JPH0325115Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to inter-row bricks of a tunnel furnace, which are arranged between rows of bed plates in a tunnel furnace for firing soft ferrite, for example.

<Prior Art> As a tunnel furnace for firing soft ferrite, for example, the one described in Japanese Patent Publication No. 48-27169 is well known, in which a plurality of furnace zones divided in the longitudinal direction are provided inside the furnace, and each zone is divided into two zones. The desired temperature range is created inside the furnace by controlling the atmosphere.

Pusher-type tunnel furnaces are known for moving workpieces in tunnel furnaces, in which a number of bed plates carrying workpieces are sequentially pushed into the tunnel furnace, and the transfer speed of the bed plates and the length of the tunnel furnace are adjusted. After a predetermined thermal processing time defined by the thickness, the fired product is obtained on the base plate emerging from the outlet end.

In order to process a large number of workpieces, a device in which a plurality of rows of bed plates are arranged in parallel and each row of bed plates is moved simultaneously is also used.

<Problem to be solved by the invention> In a pusher-type tunnel furnace that uses multiple rows of bed plates, it is attempted to create a desired temperature range inside the furnace by providing multiple furnace zones and controlling the atmosphere in each zone. In this case, there is a problem in making the atmosphere inside the furnace zone uniform.

The object of the present invention is to provide inter-row bricks for a tunnel furnace that can make the atmosphere inside the furnace zone uniform in such cases.

<Means for Solving the Problems> According to the present invention, there is provided a central protrusion that protrudes upward, and a base plate support that extends symmetrically to the left and right of the central protrusion and at a position lower than the upper surface of the central protrusion. Department and
and a shielding plate support part extending symmetrically to the left and right of the base plate support part and at a position lower than the upper surface of the base plate support part, opening on the upper surface of the central protrusion part and spaced apart in the longitudinal direction. Provided is an inter-row brick for a tunnel furnace, characterized in that it is provided with a plurality of vertical through holes.

<Function> Since atmospheric gas can be introduced between the rows of base plates through the vertical through holes, the atmosphere can be made uniform, and since it is possible to arrange a shielding plate below the base plates, the Deformation and damage to the plate can be minimized, and the life of the base plate can be extended.

<Example> FIG. 1 shows a cross-sectional view of an inter-row brick 1 according to the present invention, and the brick 1 has a central protrusion 2 that protrudes upward;
A base plate support part 3 extends symmetrically to the left and right of the central protrusion 2 and at a position lower than the upper surface 2a of the central protrusion.
and a shielding plate support part 4 that extends symmetrically to the left and right of the base plate support part 3 and at a position lower than the upper surface 3a of the base plate support part, and has a longitudinal side opening on the upper surface 2a of the central protrusion part 2. A plurality of vertical through holes 5 are provided at intervals in the direction (perpendicular to the plane of the drawing). In addition, in FIG. 1, a recess 6 is provided in the lower surface of the brick 1 in order to smooth the gas flow to the through hole 5.

FIG. 2 shows a schematic cross-sectional view of the atmosphere control zone of the tunnel furnace using the bricks of FIG. In the figure, two rows of bedplates 10, 11 move in parallel in the tunnel furnace, their adjacent edges supported by bricks 1, and their distant edges supported by bricks 8, 9, respectively. Ru. Shielding plates 12 and 13 are supported below base plates 10 and 11 by bricks 1 and 8 and bricks 1 and 9, respectively. Although the shielding plates 12 and 13 do not move, the base plates 10 and 11 are moved in a direction perpendicular to the plane of the paper by a pusher device (not shown). The shielding plates 12 and 13 prevent the lower surfaces of the base plates 10 and 11 from being damaged or deformed due to heat.
Extend the life of the base plate.

In Fig. 2, the arrows indicate the flow paths of atmospheric gas, and in addition to feeding from the left and right directions as shown in A and B, according to the present invention, feeding from between the columns as shown in C is possible. Gas flows A and B are connected to the base plates 12 and 13.
The atmosphere in the inter-row area due to the obstruction by the upper workpieces 14, 15 is improved and as a result a homogenization of the atmosphere is achieved.

Note that in the figure, D indicates the flow of exhaust gas.

<Effects of the Invention> According to the present invention, atmospheric gas can be introduced between the rows of base plates through the vertical through-holes, so that the atmosphere can be made uniform.

Furthermore, it is desirable to dispose a shielding plate below the base plate, thereby minimizing deformation and damage to the base plate and extending the life of the base plate.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a brick according to the present invention, and FIG. 2 is a cross-sectional view of a tunnel furnace using the brick according to the present invention. 1: Brick between rows, 2: Center protrusion, 2a: Top surface of center protrusion, 3: Base plate support, 3a: Top surface of base plate support, 4: Shield plate support, 5: Vertical through hole, 10, 11: Base plate 10, 11, 12, 13:
Shielding plate, 14, 15... workpiece on base plate, A,
B, C...flow of feed gas, D: flow of exhaust gas.

Claims (1)

[Scope of utility model registration request] a central protruding portion that protrudes upward; a base plate support portion that extends symmetrically to the left and right of the central protrusion and below the upper surface of the central protrusion; and a base plate support that extends symmetrically to the left and right of the base plate support portion and a shielding plate support portion extending at a position lower than the top surface of the base plate support portion, and a plurality of vertical through holes opened at the top surface of the central protrusion and spaced apart in the longitudinal direction. Bricks between rows of tunnel furnaces featuring