JP2529714Y2 - Roller hearth kiln wall block - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller hearth kiln for firing while conveying an article to be fired by a roller, and more particularly to a furnace wall block for forming a furnace wall of a roller hearth kiln through a roller.

[0002]

2. Description of the Related Art In a roller hearth kiln in which a large number of rollers arranged continuously in a furnace chamber are rotated and a product to be fired is baked while being conveyed in the furnace chamber, a mechanism for supporting and driving the rollers is a furnace. Installed outside. For this reason, a large number of holes through which the rollers pass are formed in the furnace wall. Conventionally, a so-called roller tile in which a hole is made in a refractory brick or the like of the same furnace material as that of the furnace material has been incorporated in the roller through hole.
FIG. 4 is a perspective view showing an example of a roller tile incorporated in a furnace wall of a conventional roller hearth kiln. Reference numeral 210 denotes a roller tile.
Is made of refractory bricks of the same quality as the furnace material, and a plurality of through holes 212 are drilled by machining.

[0003]

However, in the above-mentioned conventional structure, the accuracy of the position at which the hole is formed is limited, and the thermal expansion of the furnace or the like causes a deviation from the original design position, so that the roller becomes a through hole. It touches the inner surface. on the other hand,
If the clearance between the roller and the roller is increased by increasing the inner diameter of the roller through hole to avoid this, there is a problem that the strength of the furnace wall provided with the roller through hole is reduced. This problem was particularly remarkable when the roller pitch was short. Therefore, in the present invention, the clearance between the roller and the inner surface of the through-hole can be secured without lowering the strength of the furnace wall , and the assembling can be performed easily and firmly.
And to provide a roller penetrating structure that can structure.

[0004]

Accordingly, claim 1 of the present application is provided.
In order to solve the above-mentioned problems, the invention relates to a roller for transferring and firing an article to be fired in a furnace chamber by supporting and rotating both ends of a plurality of rollers continuously installed in the furnace chamber outside the furnace. A hearth block for forming a hearth kiln wall, comprising a pair of horizontal plates provided in parallel with each other at an interval equal to or greater than the outer diameter of the roller plus a necessary clearance. A plurality of square pipes sandwiched between the pair of horizontal plates and having a horizontal internal dimension and a vertical internal dimension equal to or larger than a size obtained by adding a necessary clearance to an outer diameter of the roller; square pipe of Ri Do a high strength refractory material, each of the plurality of corners on said pair of lateral plates
Multiple recesses for fitting the upper or lower part of the pipe
The depth of the recess is substantially equal to the thickness of the square pipe.
Matched it has to create a furnace wall block of the roller hearth kiln, characterized in Rukoto.

[0005] Here, the high-strength refractory material is a castable refractory, an oxide-based high-strength ceramic containing an oxide such as alumina or silica as a main component, or a non-oxide such as silicon carbide or silicon nitride as a main component. And high-strength refractory materials such as non-oxide-based high-strength ceramics. The necessary clearance is a clearance that does not contact the inner surface of the through hole even when the roller undergoes the maximum rotational shake.

In the invention according to claim 2 of the present application, the object to be fired is transferred in the furnace chamber by supporting and rotating both ends of a plurality of rollers continuously installed in the furnace chamber outside the furnace. A furnace wall block for forming a furnace wall of a roller hearth kiln to be fired, a pair of upper and lower parallel provided at intervals equal to or more than a size obtained by adding a necessary clearance to an outer diameter of the roller. A horizontal plate, and a plurality of vertical plates vertically mounted on the horizontal plate with a gap between the pair of horizontal plates at least equal to the outer diameter of the roller plus a necessary clearance. Then, a block for a furnace wall of a roller hearth kiln, wherein the plurality of vertical plates are made of a high-strength refractory material, was created.

Further, in the above structure, the pair of horizontal
The upper end or lower end of each of the plurality of vertical plates is fitted to the plate.
Preferably, a plurality of concave portions are provided.
3).

[0008]

According to the roller hearth kiln furnace wall block according to the first aspect of the present invention having the above configuration, the roller hearth kiln is vertically arranged at an interval equal to or more than the size obtained by adding the necessary clearance to the outer diameter of the roller. A pair of horizontal plates provided in parallel, and a plurality of corners having a horizontal internal dimension and a vertical internal dimension that are equal to or greater than the size obtained by adding the necessary clearance to the outer diameter of the roller sandwiched between the pair of horizontal plates. A roller through hole is formed by the pipe. Thereby, clearance between each roller and the inner surface of the through hole is secured. In addition, since the plurality of square pipes are made of a high-strength refractory material, the strength of the furnace wall block, which is configured even when the hole wall of the roller through-hole becomes thin in order to secure necessary clearance, increases. In this way, the clearance between the roller and the inner surface of the through hole is secured without reducing the strength of the furnace wall of the roller hearth kiln. Here, a pair of upper and lower horizontal plates are placed on top of a plurality of square pipes.
Alternatively, since there is provided a recess in which the lower part fits,
Easy alignment and assembly of pipes
The square pipe is prevented from shifting from side to side
Structure. Further, the depth of the concave portion corresponds to the thickness of the square pipe.
Since they almost match each other,
The distance between a pair of upper and lower horizontal plates determined in the vertical direction of the square pipe
It is almost the same as the inner dimensions. By this, the adjacent square pie
When the gap between the rollers is used as a roller
The clearance with the inner surface of the through hole is secured to an appropriate size.
You. Therefore, if it becomes easier to design the roller position,
Prevents extra clearance from being provided
You.

In the case of the roller hearth kiln according to the second aspect of the present invention , the roller hearth kiln is provided in parallel with the outer diameter of the roller at an interval equal to or greater than a size obtained by adding a necessary clearance to the roller. A roller through-hole is formed by a pair of horizontal plates and a plurality of vertical plates vertically mounted at intervals equal to or larger than the clearance required for the outer diameter of the roller between the pair of horizontal plates. You. Thereby, clearance between each roller and the inner surface of the through hole is secured. Further, since the plurality of vertical plates are made of a high-strength refractory material, the strength of the furnace wall block, which is configured even if the hole wall of the roller through-hole is made thin in order to secure necessary clearance, becomes high.

[0010] Further, the roller heart ski according to claim 3
In the furnace wall block of Run, a pair of upper and lower horizontal plates
A recess is provided for fitting the upper or lower end of a plurality of vertical plates.
Position and assembly of multiple vertical plates
Easy to do and prevent vertical plates from shifting left and right
The result is a solid structure.

[0011]

Embodiment 1 Next, Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a partial longitudinal sectional view showing one embodiment of a roller hearth kiln incorporating the roller wall kiln block of the present invention. Reference 1
Is a roller hearth kiln. In this roller hearth kiln 1, a furnace chamber 4 is formed by a furnace body 2,
The article 6 to be fired is carried into the furnace chamber 4 and fired by heating a heater (not shown). The furnace body 2 has left and right furnace walls 8a and 8b, and a plurality of furnace wall blocks 10a and 10b are incorporated in the furnace walls 8a and 8b in a horizontal direction (a direction perpendicular to the plane of the paper in the figure). ing.
A plurality of through holes 1 are formed in the furnace wall blocks 10a and 10b.
2a and 12b are provided, and a plurality of pipe-shaped ceramic rollers 20 are inserted into the plurality of through holes 12a and 12b. Due to the rotation of the plurality of rollers 20, the article to be fired 6 is conveyed in the furnace chamber 4 from the opposite side to the front side and fired.

Connecting members 22a and 22b are inserted into both ends of the roller 20 protruding outside the furnace, and shafts 24a and 24b are connected to the connecting members 22a and 22b, respectively. The shafts 24a, 24b are rotatably supported by ball bearings 32a, 34a, 32b, 34b provided on support tables 50a, 50b placed outside the furnace, respectively. Further, the shaft 24
a, a chain wheel 36 is fixed between the ball bearings 32a and 34a, and a chain 38 is engaged below the chain wheel 36. Here, the chain 38 is engaged with all of the plurality of chain wheels 36 attached to the plurality of rollers 20. When the chain 38 moves on the chain rail 40 in a direction perpendicular to the paper surface in the drawing, all the chain wheels 36 rotate, and accordingly, all the shafts 24a, the connecting members 22a, and the rollers 20 are rotated. Rotate.

Therefore, the roller hearth kiln 1 is
A roller hearth kiln that transfers and fires the article 6 to be fired in the furnace chamber 4 by supporting and rotating both ends of a plurality of rollers 20 continuously installed in the furnace outside the furnace. The furnace wall blocks 10a and 10b are furnace wall blocks for forming the furnace walls 8a and 8b of the roller hearth kiln 1. The furnace wall block 10
a, a heat insulating material (not shown)
Are provided so as to surround the periphery of the through hole 12.
a, 12b and the space created between the rollers 20 is closed. Thereby, the roller 20 and the through holes 12a, 12b
While maintaining sufficient clearance between the furnace chamber 4 and the inner wall of the furnace chamber 4.

Next, the structure of the furnace wall blocks 10a and 10b will be described with reference to FIG. FIG. 2 is a perspective view showing the structure of the first embodiment of the furnace wall block of the present invention. Reference numeral 10 denotes a furnace wall block of a roller hearth kiln.
A plurality of roller through holes 12 into which 0 penetrates are provided. The furnace wall block 10 includes an upper plate 14, a lower plate 16,
And a plurality of square pipes 18 sandwiched therebetween. The upper plate 14 and the lower plate 16 are
Are provided in parallel in the vertical direction at an interval equal to or larger than the sum of the outer diameter and the required clearance. In addition, the plurality of square pipes 18 are manufactured so that the shape of the hole is substantially square, so that the inner dimensions in the horizontal direction and the inner dimensions in the vertical direction are almost the same. The horizontal and vertical inner dimensions are equal to or greater than the sum of the outer diameter of the roller 20 and the necessary clearance. And it is fitted and positioned in a plurality of recesses 14 c and 16 c provided in the upper plate 14 and the lower plate 16, and is sandwiched between the upper plate 14 and the lower plate 16.

Here, the vertical depths of the recesses 14c and 16c are formed so as to substantially match the thickness of the square pipe 18. As a result, the distance between the upper plate 14 and the lower plate 16 determined by sandwiching the square pipe 18 becomes substantially the same as the vertical dimension of the square pipe 18. The widths and shapes of the recesses 14c and 16c are substantially the same as the upper and lower portions of the square pipe 18, and the pitch of the recesses 14c and 16c is such that the distance between the adjacent outer walls of the sandwiched square pipe 18 is equal to
Is formed so as to be substantially the same as the inner size in the lateral direction. As a result, all of the plurality of through holes 12 have a square shape having substantially the same internal dimensions, which makes it easier to design the position of the roller 20 and prevents an extra clearance from being provided. Further, the upper plate 14, the lower plate 16, and the square pipe 18 are made of a high-strength ceramic mainly composed of alumina (aluminum oxide), which is a high-strength refractory material and a kind of oxide ceramic. .

Therefore, the upper plate 14 and the lower plate 16 are a pair of horizontal plates provided in parallel with each other at an interval equal to or larger than the clearance of the roller 20 and a plurality of square pipes 18 are formed as a pair. And a plurality of square pipes sandwiched between the horizontal plates 14 and 16 and having a horizontal internal dimension and a vertical internal dimension equal to or greater than the outer diameter of the roller 20 plus the required clearance. The furnace wall block 10 forms a furnace wall block of the roller hearth kiln 1 in which the plurality of square pipes 18 are made of a high-strength refractory material. Further, the pair of horizontal plates 14 and 16 are provided with a plurality of concave portions 14c and 16c into which upper or lower portions of the plurality of square pipes 18 are fitted.

Now, since the furnace wall block 10 has the above-described configuration, a pair of upper and lower parallel members provided at an interval equal to or larger than the outer diameter of the roller 20 plus a necessary clearance is provided. A plurality of corners having a horizontal internal dimension and a vertical internal dimension equal to or greater than the outer diameter of the horizontal plates 14, 16 and the roller 20 sandwiched between the pair of horizontal plates 14, 16 plus a necessary clearance. A plurality of roller through holes 12 are formed by the pipe 18. Thereby, the clearance between each roller 20 and the inner surface of the through hole 12 is ensured. Since the plurality of square pipes 18 are made of alumina-based ceramic which is a high-strength refractory material, the furnace wall block 10 has a structure with high strength. In this way, the clearance between the roller 20 and the inner surface of the through hole 12 is secured without reducing the strength of the furnace wall 8 of the roller hearth kiln 1.

In this embodiment, an example in which a high-strength ceramic mainly composed of alumina (aluminum oxide), which is a kind of oxide ceramic, is used as a high-strength refractory material is described. Oxide-based high-strength ceramics whose main component is oxides of the above.
It is also possible to use a castable refractory or a non-oxide-based high-strength ceramic material mainly containing a non-oxide such as silicon carbide and silicon nitride.

[0019]

Embodiment 2 Next, Embodiment 2 of the present invention will be described with reference to FIGS. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. FIG. 3 is a perspective view showing Embodiment 2 of the furnace wall block. Reference numeral 110
Is a furnace wall block of a roller hearth kiln, and the furnace wall block 110 is provided with a plurality of roller through holes 112 through which the rollers 20 penetrate. The furnace wall block 110 includes an upper plate 114, a lower plate 116, and a plurality of vertical plates 118 interposed therebetween. The upper plate 114 and the lower plate 116 are provided in parallel with each other at an interval equal to or larger than the outer diameter of the roller 20 plus a necessary clearance. In addition, a plurality of vertical plates 11
8 is fitted and positioned in a plurality of recesses 114 c and 116 c provided at a constant pitch in the upper plate 114 and the lower plate 116, and is held between the upper plate 114 and the lower plate 116.

Here, the vertical depth and the horizontal pitch of the recesses 114c and 116c are determined by sandwiching the vertical plate 118 and the upper plate 114 and the lower plate 116.
Are formed so that the interval between them is almost the same as the interval between adjacent vertical plates 118. Thereby, the plurality of through holes 11
2 are all squares having substantially the same internal dimensions, which makes it easier to design the position of the roller 20 and prevents extra clearance from being provided. Further, the upper plate 114, the lower plate 116, and the vertical plate 118 are made of a high-strength ceramic mainly composed of silicon carbide, which is a high-strength refractory material and a kind of non-oxide ceramics.

Therefore, the upper plate 114 and the lower plate 116 are
A pair of horizontal plates are provided in parallel with each other at an interval equal to or larger than the clearance of the roller 20 and a plurality of vertical plates 118 are provided between the pair of horizontal plates 114 and 116. And a plurality of vertical plates which are vertically attached to the horizontal plates 114 and 116 with an interval of at least the size obtained by adding the necessary clearance to the vertical plates. And the furnace wall block 110
Constitutes a furnace wall block of the roller hearth kiln 1 in which a plurality of vertical plates 118 are made of high-strength ceramics whose main component is silicon carbide, which is a high-strength refractory material. Further, a plurality of vertical plates 11 are provided on the pair of horizontal plates 114 and 116, respectively.
8, a plurality of recesses 114c into which the upper end or lower end fits,
116c is provided.

Now, since the furnace wall block 110 has the above-described configuration, a pair of upper and lower parallel members provided at an interval equal to or greater than the outer diameter of the roller 20 plus a necessary clearance is provided. The horizontal plates 1 and 1 are spaced apart from each other by a distance equal to or greater than the clearance required for the outer diameter of the roller 20 between the pair of horizontal plates 114 and 116.
Plural vertical plates 1 vertically mounted on 14, 116
18, a plurality of roller through holes 112 are formed. Thereby, the clearance between each roller 20 and the inner surface of the through hole 112 is secured. And a plurality of vertical plates 11
8 is made of a silicon carbide-based ceramic which is a high-strength refractory material, so that the furnace wall block 110 has a high-strength structure. Thus, the furnace wall 8 of the roller hearth kiln 1
Roller 20 and through-hole 11 without reducing the strength of
The clearance with the inner surface of No. 2 is secured.

In this embodiment, an example is shown in which a high-strength ceramic mainly composed of silicon carbide, which is a kind of non-oxide ceramics, is used as a high-strength refractory material. Non-oxide-based high-strength ceramics mainly composed of non-oxide may be used. It is also possible to use castable refractories or oxide-based high-strength ceramic materials mainly composed of oxides such as alumina and silica. Also, the plurality of recesses 114c, 116c into which the upper or lower ends of the plurality of vertical plates 118 provided on the pair of horizontal plates 114, 116 are not necessarily required.

In each of the above embodiments, a driving device using a chain and a chain wheel is used as the roller driving method of the roller hearth kiln, but various driving methods are also conceivable. Regarding the structure, shape, size, arrangement, etc. of other parts of Roller Heart Kiln,
It is not limited to each embodiment.

Furthermore, the following effects are unique to each of the above embodiments: (1) Since not only the square pipe and the vertical plate but also the pair of upper and lower horizontal plates are made of a high-strength refractory material, the strength becomes higher. 2) The use of a square pipe in the first embodiment and the use of a flat plate in the second embodiment make the production easier and reduce the cost. (3) The plurality of through-holes are all squares having almost the same internal dimensions. (4) The use of high-strength alumina-based ceramics reduces the dimensional accuracy of each component. The clearance between the roller and the inner surface of the through-hole can be improved even if the inner dimension of the through-hole is minimized (even if the hole wall is thickened) because of the improved and more accurate positioning of the roller and the through-hole. Surely kept ,
Such advantages can also be obtained.

[0026]

[Effects of the Invention] In the present invention, a block for a furnace wall of a roller heart kiln in which a vertical hole wall of a square roller through hole is made of a high-strength ceramic or the like was created.
The clearance between the roller and the inner surface of the through hole can be secured without reducing the strength of the furnace wall. This provides a practical roller hearth kiln furnace wall block with high strength and no risk of roller contact.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view showing an embodiment of a roller hearth kiln incorporating a furnace wall block of the roller hearth kiln of the present invention.

FIG. 2 is a perspective view showing Embodiment 1 of the furnace wall block of the present invention.

FIG. 3 is a perspective view showing Embodiment 2 of the furnace wall block of the present invention.

FIG. 4 is a perspective view showing a conventional example of a furnace wall block of a roller hearth kiln.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Roller hearth kiln 4 Furnace room 6 Article to be fired 8 Furnace wall 10 Block for furnace wall 14, 16 Horizontal plate 14c, 16c Concave part 18 Square pipe 20 Roller

Claims (3)

(57) [Scope of request for utility model registration] 1. A furnace wall of a roller hearth kiln for transferring and firing an article to be fired in a furnace chamber by supporting and rotating both ends of a plurality of rollers continuously installed in the furnace chamber outside the furnace. A pair of horizontal plates provided in parallel with each other at an interval of at least a size obtained by adding a necessary clearance to the outer diameter of the roller, and a space between the pair of horizontal plates. And a plurality of square pipes having a horizontal inner dimension and a vertical inner dimension equal to or larger than a size obtained by adding a necessary clearance to the outer diameter of the roller, wherein the plurality of square pipes have high strength fireproof. Ri Do from sexual material, there each top of the plurality of square pipes to the pair of lateral plates
Or a plurality of recesses into which the lower portion fits.
Roller hearth kiln furnace wall block depth section is characterized that you have substantially matches the thickness of the square pipe. 2. A plurality of rows continuously installed in a furnace chamber.
By supporting and rotating both ends of the
Roller hearth kiln for transferring and firing the fired product in the furnace chamber
A furnace wall block for forming a furnace wall of the size of the roller, in which a necessary clearance is added to an outer diameter of the roller.
A pair of horizontal plates provided in parallel with each other at the above intervals
And a clearance required between the pair of horizontal plates for the outer diameter of the roller.
At a distance equal to or greater than the
Having a plurality of vertical plates mounted vertically, wherein the plurality of vertical plates are made of a high-strength refractory material.
Roller hearth kiln furnace wall blocks. 3. The plurality of vertical plates are respectively provided on the pair of horizontal plates.
The upper or lower end of the
The block for a furnace wall of a roller hearth kiln according to claim 2, wherein: