereof.

In the second invention, since the cooling air blown into the metal hollow frame 12 cools the metal hollow frame 12 and the part in contact with the metal hollow frame 12, the damper is prevented from being worn by the high-temperature exhaust gas. 4 can be opened and closed. As in the first invention, the opening and closing of the damper 4 can be performed lightly.

[0010]

[Effects of the Invention] As described above, according to these inventions, since the metal slide portion of the damper is formed as a hollow body and the cooling air is blown therein, it is easy to open and close, and of course, the maintenance is troublesome. Has the advantage that it can be used for a long period of time with little need for Therefore, the present invention has a very high practical value as a gate damper for a furnace that solves the conventional problems.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a conventional example.

FIG. 2 is a sectional view showing an embodiment of the first invention.

FIG. 3 is another sectional view showing the embodiment of the first invention.

FIG. 4 is a sectional view showing an embodiment of the second invention.

[Explanation of symbols]

 3 flue 4 heat resistant fiber damper 5 metal hollow guide 11 metal guide 12 metal hollow frame

Claims (2)

(57) [Scope of request for utility model registration] 1. A gate type damper for a furnace, wherein a hollow guide made of metal into which cooling air is blown is provided on both sides of a flue, and a damper made of heat-resistant ceramic is slidably supported by these hollow guides. . 2. A metal guide is provided on both sides of the flue, and a heat-resistant ceramic damper attached to a metal hollow frame into which cooling air is blown is slidably supported by these guides. Furnace gate damper.