JP2599122Y2 - Continuous furnace with muffle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a continuous furnace provided with a muffle.

[0002]

2. Description of the Related Art Conventionally, as a continuous furnace provided with a muffle, there has been known a furnace in which a heating chamber is divided into a plurality of zones by a hard board type heat insulating material formed of a ceramic fiber in a plate shape.

[0003]

Problems to be Solved by the Invention In the continuous furnace provided with the above-mentioned conventional muffle, when the heat-resistant steel muffle is thermally expanded, the heat-insulating material cannot follow the deformation of the muffle and the heat-insulating material is damaged. was there.

[0004] An object of the present invention is to provide a continuous furnace provided with a muffle in which a heat insulating material partitioning the heating chamber is not damaged even if the muffle expands thermally.

[0005]

A continuous furnace equipped with a muffle according to the present invention includes a muffle provided in a heating chamber and having a conveying path extending forward and backward, and the heating chamber is partitioned into a plurality of zones by partitions. In a continuous furnace provided with a muffle, a partition is formed by hanging a folded portion of a folded cloth-like heat insulating material (blanket) on a rod-shaped horizontal member passed between upper ends of left and right side walls of a heating chamber. It is characterized by having.

[0006]

[Function] A continuous furnace equipped with a muffle according to the present invention is a cloth-like insulation material (blanket) in which a partition is folded in half.
Is formed by being hung on a bar-shaped horizontal member passed between the upper ends of the left and right side walls of the heating chamber, so that the heating chamber can be divided into a plurality of zones by a heat insulating material, and the muffle is formed. When deformed due to thermal expansion, the heat insulator also deforms accordingly.

[0007]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a part of a continuous furnace according to the present invention. The continuous furnace (1) includes a heating chamber (2) and a muffle (3) made of heat-resistant steel. In the muffle (3), a mesh belt conveyor (not shown) extending back and forth is arranged. The interior of the heating chamber (2) is divided into a plurality of zones by partitions (4) arranged at predetermined intervals in the front-rear direction. The muffle (3) is made of heat-resistant steel, and each partition (4)
Extends back and forth. Each zone is maintained at a different temperature, and the workpiece is subjected to a required heat treatment while being transported in the muffle (3).

The heating chamber (2) comprises left and right side walls (5) and (5) each having a heater (8), a ceiling (6) and a floor (7).
The left and right side walls (5) (5), the ceiling (6) and the floor (7) are formed by connecting panels. Horizontal step portions (5a) lower than the upper end are provided inside the left and right side walls (5) (5), and the ceiling (6) forming panel is supported by these left and right step portions (5a) (5a). Have been. Muffle (3) is
It is placed on the support panel (9) at the position divided by each partition (4).

[0010] The partition (4) is a cloth-like heat insulation folded in two.
The bent part of the blanket (11) is located on the left and right sides of the heating chamber (2).
Side wall (5) (5) Hang on the bar-shaped horizontal member (10) passed between the upper ends
It is formed by doing.Blanket (11)
Molds the ceramic fiber to have flexibility.
It can be cut with cloth scissors.
A gap is created between the insulation (4) and the muffle (3).
The muffle (3) equivalent part is cut out so that there is no
You.This blanket (11) is hung on the horizontal bar (10).
The blanket (11) hangs down under its own weight and
Two parallel parts occur. Two parts parallel to each other
Between the minutes, an air layer equal to the diameter of the rod-shaped horizontal member (10)
The heat insulation effect of this air layer is attached to the partition (4).
Be added.The horizontal member (10) is made of a heat-resistant material.
It is used and does not require any particular heat insulation. Horizontal member (10)
For example, mullite tubes are used.
Various ceramics, metals, etc. can be used depending on the operating temperature
Can be

Grooves (12) and (12) into which rod-shaped horizontal members (10) are fitted are provided in the left and right step portions (5a) and (5a) of the left and right side walls (5) and (5), respectively. Each end of the member (10) is fitted.

The muffle (3) is made of heat-resistant steel,
If the temperature exceeds about ℃, deformation due to thermal expansion cannot be ignored. Therefore, if a conventional hard board type heat insulating material is used for the partition, this heat insulating material is hard, brittle and inflexible, so it cannot follow the deformation of the muffle (3), and the heat insulating material is damaged or the heater is damaged. (8) There is a problem that the contact may cause a disconnection, and that it is easily damaged during transportation or packing. On the other hand, the partition (4) of the above embodiment has its main body formed of a cloth-like heat insulating material (blanket) (11). 11) is deformed accordingly, and the above problem is solved.

Next, a comparison result of the heat insulating effect between the device according to the present invention and the conventional device will be shown. Table 1 shows the results of an experiment in which the set temperatures of the low-temperature side zone and the high-temperature side zone adjacent to each other were variously changed, and the heat insulation effect was compared by measuring the temperature of the low-temperature side zone. The partition of the embodiment
(4) is obtained by folding a blanket (11) having a thickness of 20 mm into two and supporting it on a mullite tube (10) having a diameter of 21 mm. On the other hand, the heat insulating material of the conventional example has a thickness of 50 m.
m hardware board.

[0014]

[Table 1] From the above comparative test, it can be seen that the example has a better heat insulating effect than the conventional example.

[0015]

According to the continuous furnace of the present invention, the heating chamber can be divided into a plurality of zones by the heat insulating material, and when the muffle is deformed by thermal expansion, the heat insulating material is also deformed accordingly. Even if the muffle thermally expands, the heat insulating material that partitions the heating chamber is not damaged.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a main part of a continuous furnace according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

[Explanation of symbols]

 (1) Continuous furnace (2) Heating chamber (3) Muffle (4) Partition (5) Left and right side walls (10) Horizontal bar member (11) Insulation material

Claims (1)

(57) [Scope of request for utility model registration] A muffle (3) provided in a heating chamber (2) and having a conveying path extending back and forth, wherein the inside of the heating chamber (2) is partitioned into a plurality of zones by a partition (4), In a continuous furnace equipped with a muffle, the partition (4) is passed between the upper ends of the left and right side walls (5) and (5) of the heating chamber (2) by bending the folded cloth-like heat insulating material (11). A continuous furnace provided with a muffle, formed by being hung on a horizontal rod-shaped member (10).