FI121285B - Grills Construction - Google Patents

Description

This invention relates to a grate structure and more particularly to a grate structure used in wood or similar fuel furnaces.

The grate is traditionally made up of either a substantially flat bottom of the furnace or often a substantially uniform piece of cast iron but with holes or gaps, usually underneath, for example in a sauna stove and the like, an ash box that drips and may be emptied from time to time.

Obviously, if the grate is a mere solid masonry surface, the effect of the grate on the combustion event is quite negligible, in fact, it is even negative, since no air promoting combustion can be conducted through the 15 solid structure without separate tubular or similar structures.

A separate cast iron or similar grate structure is superior to the above structure in that combustion air easily passes through the grate. The amount of combustion air can often be influenced by opening and closing the ash hatch.

The object of the present invention is to provide a grate structure which can further improve the combustion process and also provide advantages in terms of wood ash and the behavior of the ash produced.

25

The foregoing and other advantages and advantages of the present invention are achieved as set forth in the appended claims.

The invention will now be described in more detail with reference to the accompanying drawings, in which;

Fig. 1 is an axonometric view of an embodiment of a grate according to the invention; 2

Figure 2 is a side view of the grate structure of Figure 1; and

Figure 3, in turn, shows the grate structure viewed directly from its end.

5 All three patterns can be viewed at the same time. Thus, the grate 1 consists of a substantially corrugated sheet metal 2. This shape is clearly shown in Figure 3. The folds of the wave are relatively steep. However, it goes without saying that the waveform can be modified as needed. For example, if a baseplate is used which is intended to be made of multiple widths of arino, the waveform attenuation will result in an increase in overall width. Changing the shape of the wave while staying within certain criteria is not a critical feature of the invention.

The wavy shape is conventionally made up of the shark 2 of the wave and the bottom 3 of the wave 15.

It is clear from the figures that both the wave crest 2 and its base 3 are perforated. In this particular embodiment, the bottom 3 of the wave is perforated by 20 relatively large openings 4. As the ash and other combustion slag tends downward and thus toward the bottom of the wave, the large hole bottom allows it to fall freely down into the ash box or the like. The wave brush is also provided with holes 5 which are clearly smaller than the holes 4 in the bottom. The third type of holes 6 is on the flanks of the wave. These are because of the desire to avoid larger solid surfaces.

25

When the trees are placed in the oven on the grate, their contact surface with the grate 1 remains quite small. Thus, there is a large amount of ignition surface and there are few surfaces which are tight against the air impermeable surface. The supply of air at the time of ignition as well as during the fire event is unhindered, which means that the trees not only ignite well over 30 large areas but also burn well and efficiently.

An effective fire event also means pure combustion. The ash is also formed uniformly and effectively discharged by the grate according to the invention. Thanks to the small contact surface, there is no bad burn between the trees and the grate.

3

In addition, the wood burned by the grate according to the invention has the property of moving as the combustion progresses, since there is a certain amount of rolling in the combustion chamber due to the undulating nature of the grate.

5 As mentioned, it is easy to make gratings of different widths by changing the angles and side lengths of the same starting piece.

The perforations can be round or oval or any shape if desired. They may be transverse, longitudinal or obliquely disposed with respect to said directions 10.

Many modifications to the basic concept are possible. The material of manufacture is especially an iron plate.

Claims (3)

Grating structure (1) consisting of substantially disc-shaped metal and which is substantially road-shaped in intersection and comprises heels / openings (4, 5) in the area of both the road valley (3) and the core (2), characterized in that the holes / openings (4) in the region of the road valley (3) are substantially larger than the holes / openings (5) in the area of the road comb (2). Grating structure according to claim 1, characterized in that there are also 10 heels / openings in the area of (6) the road sides. 3. A grid structure according to claim 1, characterized by the shape of the path (2, 3) of the construction structure and / or the length of its side can be varied to change the width of the structure.