JPH063056A - Continuous kiln - Google Patents

Abstract

PURPOSE:To improve the safety and reliability in the case of a roller cylinder being broken by carrying an article to be calcined in a calcination passage formed horizontally in a kiln body with the aid of the rotation of a group of rotating rollers, and disposing an inner roller in each roller cylinder. CONSTITUTION:A driven kiln 1 includes a kiln body 2 in which a calcination passage 3 is horizontally formed, heaters 4 disposed on upper and lower portions of the kiln body 2, and a group of rotating rollers disposed along the calcination passage 3 for carrying an article to be calcined. In this case, the rotating rollers 5 comprise a plurality of roller cylinders disposed parallely and inner rollers 7, each of which is disposed in each roller cylinder 6 penetrating the same. Each roller cylinder 6 has one end rotatably supported on a bearing 8 and the other end rotatably supported on a roller wheel 9. A sprocket wheel 10 with which a chane 12 is engaged is fixed to the one end of the roller cylinder 6. The inner roller 7 has opposite ends thereof rotatably supported on roller wheels 13 and is fixed to the roller cylinder 6 through a pin. The roller cylinder is thus received by the inner roller 7 and is prevented from dropping onto a kiln bottom even though it is broken.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous firing furnace used for firing ceramic parts, for example.

[0002]

2. Description of the Related Art Conventionally, there is a continuous firing furnace shown in FIG. The continuous firing furnace 50 includes a firing passage 52 that is horizontally formed in a furnace body 51, and a rotary roller group 53 for transporting an article to be fired is arranged in the firing passage 52. The rotating roller group 53 is composed of a plurality of roller cylinders 54 arranged in parallel along the furnace bottom of the firing passage 52. Both ends of each roller cylinder 54 extend to the outside of the furnace body 51, and the both ends are rotatably supported by the furnace body via bearings 55 and roller wheels 56. Also, the roller cylinder 5
A sprocket wheel 57 is attached to one end of the gear 4, and a drive source (not shown) is connected to the sprocket wheel 57 via a chain 58.

Then, each of the roller cylinders 54, ...
The sagger 60 placed on the top is conveyed along the firing passage 52,
The object to be fired (not shown) stored in the sagger 60 during transportation.
Is fired by a heater 59 provided in the furnace body 51.

[0004]

By the way, in the continuous firing furnace 50 constructed as described above, the roller barrel 54 is heated during firing due to the deterioration of the roller barrel 54, the eccentricity, and the load of the object to be fired. May break, but then the following problems occurred. That is, the roller cylinder 54
When the breakage occurs in the roller cylinder 54, the broken roller cylinder 54 and the sagger 60 located on the roller cylinder 54 drop to the furnace bottom, and
1 and the furnace bottom side heater 59 will be damaged. Then, not only the broken roller cylinder 54 but also the furnace body 51 and the heater 59 must be repaired, which requires a great deal of labor and cost. Furthermore, if the roller cylinder 54 is broken, the firing work must be interrupted and repaired. If this happens, all of the objects to be fired during firing become defective firing products.

The present invention has been made in view of the above problems, and an object thereof is to provide a continuous firing furnace in which the roller cylinder and the object to be fired do not drop to the furnace bottom even if the roller cylinder is broken. .

[0006]

In order to achieve the above object, the present invention is a continuous process in which a firing passage is formed horizontally in a furnace body and a group of rotary rollers for conveying a material to be fired is installed in the firing passage. In the continuous firing furnace, an inner roller is provided inside each roller cylinder that constitutes the rotary roller group to form a continuous firing furnace.

[0007]

According to the above construction, even if the roller cylinder is broken due to the load of the object to be fired or the like, the broken roller tube and the object to be fired are received by the inner roller.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 1 is a sectional view of an embodiment of the present invention. A firing passage 3 is provided horizontally in the furnace body 2 of the continuous firing furnace 1.
Are formed. Heaters 4 are arranged in the upper and lower parts of the furnace body 2. A rotary roller group 5 for conveying the material to be fired is arranged in the firing passage 3. Rotating roller group 5
Consists of a plurality of roller cylinders 6 arranged in parallel along the furnace bottom. An inner roller 7, which is a feature of the present invention, is provided inside each roller cylinder 6 so as to penetrate therethrough coaxially with the roller cylinder 6. Both the roller cylinder 6 and the inner roller 7 are made of alumina, mullite or silicon carbide, and both ends thereof extend to the outside of the furnace body 2.

The roller barrel 6 is rotatably supported by the furnace body 2 through a bearing 8 at one end and a roller wheel 9 at the other end. A sprocket wheel 10 is further attached to one end of the roller cylinder 6 so as to rotate together. The sprocket wheel 10 is, as shown in FIG.
It is inserted in the radial direction and attached to the roller cylinder 6 by a fixing pin 11. A drive source (not shown) is connected to the sprocket wheel 10 via a chain 12.

The inner roller 7 is slightly longer than the roller cylinder 6 and both ends thereof protrude from both ends of the roller cylinder 6, and the protruding ends are rotatably supported by the furnace body 2 via roller wheels 13. Further, like the roller cylinder 6, the inner roller 7 has the above-mentioned fixing pin 11 inserted into one end thereof, and is rotatably connected to the roller cylinder 6 by the fixing pin 11.

Then, the roller cylinder 6 which receives the rotational drive of the drive source via the sprocket wheel 10 rotates together with the inner roller 7, and the container 60 placed on the rotary roller group 5 via the base plate 61. Are conveyed along the firing passage 3. During transportation, the object to be fired (not shown) housed in the bowl 60 is fired by being heated by the heater 4.

It is conceivable that the roller cylinder 6 may be broken during conveyance due to deterioration or eccentricity of the roller cylinder 6 or the load of the object to be fired, as in the conventional example. However, since the inner roller 7 is provided inside the roller cylinder 6, and the broken roller cylinder 6 is received by the inner roller 7,
It never falls to the bottom of the furnace. Further, at this time, since the sagger 60 is continuously conveyed by the rotation of the inner roller 7 inside the broken roller cylinder 6 and the roller cylinder 6 around it, it is not necessary to interrupt the baking, and the repair of the roller cylinder 6 is performed. Can be performed after the above process is completed and the roller cylinder 6 is not broken so that all the products to be baked are not defective.

In this embodiment, the inner roller 7 is attached to the roller cylinder 6 by means of the fixing pin 11 so as to rotate integrally. As a result, as described above, it is possible to smoothly transfer the casket when the roller cylinder is broken and to prevent the inner roller 7 from being deformed such as warped when exposed to high temperature during firing. To be

[0014]

As described above, according to the present invention, since the inner roller is arranged inside the roller tube, even if the roller tube is broken during firing, the broken roller tube is received by the inner roller. No longer dropped to the bottom of the furnace, and there is no double damage such as damage to the furnace body and heater due to breakage of the roller cylinder. Therefore, it is sufficient to repair only the roller cylinder when the roller is broken, and the labor and cost involved in repair can be reduced.

Further, even if the roller cylinder is broken, the inner roller supports the casket, so that it is not necessary to interrupt the baking and repair it. The inconvenience disappeared.

Further, since the double tube structure is composed of the roller cylinder and the inner roller, it is possible to alleviate the thermal shock caused by the movement of the casket and the rapid cooling, and also to prevent the roller cylinder itself from being broken. The effect was also obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing a structure of a continuous firing furnace according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged view of a main part of the above embodiment.

FIG. 4 is a cross-sectional view showing the structure of a conventional continuous firing furnace.

[Explanation of symbols]

 2 Furnace body 3 Firing passage 5 Rotating roller group 6 Roller cylinder 7 Inner roller

Claims (1)

[Claims] 1. A continuous firing method in which a firing passage (3) is horizontally formed in a furnace body (2) and a rotary roller group (5) for conveying an article to be fired is installed in the firing passage (3). A continuous firing furnace, characterized in that an inner roller (7) is arranged inside each of the roller cylinders (6) constituting the rotary roller group (5).