JPH04186010A - Rear part seal device of fire grate - Google Patents

Abstract

PURPOSE:To prevent abnormal combustion by comprising a heat resistant metallic material which is inclined downward at a lower stage fire grate below a drop wall of an upper stage fire grate, a seal-metallic material which may freely oscillate at the rear end of the upper stage fire grate and rest on the lower stage fire grate at its tip, and a seal-plate which comes into contact with the lower end. CONSTITUTION:A heat resistant metallic material 8 which is inclined downward at a lower stage fire grate is mounted to the bottom of a ceiling frame 11 of the lower stage fire grate under the drop wall 7 of an upper stage fire grate. A seal metallic material 8 is laid out to the rear end of the upper stage fire grate so that it may oscillate freely, allowing its tip 9b to rest on a movable fire grate 1 of the lower stage fire grate in the lower part of the heat resistant metallic material 8. Furthermore, a seal-plate 10 is vertically installed to the bottom of a ceiling frame 11 where the lower end is arranged to come into contact with the side of an offset section 9c on the top of a seal-metallic material 9. This construction makes it possible to prevent the heat resistant metallic material from carrying back refuse, seal combustion air with the seal-metallic material 9 and the seal-plate 10, thereby stabilizing combustion.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rear sealing device for a grate of a waste incinerator.

[Prior art] As shown in Figure 3, the grate of a typical garbage incinerator is
Drying grate 21, combustion grate 22 and post-combustion grate 23
It is composed of. And each grate is
It is constructed by alternately arranging a movable grate 1 attached to a movable girder 4 that is reciprocally driven by a hydraulic cylinder 3 and a fixed grate 2 fixed to a fixed girder 5. The reciprocating motion sequentially sends it downstream and burns it during that time.

It is engaged with a bearing box provided at the rear end of the movable grate 1 or at the upper protrusion of the movable girder 4. In this way, the movable grate 1 is allowed to swing vertically and is driven back and forth.

In order to prevent garbage from being carried to the rear side by retracting the first movable grate 1 of the lower grate, and to reduce leakage of combustion air supplied from below each grate, the upper grate is A drop wall 7 is provided at the rear end, and the gap g between the lower end of the wall 7 and the movable grate 1 is made as small as possible.

[Problems to be Solved] By the way, the movable grate 1 cannot be moved up and down around the axis of the bearing box due to wear and tear on the grate 1, ash adhering to the grate surface, slight molten metal, etc. I will do it. Therefore, in consideration of this vertical movement, the actual situation is that the gap g between the lower end of the drop wall 7 and the movable grate 1 has to be made to be a considerable gap.

Therefore, combustion air cannot be uniformly supplied from the entire area of the grate, leading to problems such as abnormal combustion.

SUMMARY OF THE INVENTION An object of the present invention is to provide a grate rear sealing device that can solve the above-mentioned problems.

[Means for Solving the Problems] The rear sealing device for a grate of the present invention includes a heat-resistant metal piece that is provided below the drop wall of the upper grate and slopes downward toward the lower grate; A seal metal fitting whose base end is swingably provided at the rear end of the upper grate, the tip of which rests on the movable grate of the lower grate below the heat-resistant metal fitting; It consists of a seal plate vertically installed at the rear end of the upper fire grate, the lower end of which is in contact with the upper surface of the seal hardware.

[Function] Heat-resistant hardware that slopes downward toward the lower grate,
This prevents garbage from being taken home when the movable grate is retracted.

On the other hand, there is a sealing hardware whose base end is swingable, and whose distal end rests on the movable grate of the lower grate, and a sealing plate whose lower end is in contact with the upper surface of the sealing hardware. Combustion air can be sealed while allowing the movable grate to move up and down.

[Example 1] An example of the present invention will be described below with reference to Figures 1 and 2.

It is constructed by alternately arranging a movable grate 1 attached to a movable girder 4 that is reciprocally driven by a hydraulic cylinder 3 and a fixed grate 2 fixed to a fixed girder 5. The reciprocating motion sequentially sends it downstream and burns it during that time.

It is engaged with a bearing box 6 provided at the rear end of the movable grate 1 or at the upper protrusion of the movable girder 4.

In this way, the movable grate 1 allows vertical swinging,
It is designed to be driven back and forth.

On the lower surface of the ceiling frame 11 of the lower fire grate, heat-resistant metal fittings 8 which are inclined downward toward the lower fire grate are provided below the drop wall 7. The space between the inclined lower end of the heat-resistant metal fitting 8 and the upper surface of the movable grate 1 is narrowed to prevent garbage from being carried away when the movable grate 1 is retreated.

At the rear end of the upper grate, there is a sealing hardware 9 at its base end 9.
It is supported by a pin and is swingably provided. The tip 9b rests on the movable grate 1 of the lower grate below the heat-resistant hardware 8. In this way, as the movable grate 1 moves up and down, the seal hardware 9 can swing around the bottle with its tip 9b in contact with the upper surface of the movable grate 1. In addition, seal hardware 9
A step portion 9c is formed on the upper surface of.

The seal plate 10 is vertically installed on the lower surface of the ceiling frame 11, and its lower end is in contact with the side surface of the stepped portion 9C on the upper surface of the seal hardware 9. In this way, even if the sealing hardware 9 swings as the movable grate 1 moves up and down, the lower end of the sealing plate 10 is always in contact with the stepped portion 9C of the sealing hardware 9, and combustion air is sealed. ing.

[Effects of the Invention] The grate rear sealing device of the present invention is as described above, and the heat-resistant hardware that slopes downward toward the lower grate prevents trash from being taken away when the movable grate is retracted. I can do it.

On the other hand, a sealing hardware whose base end is swingable and whose tip rests on the movable grate of the lower grate, and a sealing plate whose lower end touches the upper surface of the sealing hardware are used in the lower tier. Combustion air can be sealed while allowing the movable grate to move up and down, thus making it possible to stably burn waste.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the apparatus of the present invention, FIG. 2 is an enlarged explanatory diagram of the main part, and FIG. 3 is an explanatory diagram of a grate of a conventional garbage incinerator. 7... Drop wall 8... Heat-resistant hardware 9... Seal hardware 9a... Base end portion 9b... Tip portion 9c... Step portion 10... Seal plate applicant's agent Patent attorney Takehiko Suzue 3rd WJ

Claims (1)

[Claims] A heat-resistant metal fitting located below the drop wall of the upper fire grate and tilting downward toward the lower fire grate, and a base end swingably provided at the rear end of the upper fire grate. A sealing metal fitting, the tip of which rests on the movable grate of the lower grate below the heat-resistant metal fitting, and a sealing plate hanging vertically at the rear end of the upper grate, the lower end of which rests on the movable grate of the lower grate. The rear sealing device of the grate, consisting of: a part in contact with the upper surface of the above seal hardware;