JPH0245623Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a grate for a furnace for incinerating materials that flow during incineration, such as plastics and ferric acid soda.

(B) Conventional technology Conventionally, a grate that has one block in the direction perpendicular to the direction of flow of waste, that is, in the row direction, has a fixed part 20, a movable part 21, and a common grate 22, as shown in FIGS. 8 and 9. The mating surfaces 23 were mechanically finished and tightened with tie rod bolts 24 so that there would be no gap between the grate 22 and the adjacent grate 22. If there are gaps between adjacent grates, when resins such as ferrous soda or plastic are incinerated, they will melt and flow due to the heat, and instead of being incinerated, they will fall through the gaps between the grates. In order to prevent this phenomenon, as mentioned above, the mating surfaces 23 of adjacent fire grates are finished by machining.
The bolts were tightened to create a structure with no gaps. In addition, in order to line up and tighten the grates, the inner surface 25 of the brackets and the surface 26 for attaching the brackets and the grates were machine finished to improve dimensional accuracy and facilitate assembly, requiring a large number of parts.

Others have assembled grate devices by combining grate shapes of multiple types.

(c) The problem that the idea aims to solve The conventional grate had the following problems.

Since the grate 22 is assembled in conjunction with the bracket 25, the bolts that tighten the grate 22 and the bracket 25, the tie bolt 24, etc., the mating surface 23 of each grate, the inner surface 25 of the bracket,
The mounting surface 26 must be machined. In other words, the number of parts is large, and many parts require machining, leading to high costs.

It required time-consuming assembly techniques to assemble and tighten bolts for one horizontal row.

During repairs, one row of bolts had to be tightened, making repairs time-consuming.

Since the grate uses many assembly bolts, it has been difficult to increase the cooling area of the grate. As a result, the temperature of the grate became high, causing it to wear out quickly and shortening its lifespan.

Plastics and other resins that flow while burning on the grate stick to the grate and burn, making it difficult to burn.

Since the grate device was assembled by combining grate shapes of a plurality of types, it was necessary to manufacture grate grate shapes of a plurality of types.

The present invention aims to solve the above problems and provide a low-cost grate.

(d) Means for solving the problem A stepped part is provided on one side of the grate, an overlapping part is provided on the other side, and the stepped part and the overlapping part are connected to the horizontally adjacent grate through a gap. The grate is arranged in an overlapping arrangement, with mounting parts for fitting into the bearing shaft located inward from both sides of the back side of the grate by the width of the overlapping part, and further inward for cooling at a position an appropriate distance away. The grate has a one-piece structure with abutment parts arranged at the lower front of the grate, and the bearing shafts installed on the fixed frame and the bearing shafts installed on the movable valve are arranged alternately from the front to the rear. The structure is such that the grate mounting part is fitted into the bearing shaft in order from the front.

(E) Effect The structure is such that horizontally adjacent fire grates have stepped sections on the sides and are overlapped with a gap between them, so that when incinerating resins such as sodium ferrate and plastics, these substances are When the molten substance flows and flows into the steps provided on the side of the grate, the steps are cooled by the air flowing in from below, so the resin is also slightly cooled, making it extremely difficult to flow. Therefore, it will not fall. In addition, there are two types of grates: those that belong to fixed parts and those that belong to movable parts.
As the movable part periodically reciprocates back and forth, a small gap is created between the steps, and the resin etc. that leaked into the step 15 is gradually removed by the heat of the garbage incineration and the air flowing through the small gap. Burn. The mounting part of the grate is fitted into the bearing shaft, and when the movable frame is moved back and forth, the grate follows. The abutting part of the grate slides on the upper surface of the grate in front, which has the effect of peeling off fluid stuck to the upper surface of the grate and promoting the combustion of the resin. There are cooling fins 11 at the lower part of the inner surface of the grate, which also have the effect of dissipating heat and cooling. This has the effect of lowering the temperature of the grate and reducing wear and tear.

(f) Examples Embodiments of the present invention will be described based on the drawings.

FIG. 1 is a front view of the entire grate, and FIG. 2 is a plan view. The grate device 1 consists of a fixed part 2 that is fixed and does not move, a movable part 3 that reciprocates back and forth (left and right in FIG. 3) by a drive device 4, and a drive device 4 that makes the movable part 3 reciprocate. The movable part 3 is composed of a plurality of movable blocks 8 and a movable frame 7 which is provided so as to be able to reciprocate on a pedestal 9. The movable block 8 is a bearing shaft 12
It consists of a plurality of fire grates 10 fitted onto the top, a bearing shaft 12, and a plurality of metal fittings 14 that support the bearing shaft 12. A plurality of guide plates 13 are attached to the receiving shaft 12 in order to prevent the grate 10 from moving in the longitudinal direction of the shaft. The grate 10 has a step 15 on one of its sides,
It has an overlapping portion 16 on the other side. In addition, a contact portion 18 is provided at the lower front portion (left side in FIG. 5) of the fire grate 10.
The corresponding contact portion 18 comes into contact with the upper surface of the fixed block (the grate located one row below (lower left side in FIG. 3)) 6. It has a ring-shaped attachment part 17 at the lower part of the rear (right side in FIG. 5), and is structured to fit into the receiving shaft 12. A cooling fin 11 is provided at a position a suitable distance inward from the mounting portion 11. This cools the tank and radiates heat through the grate to prevent the temperature from rising. Further, the fixed part 2 includes a fixed frame 5 that does not move and a fixed block 6 provided on the fixed frame 5. The fixed block 6 has the same structure as the movable block 8, but the difference is that the frame to which it is attached is the fixed frame 5.

Since the grate of the present invention has the above-described structure, it is made by casting, and requires no special machining except for deburring. That is, the gap 19 is set appropriately, and the gap between the portion of the mounting portion 17 that is fitted into the receiving shaft 12 and the receiving shaft 12 and the outer diameter is provided appropriately,
Furthermore, in order to prevent lateral displacement, a guide plate 13 is provided on the receiving shaft, and a gap between the receiving shaft guide plate 13 and the mounting portion 17 is set appropriately. As a result, the grate gap 1
9 can be maintained at an appropriate level, so the resin will not melt and flow out under the grate.

(g) Effects of the invention This invention has a structure in which a stepped portion is provided between adjacent horizontal grate, and they are overlapped with a gap between them.
By making the grate one-piece structure and one type of mold, the total number of parts has been significantly reduced. Thereby, there is no need to finish the grate by machining as in the conventional case. Therefore, the labor of machining is eliminated, and the labor of assembly work can be significantly reduced. Since bolts are not tightened, advanced assembly techniques are not required. Furthermore, since the grate is not machined and is used as a black shell, and the structure of the grate is an integral structure, cooling fins can be provided to promote cooling, reducing wear and tear, and preventing fires. Another effect is that the life of the lattice is extended.

[Brief explanation of the drawing]

Figure 1 is a front view of the grate device. Figure 2 is a plan view. Figure 3 is a right side view of the grate device. Figure 4 is an enlarged view of a portion of the row of fire grates in Figure 3, viewed from above. FIG. 5 is an AA view of FIG. 4. Figure 6 is B of Figure 5.
-B sectional view. FIG. 7 is a CC view of FIG. 8th
9 and 9 are views showing the prior art, and FIG. 8 is a right side sectional view of the grate device. FIG. 9 is a sectional view taken along line DD in FIG. 8. 10...Grate, 11...Fin, 15...Step part, 16...Overlapping part, 19...Gap.

Claims (1)

[Scope of utility model registration request] A grate for a furnace for incinerating substances that flow during incineration, wherein one side of the grate is provided with a stepped portion, the other side is provided with an overlapping portion, and horizontally adjacent grate;
The stepped part and the overlapping part are arranged in an overlapping manner with a gap in between, and mounting parts for fitting into the bearing shaft are provided at positions that are moved inward from both sides of the back side of the grate by the width of the overlapping part, and further inward. Cooling fins are arranged at appropriate distances, and the grate has a one-piece structure with a contact part at the front lower part of the grate, and a bearing shaft is installed on the fixed frame and a bearing shaft is installed on the movable frame. Alternately arrange them from the front to the back, and from the front to the receiving shaft,
A fire grate characterized by having a structure in which a mounting part of the fire grate is fitted.