JPS602428Y2 - Device to prevent contaminants from being drawn into incinerators - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a device for preventing foreign matter from being drawn into a mechanical incinerator having reciprocating motion.

BACKGROUND ART Conventionally, a drawing-in prevention plate has been provided at the interface between a movable part and a fixed part of a mechanical incinerator having reciprocating motion to prevent foreign matter from being drawn in.

The retraction prevention plate of the conventional structure requires an attachment means such as a shaft to prevent the movable part from falling off during reciprocating motion, and since the number of parts is large, it takes considerable effort to attach and detach. There was a problem.

In addition, with conventional draw-in prevention plates, the air sealing function at the mounting part is insufficient, so some of the combustion air supplied from below the grate enters the combustion chamber from the mounting part, and from each grate. There was also the problem that it became difficult to maintain normal blowing of air into the combustion chamber, resulting in a reduction in the combustion performance of the incinerator.

The object of the present invention is to provide a new and useful device for preventing foreign matter from being drawn into an incinerator having a movable grate, which eliminates the above-mentioned conventional drawbacks.

The present invention consists of a pull-in prevention plate having an arc-shaped inner surface with a notch, and a regular square cross-sectional member that is fixed above the movable grate and inscribed in the arc-shaped inner surface, and the pull-in prevention plate is arranged in the The square cross-sectional member is made detachable as a fixed shaft, and the relationship between the square cross-sectional member and the pull-in prevention plate is as follows: A<B (A is extremely slightly smaller than B) C>D A>C However, A is the diagonal side dimension of the regular square cross-sectional member, B is the diameter of the arc-shaped inner surface of the pull-in prevention plate, C is the dimension of the notch of the pull-in prevention plate, and D is the dimension of each side of the square cross-sectional member. A device for preventing foreign matter from being drawn into an incinerator, characterized in that the dimensions satisfy the following.

An embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the foreign matter drawing-in prevention device includes a drawing-in prevention plate 1 (hereinafter abbreviated as prevention plate 1 unless necessary). It consists of a square bar 2 as the regular square cross-sectional member.

The prevention plate 1 has an arc-shaped inner surface having a notch at its upper end, and can smoothly rotate around the square bar 2 as a fixed axis while circumscribing the square bar 2.

On the other hand, the square bar 2 is fixedly disposed above the movable grate 3, and its cross-sectional shape is a regular quadrangle, its two sides are parallel to the upper contour line of the movable grate 3, and the lower end of the prevention plate 1 is It maintains contact with the upper surface of the movable grate 3 due to its own weight.

Note that the square bar 2 may be slightly inclined with respect to the horizontal plane,
The point is that the lower end of the prevention plate 1 should be able to evenly contact the upper surface of the movable grate 3.

Now, to explain the relationship between the prevention plate 1 and the square bar 2 inscribed therein, the diagonal side dimension A of the square bar 2 is very slightly smaller than the diameter B of the arcuate inner surface of the prevention plate 1, and the prevention plate The notch dimension C of 1 is sufficiently larger than the side dimension of the square bar 2, and the diagonal side dimension A is sufficiently larger than the notch dimension C.

That is, A<B (almost equal) (1) C>D (2) A > C (31 It is.

In addition, in Fig. 1, 4 is a fixed grate, 5 is an incinerator, and 6 is a fixed grate.
is a furnace wall, and 7 is a combustion chamber.

Thus, during operation of the incinerator, the materials to be incinerated are placed in the vicinity of the prevention plate 1, moved by the reciprocating motion 6 of the grate, and incinerated.

At this time, the material to be incinerated on the movable grate 3 is pushed out by the prevention plate 1.

In this way, the prevention plate 1 acts to supply the material to be incinerated by falling through the reciprocating movement of the movable grate 3, but during this time, the square rod 2 is inscribed in the prevention plate 1, and the prevention plate 1
Since the lower end remains in contact with the upper surface of the movable grate, air leakage from the prevention plate 1 into the combustion chamber 7 is accurately prevented.

On the other hand, during the reciprocating movement of the movable grate 3, a force parallel or nearly parallel to the diagonal side direction of the square rod 2 does not act on the prevention plate 1. As is clear from equation (3), since the prevention plate 1741 hardly moves in any of the diagonal directions, the prevention plate 1 will not come off the square rod 2 and fall off.

Next, when the prevention plate 1 is removed from the square rod 2 when the incinerator 5 is stopped, or when the removed prevention plate 1 is assembled into the square rod 2, the notch of the prevention plate 1 is removed as shown in FIG. When the prevention plate 1 is rotated so that the square bar 2 faces almost straight down, the horizontal dimension of the square bar 2 is always uniform, and <C>D as in equation (2) above. The prevention plate 1 can be easily removed by moving it directly upward.

When assembling the prevention plate 1 into the square bar 2, the reverse operation may be performed.

In this way, the square bar 2 can be easily
The prevention plate 1 can be attached to and detached from the plate.

In the above embodiment, the cross-sectional shape of the square bar 2 is square, but at least one of the three apex portions may be arc-shaped.

Further, the inner surface shape of the prevention plate 1 does not necessarily have to be arcuate as a whole, and the vicinity of the notch can also be linear.

As described above, according to the present invention, the retraction prevention plate can be easily attached to and detached from the member having a square cross section by an extremely simple operation without using any attachment means such as bolts, nuts, or shafts. These have the advantage that they are simple and inexpensive to manufacture, have sufficient air sealing effects and foreign matter prevention effects, and can maintain accurate and stable combustion of dust and the like.

The device of the present invention can be applied to the movable grate at the forefront of each of the drying zone, combustion zone, and post-combustion zone of a complete incinerator.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and Fig. 1 is a partial vertical sectional view showing how the device for preventing foreign matter from being drawn in is installed in the incinerator, and Fig. 2 shows how the device for preventing foreign matter from being drawn in is used and how it is connected to the drawing-in prevention plate. FIG. 3 is a vertical cross-sectional view showing the inscribed state of the square rod, and FIG. 3 is a vertical cross-sectional view showing the procedure for attaching and removing the pull-in prevention plate. 1... Pull-in prevention plate, 2... Square bar, 3.
...Movable grate, 4...Fixed grate, 5
...Incinerator, 6...Furnace wall, 7...
... Combustion chamber.

Claims (1)

[Claims for Utility Model Registration] The draw-in prevention plate is composed of a pull-in prevention plate having an arc-shaped inner surface with a notch, and a square cross-sectional member fixedly installed above the movable grate and inscribed in the arc-shaped inner surface; The plate is detachable using the square cross-sectional member as a fixed axis, and the relationship between the square cross-sectional member and the pull-in prevention plate is A<B (A is extremely slightly smaller than B)C> D A>C However, A is the diagonal side dimension of the regular square cross-sectional member, B is the diameter of the arcuate inner surface of the pull-in prevention plate, C is the dimension of the notch of the pull-in prevention plate, and D is the square cross-sectional member A device for preventing foreign matter from being drawn into an incinerator, characterized in that each side of the device satisfies the following.