JPH0643677Y2 - Dust introduction pipe device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a dust introduction pipe in which a suitable number of dust introduction pipes are arranged in series in order to guide dust generated in a metal melting furnace, dust such as slag, to a dust collector. Regarding the device.

[Prior Art] There is provided a dust introduction pipe device in which a suitable number of dust introduction pipes are arranged in series in order to introduce dust such as dust and slag generated in a metal melting furnace to a dust collector. Here, dust generated in the metal melting furnace, dust such as slag, is deposited and fixed on the inner surface of the dust introducing pipe device. Such sticking reduces the dust collecting capability of the dust collector, and adversely affects the metal melting in the metal melting furnace.

Therefore, conventionally, a worker enters the inside of the dust introducing pipe device, and manually collects the dust adhered to the inner surface of the dust introducing pipe device, conveys it, and discharges it.

[Problems to be Solved by the Invention] Conventionally, as described above, an operator enters the inside of the dust introducing pipe device and manually discharges the dust adhered to the inner surface of the dust introducing pipe device. This discharge work is hard work.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a dust introduction tube device that can reduce dust discharge work.

[Means for Solving the Problems] The dust introduction tube device of the present invention is interposed between a metal melting furnace that generates dust during melting and a dust collector that sucks dust generated in the metal melting furnace. In order to guide the generated dust to the dust collector, a suitable number of dust introduction pipes are arranged in series in parallel. At least one dust introduction pipe is a dust discharge pipe that defines the dust discharge port that opens on the bottom wall. A swing cover that is pivotally supported near the opening of the lower surface of the dust discharge port and that opens and closes the lower surface opening of the dust discharge port and a balance weight that urges the swing cover in the closing direction. It is characterized by doing. The dust introducing tube may be a sliding tube or a smoke collecting tube as shown in Examples described later.

[Operation] In the present invention, dust is collected in the dust outlet of the dust introduction pipe. At this time, when the weight of dust overcomes the biasing force of the balance weight, the swing lid automatically swings in the opening direction, and the dust discharge port opens. Therefore, the dust in the dust outlet is discharged. When the dust is discharged, the swing lid is automatically swung in the closing direction by the biasing force of the balance weight, and the dust discharge port is closed.

[Embodiment] An embodiment of the present invention will be described below. First, the overall configuration will be described. Arc light type electric furnace 1 as a metal melting furnace
The furnace includes a furnace body 10 for melting steel, a furnace lid 11, and a graphite electrode 13 charged in an electrode hole of the furnace lid 11. In this electric furnace 1, an arc is generated between the graphite electrode 13 and the molten metal of the furnace body 10 to heat the molten metal.

In this embodiment, dust generated during melting in the electric furnace 1 and dust such as slag are guided to the dust collector 9 through the dust introduction pipe device 8, the combustion pipe 5, and the passage 9a. The combustion tube 5 is composed of an upper tower 50 and a lower tower 55.

The dust introducing pipe device 8 includes one elbow 2 facing the hole of the furnace lid 11, one sliding pipe 3 following the elbow 2, and a sliding pipe 3.
And a plurality of smoke collecting tubes 4 following. Sliding tube 3 is wheel 30
And the sliding pipe 3 is moved by the arrow X on the base 75 due to the rolling of the wheels 30.
Can be moved in 1 and X2 directions. The sliding tube 3 is usually moved when the electric furnace 1 is tilted and the molten metal is poured.

As shown in FIG. 2, the sliding pipe 3 includes a dust discharge tube 32 that defines a dust discharge port 31 that opens at the bottom wall, and a dust discharge port.
A swing lid 33 is swingably supported by a shaft 33a in the vicinity of the opening of the lower surface of 31 and a balance weight 34 for biasing the swing lid 33 in the closing direction in the direction of arrow B1. Here, when the weight of the dust accumulated in the dust outlet 31 increases and the weight overcomes the balance weight 34, the swing lid 33 opens in the opening direction, that is, the arrow B2 direction, and the dust outlet 31 The bottom opening is automatically opened. When the dust in the dust discharge port 31 is completely discharged, the swing weight 33 is swung in the closing direction by the biasing force of the balance weight 34, and the dust discharge port 31 is automatically closed. As described above, the rocking lid 33 is closed by the urging force of the balance weight 34 except when the dust is discharged, so that the suction operation by the dust collector 9 is not adversely affected. As shown in FIG. 2, a dust discharge pipe 70 is provided below the sliding pipe 3.

Further, as shown in FIG. 3, the smoke collecting pipe 4 is swingable via a dust discharge tube 42 that defines a dust discharge port 41 opening to the bottom wall portion and a shaft 43a near the lower surface opening of the dust discharge port 41. The swing lid 43 is pivotally supported, and the balance weight 44 for biasing the swing lid 43 in the closing direction, that is, the direction of the arrow C1 is provided.

Here, in the same manner as described above, when the weight of the dust in the dust outlet 41 increases and the weight overcomes the balance weight 44, the swing lid 43 opens in the opening direction, that is, the arrow C2 direction, and the dust outlet 41 The lower surface opening of is automatically opened. When the dust in the dust outlet 41 is completely discharged, the balance weight
Due to the urging force of 44, the swing lid 43 is closed in the direction of the arrow.
It swings in the C1 direction, and the dust outlet 41 is automatically closed.
In this way, the rocking lid 43 is closed except when the dust is discharged, so that the suction operation by the dust collector 9 is not adversely affected.

A conveyor device is provided below the smoke collection pipe 4 of the dust introduction pipe 8.
Equipped with 72.

When melting steel in the electric furnace 1, a large amount of dust such as dust and slag is generated. Therefore, the dust collector 9 is operated to suck the dust toward the dust collector 9 side through the dust introduction pipe device 8 and the combustion pipe 5. When the suction time elapses to some extent, dust accumulates on the entire bottom wall of the inner surface portion of the dust introducing pipe device 8.

At this time, in the sliding pipe 3 of the dust introducing pipe 8, when the weight of the dust accumulated in the dust discharge port 31 exceeds a certain amount, the weight of the dust overcomes the biasing force of the balance weight 34. Then, the swing lid 33 swings in the opening direction, that is, in the arrow B2 direction, and the dust discharge port 31 opens. Therefore, sliding tube 3
The dust in the dust discharge port 31 is automatically discharged, and is discharged to the disposal site through the dust discharge pipe 70.

After the dust is discharged from the dust discharge port 31 of the sliding tube 3, the swing weight 33 is automatically swung in the closing direction by the biasing force of the balance weight 34, and the dust discharge port 31 is closed. .

Further, in the smoke collection pipe 4 of the dust introduction pipe 8, when the weight of the dust accumulated in the dust discharge port 41 exceeds a certain amount, the weight of the dust overcomes the biasing force of the balance weight 44. Then, the swing lid 43 swings in the opening direction, that is, in the arrow C2 direction, and the dust discharge port 41 opens. Therefore, the dust in the dust discharge port 41 of the smoke collecting pipe 4 is automatically discharged, and is discarded to the disposal place via the conveyor device 72 and the dust discharge pipe 73.

When the dust is discharged from the dust discharge port 41 of the smoke collecting pipe 4, the swinging lid 44 is automatically swung in the closing direction, that is, the direction of arrow C1 by the urging force of the balance weight 44, and the dust discharge port 41 Is blocked.

Further, in the smoke collecting pipe 4 according to the present embodiment, dust collects on the inner surface of the peripheral wall portion other than the dust discharge port 41. Therefore, after a lapse of a predetermined time, a worker may enter the smoke collecting tube 4 to manually remove dust using a scoop or the like. In this case, as shown in FIG. 1, since the smoke collection tube 4 has a proper number of dust discharge ports 41 formed at a short distance,
It suffices for the worker to convey the dust to the nearest dust outlet 41 with a scoop or the like.

Then, when the dust conveyed to the dust discharge port 41 exceeds a certain amount, it overcomes the biasing force of the balance weight 44, so that the swing plate 43 is automatically opened in the opening direction, and then the conveyor device 72. It is placed and transferred to the disposal site.

As described above, in the smoke collecting pipe 4 according to the present embodiment, the dust outlet
Dust also collects on the inner surface of the peripheral wall other than 41, but the worker who enters the smoke collecting pipe 4 collects the dust to the nearest dust outlet 41, that is, for a short distance (about 1 to 3 m at most) with a scoop or the like. You just need to transport it.

In this regard, in this point, in the conventional case, the smoke collection tube 4 was not formed with an appropriate number of dust discharge ports 41, so that the worker who entered the smoke collection tube 4 took a long distance to the end of the smoke collection tube 4 for dust ( Ten~
It has to be transported about 17m), which is different from heavy labor.

By the way, in the present embodiment, when the dust generated in the electric furnace 1 performing the high temperature melting work is sucked to the dust collector 9 side, the smoke collecting pipe 4
A considerable amount of heat acts inside the. Therefore, the smoke collector 4
The dust collected in the dust discharge port 41 may be sintered by heat and fixed to the inner surface of the dust discharge port 41. In this case, the dust discharge port 41 is clogged, and it is necessary to perform opening work with a breaker or the like. For this reason, in this embodiment, as shown in FIG. 4, the dust discharge port 41 of the smoke collecting pipe 4 may be filled with a filler material 75 such as sand which is difficult to sinter even when heat is applied. preferable. In this way, the filler material 75 such as sand does not sinter even when heat is applied, which is advantageous in preventing clogging of the dust outlet 41.

[Advantages of the Invention] According to the dust introduction pipe device of the present invention, when the dust accumulated in the dust discharge port, dust such as slag, exceeds a certain amount, the urging force of the balance weight is overcome, so that the swing plate is It is automatically opened and discharged in the opening direction. Therefore, it is possible to reduce manual work in dust discharging work.

When the dust in the dust outlet is completely discharged, the oscillating force of the balance weight causes the swing lid to swing in the closing direction, and the dust outlet is automatically closed. Is closed, which has the effect of not adversely affecting the suction operation of the dust collector.

[Brief description of drawings]

1 to 4 show one embodiment of the present invention, FIG. 1 is a side view of the whole, FIG. 2 is a vertical sectional view of the vicinity of a sliding pipe, and FIG. 3 is a transverse sectional view of a smoke collecting pipe, FIG. 4 is a vertical cross-sectional view showing a usage pattern of the dust outlet of the smoke collecting pipe. In the figure, 1 is an arc light electric furnace (metal melting furnace), 3 is a sliding tube,
4 is a smoke collecting pipe, 31 and 41 are dust outlets, 33 and 43 are swinging lids,
34 and 44 are balance weights, 8 is a dust introducing pipe device, and 9
Indicates a dust collector.

Claims (1)

[Scope of utility model registration request] 1. An appropriate number of dusts interposed between a metal melting furnace that generates dust during melting and a dust collector that sucks dust generated in the metal melting furnace to guide the dust generated in the metal melting furnace to the dust collector. The introduction pipes are arranged in parallel in series, and at least one dust introduction pipe can swing near the opening of the bottom face of the dust discharge pipe that defines the dust discharge port that opens to the bottom wall. Is pivoted to
A dust introduction tube device comprising: a swing lid that opens and closes an opening of a lower surface of the dust discharge port according to swinging; and a balance weight that biases the swing lid in a closing direction.