JPH0221758Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an air seal device for pallets of a sintering machine.

[Prior art] Generally, the bottom surface of the pallet of a DL type sintering machine has an eighth
An air seal device as shown in the figure is used.

This air seal device presses an air seal bar 12 with a spring 14 against a mating plate, the slide bed plate 11 shown in FIG. 7, to seal the flow of outside air into the window box 4.

However, the air seal bar 12 of this device is inside the air seal case 13, and the air seal bar 12
There was a problem in that air leaked from the gaps 13a and 13b necessary for the operation of the valve.

Therefore, a device has been proposed in which an O-ring or a gasket is inserted into the gaps 13a and 13b to try to seal the air.

[Problem that the invention attempts to solve]

However, this conventional device has a problem in that if the O-ring or packing is given a crushing margin as much as necessary for the seal, the reaction force will act as resistance to the operation of the air seal bar 12, resulting in malfunction.

That is, in the conventional device shown in FIG. 10, O-ring grooves are formed on both sides of the air seal bar 12, and the O-ring 16 is inserted into the O-ring grooves to form gaps 13a and 13b between the air seal bar 12 and the air seal case 13. This is a device that seals the

However, in order to ensure a reliable seal, if the rubber O-ring 16 is compressed to a large extent, the operating resistance of the air seal bar 12 will increase accordingly.
In order to ensure the operation of the air seal bar 12, if the gaps 13a and 13b between the air seal bar 12 and the air seal case 13 are made larger, the O-ring 1
No. 6 tends to cause the phenomenon of extrusion, and in extreme cases, the sealing effect is lost.

Further, if the air seal bar 12 does not move in the upwardly raised state, a gap is generated between the air seal bar 12, which originally seals air, and the slide bed plate 11, and the sealing function is lost.

This invention was proposed to solve the above-mentioned problems, and when sealing air, the sealing member between the air seal bar and the inner surface of the air seal case does not create operational resistance of the air seal bar and does not cause malfunction. The object of the present invention is to provide an air seal device for pallets of a sintering machine.

[Means for solving problems]

The present invention solves the above-mentioned problems by attaching an air seal bar via a spring to the inner surface of an air seal case with a U-shaped cross section that opens downward and is attached to the bottom surface of a pallet of a sintering machine. In an air seal device for a pallet of a sintering machine, the elastic body is pressed against a lower sliding bed plate by a spring, the upper end of the elastic body having an L-shaped cross section contacts the inner surface of the air seal case, and the bottom surface is fixed on the air seal bar. A concave neck portion is provided inside the bent portion of the elastic body, and the elastic body is fixed on the air seal bar at the end closer to the pallet, or the upper end is in contact with the inner surface of the air seal case when the hardness of the material of the elastic body is sucked. , the upper end is selected to be separated from the inner surface of the air seal case at a predetermined distance when not suctioning;
This is an air seal device for a pallet of a sintering machine in which the elastic body is fixed on the air seal bar at the end closer to the pallet.

[Effect]

Next, to explain the operation of the present invention, as shown in Fig. 1, a rubber seal 1 which is an elastic body
A concave neck portion 17d shown in FIG. 2 is provided on the inside of the bent portion 7, and the rubber seal 17 is fixed on the air seal bar 12 at the end closer to the pallet 3, or the rubber seal 17 is an elastic body as shown in FIG. The rubber seal 17 is selected so that its upper end is in contact with the inner surface 13 of the air seal case 13 during suction, and the upper end is separated from the inner surface of the air seal case 13 by a predetermined distance when not suctioning, as shown in FIG. Fix it on the air seal bar at the opposite end.

Therefore, when suctioning, the upper end touches the inner surface of the air seal case, and when not suctioning, the upper end is separated from the inner surface of the air seal case at a predetermined distance, improving the sealing performance when sealing air, and connecting the air seal bar and the inner surface of the air seal case. The sealing member between the air seal bar and the air seal bar does not act as resistance to the operation of the air seal bar, and does not cause malfunction.

〔Example〕

Hereinafter, the present invention will be described based on embodiments with reference to the drawings.

FIG. 6 shows the entire sintering machine, and the sintering machine 1 is composed of sprockets 2a, 2b, pallets 3, wind box 4, etc. On the upstream side of the sintering machine 1, there is a bedding supply device 5, A raw material supply device 6, an ignition device 7, etc. are installed.

The sintering process is well known, but its outline will be explained below.Bedding ore is laid on the pallet 3 of the sintering machine 1 from the bedding supply device 5, and the sintering raw material is poured onto it from the material supplying device 6. Laminated supply.

The sintering raw materials contain iron ore, limestone, etc., as well as coke powder. The bedding ore and sintering raw material supplied onto the pallet 3 are moved to the ignition device 7 side by a drive device 8.

The ignition device 7 is provided with a burner 9 that uses gas or heavy oil as fuel, and the flame or heat of the burner 9 ignites the coke powder in the sintering raw material to sinter and harden the sintering raw material.

A plurality of wind boxes 4 are installed below the pallet 3. The wind boxes 4 are connected to a duct exhaust system, and the wind boxes 4 are connected to the pallet 3 to facilitate ignition of coke in the sintering raw material and sintering of the sintering raw material. Air is sucked in from the top.

The sintering raw material is pushed together with the pallet 3 by the drive device 8, and during this movement, sintering progresses from the upper layer to the lower layer of the sintering raw material, and is discharged at the downstream end of the sintering machine 1.

As shown in FIGS. 7, 8, and 9, the air seal bar 12 attached to the pallet 3 side slides over the slide bed plate 11 attached to the wind box 4, and the air seal bar 12 is attached to the pallet 3 side. Negative pressure inside 4 (-1500~-
2000mmAq), the pallet 3 is pushed toward the discharge side of the sintering machine 1.

Grease is supplied between the air seal bar 12 and the slide bed plate 11 for both lubrication and sealing for drawing outside air into the window box 4.

An embodiment of the present invention is shown in FIGS. 1 and 7, which are cross-sectional views taken along line A-A in FIG. An air seal device for a pallet of a sintering machine is provided, in which an air seal bar 12 is attached to the inner surface of a case 13 via a spring 14, and the air seal bar 12 is pressed against a lower slide bed plate 11 by the spring 14 to prevent air from entering. It is something to improve.

Furthermore, rubber seals 17 and 18, which are sealing members, are mounted between the inner surface of the air seal case 13 and the upper surface of the air seal bar 12 using metal fittings 19 and 20.

In this embodiment, rubber seals 17 and 18 were attached to the upper surfaces of both sides of the air seal bar 12 as shown in FIG.

As shown in FIG. 2, the rubber seal 17 is placed closer to the pallet 3, that is, on the window box 4 side, so that the gap between the tip of the rubber seal 17 and the inner surface of the air seal case 13 is 0.2 mm, and then fixed with the stopper 19. did.

On the other hand, as shown in FIG.
The tip of the rubber seal 18 is brought into surface contact with the inner surface of the air seal case 13 on the outside of the pallet 3, that is, on the wheel side of the pallet 3, and the air seal bar 12
Adjust the stopper 20 so that it can be operated.
It was fixed with.

As shown in FIG. 2, the rubber seals 17 and 18 usually have a spacing of 0.2 to 0.3 mm from the air seal case 13, and are arranged so as not to come into contact with each other, so that they do not create resistance to the operation of the air seal bar 12.

Here, when air is drawn from inside the wind box 4 (while the pallet 3 is on the upper side in the overall view shown in FIG. 6), the rubber seal 17 is bent at the neck portion 17d by the suction force, and the rubber seal 17 is bent at the neck portion 17d as shown in FIG. The tip contacts the air seal case 13 to seal the air.

When the air suction force is removed (while the pallet 3 is on the lower side), the tip of the rubber seal 17 returns to its original position as shown in FIG. 2.

The shape of the rubber seals 17 and 18 is determined by the pressure difference between the inside and outside of the wind box 4 and the hardness of the rubber used.

Further, the neck portion 17d can be omitted by lowering the hardness (softening) of the rubber used as in the rubber seal 17a shown in FIG. 4. In this case, only the portion in contact with the inner surface of the case may be softened.

The rubber seal 18 is attached to the outside of the pallet 3 in FIG. 7, that is, on the wheel side of the pallet 3, and as shown in FIG. Arranged so as not to create large resistance.

When air is drawn from inside the wind box 4, the suction force closes the rubber seal 1 as shown in FIG.
8 tends to fall in the direction of the arrow 18a from the L-shaped rising part, creating a gap and sucking in outside air, but this is prevented by increasing the hardness of the rubber seal 18 (hardening). When rubber seals 17 and 18 are provided on both sides in this way, it is effective to selectively use hard and soft rubber seals.

[Effect of idea]

As mentioned above, in this invention, the upper end touches the inner surface of the air seal case during suction, and the upper end is separated from the inner surface of the air seal case at a predetermined distance when not suctioning, improving the sealing performance when sealing air. The seal member between the bar and the inner surface of the air seal case does not act as resistance to the operation of the air seal bar and does not cause malfunction.

In this example, a rubber seal was further fixed on the air seal bar at the end on the atmosphere side to improve sealing performance.

The air leakage rate was approximately 10% in the conventional device, and 1% in this example.
This resulted in a significant reduction in sintering exhaust gas.

This has the effect of reducing the electric power of the exhaust fan and the processing cost of the downstream desulfurization and denitrification equipment.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of an embodiment of the present invention; Figure 2;
3, 4, and 5 are explanatory diagrams of the sealing member constituting the embodiment of FIG. 1, FIG. 6 is an overall view of the sintering machine, and FIG. 7 is the sintering machine pallet, wind box, A partial cross-sectional view of the air seal bar and slide bed plate assembly. Figure 8 is a cross-sectional view taken along line A-A in Figure 9 showing an air seal device for pallets of a conventional sintering machine. FIG. 10 is an explanatory diagram including a partial sectional view of the air sealing device. FIG. 10 is a sectional view taken along the line A--A in FIG. 9 showing the air sealing device for pallets of a conventional sintering machine. 1...Sintering machine, 3...Pallet, 11...Slide bed plate, 12...Air seal bar,
13...Air seal case, 14...Spring, 17, 17a, 18...Rubber seal, 17d
...Network part, 19,20...stopper.

Claims (1)

[Claim for Utility Model Registration] An air seal bar is attached via a spring to the inner surface of an air seal case with a U-shaped cross section that opens downward and is attached to the bottom surface of a pallet of a sintering machine, and the air seal bar is slid downward by the spring. In an air seal device for a pallet of a sintering machine, the upper end of an elastic body having an L-shaped cross section is in contact with the inner surface of the air seal case, and the bottom surface is fixed on the air seal bar. A concave neck portion is provided, and the elastic body is fixed on the air seal bar at the end closer to the pallet, or the upper end of the elastic body is in contact with the inner surface of the air seal case when suctioning, and the elastic body is fixed on the air seal bar at the end closer to the pallet. selected so that the upper end is separated from the inner surface of the air seal case by a predetermined distance,
An air seal device for a pallet of a sintering machine, characterized in that the elastic body is fixed on the air seal bar at the end closer to the pallet.