JPS6340797Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is applicable to side plates, liners,
The present invention relates to a cast plate for shielding high heat, such as doors, dampers, etc., which is used to shield high heat and prevent overheating of peripheral equipment, equalize temperature inside the furnace, and prevent thermal energy loss.

[Prior art] Generally, side plates, liners, doors,
A cast plate formed by casting is used as a high heat shielding plate used in a damper or the like. However, in this type of cast plate for high heat shielding,
Since the surface of the plate is directly exposed to high temperatures and heating and cooling are repeated, there is a problem that the plate is easily destroyed due to concentration of thermal stress. Conventionally, as shown in FIG. 1, a lattice-shaped reinforcing rib 2' was provided on the back surface of a plate-shaped base 1 to avoid concentration of thermal stress.

[Problem to be solved by the invention] By using lattice-shaped reinforcing ribs 2', it is possible to avoid concentration of thermal stress in one place, but it is possible to avoid stress at each intersection of the reinforcing ribs 2'. becomes concentrated. The smaller the angle of the intersection of the reinforcing ribs 2', the greater the stress concentrated at the intersection. Therefore, if heating and cooling are repeated and breakage occurs at the intersection of the ribs, a notch effect will occur to a large extent, and the cast plate will inevitably be destroyed in a short period of time.

An object of the present invention is to provide a cast plate for high-temperature shielding that has higher strength than before and can extend its service life.

[Means for Solving the Problems] The cast plate for high heat shielding of the present invention will be explained based on the embodiment shown in FIG. 2. A reinforcing rib 2 consisting of a combination of hexagons is integrally provided.

[Function] By doing this, the angle of the intersection of the ribs becomes as large as 120 degrees, and the stress concentrated at the intersection can be made smaller than before, and compressive and tensile forces in all directions, not just the vertical and horizontal directions, can be reduced. The plate-shaped base 1 can be strengthened. Moreover, since the total length of the reinforcing ribs 2 is increased and the heat dissipation area of the reinforcing ribs is increased, a cooling effect superior to that of conventional products can be obtained.

[Example] The present invention will be explained in detail below with reference to the illustrated example.

In the embodiment shown in FIG. 2, reinforcing ribs 2 consisting of hexagonal combinations are provided on the back surface of the plate-shaped base 1 on the low temperature side.
are cast in one piece. In this way, reinforcing rib 2
, the plate-like base 1 resists compressive and tensile forces not only in the longitudinal and lateral directions but also in all directions.
As a result, the strength of the cast plate for high heat shielding can be significantly increased compared to conventional methods.

In addition, by combining the reinforcing ribs 2 into a hexagonal shape, the heat dissipation area of the reinforcing ribs can be increased, which improves the cooling effect compared to conventional products in which the reinforcing ribs are formed in a lattice shape. I can do it.

In the pattern of the reinforcing ribs 2 as shown in FIG. 2, nests are likely to form at the intersections of the ribs forming each side of the hexagon. In order to avoid this, as shown in FIG. 3, it is preferable to form a cylindrical portion 3 having a cavity around the intersection, and form the ribs so that the thickness t is the same at the intersection.

Next, experimental results will be shown in which the high heat shielding cast plate according to the present invention was used as a high heat shield plate for various devices.

(A) Bottom plate for coke fire extinguishing vehicle (Material: Spheroidal graphite cast iron FCD-45) Under operating conditions, the front surface is heated to a high temperature by the red-hot coke discharged from the coke oven, and the back surface is heated to a low temperature by being sprayed with fire extinguishing water. exposed. If heating and cooling are repeated under these usage conditions,
Conventional products had a service life of 6 months to 1 year, but the product according to the present invention could extend the service life to 2 to 3 years.

(B) Side plate (part of the equipment for manufacturing pellets, a raw material for steelmaking, material: high nickel chrome heat-resistant steel cast steel SCH20) The operating conditions are that the front surface is heated to approximately 900℃, and the back surface is exposed to low-temperature air. It will be done. When heating and cooling are repeated under such usage conditions, conventional products have a service life of 3 to 6 months, but the product of the present invention can extend the service life to more than 2 years. was completed.

(C) Pallet side plate (part of the equipment for producing sintered ore, a raw material for iron making, material: spheroidal graphite cast iron product FCD-45) The usage conditions are the same as in the case of (B) above, where the surface is approximately
It is heated to 900℃, and the back side is exposed to cold air.
When heating and cooling are repeated under such usage conditions, conventional products have a service life of 1 to 1.5 years, but the product of this invention has a service life of 2 to 3 years. It could be extended to a year.

(D) Heating furnace door and damper (Material: High chromium nickel heat-resistant steel casting SCH13) The usage conditions are that the surface of the heating furnace door is 900
℃~1200℃, the back side is exposed to low temperature indoor air, and the front side of the damper is heated to 400℃~500℃
The back side is similarly exposed to low-temperature air. When heating and cooling are repeated under such usage conditions, conventional products have a service life of approximately 2 years, but with the product of this invention, the service life has been extended to 3 to 4 years. We were able to.

[Effects of the invention] As described above, according to the invention, reinforcing ribs consisting of hexagonal combinations are integrally formed on the back surface of the plate-shaped base, so that the angle of the intersection of the reinforcing ribs can be increased. The plate-like base can be strengthened against compressive and tensile forces in all directions, not just the longitudinal and transverse directions. Moreover, since the total length of the reinforcing ribs is increased, the heat dissipation area is increased and a cooling effect superior to that of conventional products can be obtained, which has the advantage of significantly extending the service life.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the ribs of a conventional product;
The figure is a plan view showing the ribs of the product according to the present invention.
The figure is an explanatory diagram of a rib pattern showing a modification of the present invention. 1...Plate-shaped base, 2...Reinforcement ribs.

Claims (1)

[Scope of utility model registration request] A cast plate for high heat shielding, characterized in that reinforcing ribs consisting of a combination of hexagons are integrally provided on the back surface on the low temperature side of a plate-shaped base whose surface is directly exposed to high temperatures.