JPS6311596Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention makes the arc furnace enclosure, specifically a part of the silencer of the enclosure, movable and doubles as a door, thereby reducing the opening of the enclosure and simplifying the structure. This invention relates to an arc furnace enclosure with improved dust collection capacity.

In recent years, while the energy situation has worsened, regulations on improving the work environment and preventing pollution have become even more stringent.

Arc furnaces for steelmaking generate loud noises of up to 120 dBA, which can cause occupational diseases such as hearing loss, and the smoke and dust generated from arc furnaces can significantly worsen the working environment, so the operation of arc furnaces for steelmaking must be carried out under all circumstances. It's in a tough environment. In addition, since there are many openings in a steelmaking factory, a large amount of air is sucked in in addition to smoke dust, so a large amount of air is required to prevent dust pollution through general building dust collection, which requires the operation of large fans.

In order to solve these problems, the entire arc furnace was enclosed in an enclosure to prevent the leakage of smoke and dust, and the noise was insulated until normal conversation was possible, which significantly improved the working environment for general work. In addition, it has become possible to reduce the amount of exhaust air by more than half.

However, as shown in Fig. 1, the conventional enclosure has an opening b for carrying in and out equipment and an opening c for an entrance hole in addition to the silencer d and the vent hole in the enclosure a of the arc furnace, and each has a door attached to it, so the structure is complicated and lacks rigidity. Also, the large number of doors causes a large amount of air to flow in, which reduces the dust collection capacity and may cause smoke and sound leakage. It is possible to prevent air inflow or smoke leakage by disposing a seal around the door, but the seal is expensive because of the large number of seal parts, and the sealing effect is not necessarily sufficient.

The present invention eliminates the above-mentioned drawbacks of the conventional enclosure,
By making a part of the silencer of the enclosure movable and also serving as a door, the opening of the enclosure is reduced and the structure is simplified, and smoke collection ability and mechanical strength are high.
The purpose is to provide an arc furnace enclosure with less smoke and noise leakage, and an opening is provided in the side wall of the enclosure provided to cover the arc furnace, and an opening is provided on the outside of the wall surrounding the opening. A silencer that is larger than the opening and can be divided into a part near the opening and a part away from the opening is disposed in close contact with each other, and the part of the silencer near the opening can be moved. This relates to an arc furnace enclosure characterized by being able to open and close.

Embodiments of the present invention will be described below based on the drawings.

An opening 3 is provided in the side wall of an enclosure 2 provided to cover an arc furnace 1, and an enclosure 2 provided with the opening 3.
Two tracks 4 are laid parallel to the wall, and the opening 3
A mobile silencer 5 having a slightly larger ventilation hole is disposed on the track 4 so that it can run on the track 4 and come into close contact with the outer periphery of the opening 3. Furthermore, the fixed silencer 6 is placed outside the opening 3,
The silencer 5 is disposed in close contact with the opening of the mobile silencer 5 which is located in close contact with the wall of the enclosure 2 provided with the opening 3, and is configured to communicate the outside air with the inside of the enclosure 2. In the figure, 7 is a duct that sucks smoke and dust inside the enclosure 2, 8 is a ceiling cover provided on the ceiling of the enclosure 2,
Reference numeral 9 indicates a door provided on the side wall of the enclosure 2, and reference numeral 10 indicates a ladle.

When operating the arc furnace 1, the mobile silencer 5 is moved on the track 4 and positioned between the wall of the enclosure 2 and the fixed silencer 6, so that air passes through the fixed silencer 6 and the mobile silencer 5. It enters the enclosure 2 and is sucked and discharged from the duct 7 along with the smoke and dust generated from the arc furnace 1.

When a worker enters or exits the enclosure 2 or carries equipment or the like into or out of the enclosure 2, the mobile silencer 5 is moved to the retreat position and the opening 3 is opened. Using the opened opening 3, a worker can enter and exit from between the fixed silencer 6 and the wall of the enclosure 2, and equipment, etc. can be carried in and out.

Therefore, since the opening 3 provided as the ventilation hole of the mobile silencer 5 is also used as an entrance for workers and an entrance for carrying in and out equipment, etc., there is no need to provide a separate entrance for workers and an entrance for carrying in and out of equipment, etc.
The number of openings and doors provided in the enclosure 2 can be reduced.

In this embodiment, since the entire silencer is large and heavy, it is divided into two parts, and the side that contacts the enclosure is made movable. Therefore, the silencer can be easily moved. However, if it is possible to transport long items, the fixed silencer may also be a mobile type. In that case, it is only necessary to move the side in contact with the enclosure during normal work, and move both silencers only when transporting.

It should be noted that the arc furnace enclosure of the present invention is not limited to the above-mentioned embodiment, and the moving direction of the movable silencer may be in any direction, that is, it is not necessarily parallel to the side wall of the enclosure as in the embodiment. It is not necessary to move the silencer laterally; it may be moved vertically, or perpendicularly or diagonally to the side wall.Furthermore, the silencer can be moved not only by running it on wheels on a track, but also by raising and lowering it with a winch. In that case, positioning may be done by simply providing a guide rail or by combining a guide rail and a guide roller.Also, when running on the ground, there may be cases where only wheels are used without tracks, and furthermore, the opening may be A pit is dug in the outside floor surface, and commonly used means for moving heavy objects can be applied, such as elevating and lowering the space between the inside of the pit and the position abutting the opening using an elevating mechanism such as a hydraulic cylinder.
Of course, various changes can be made without departing from the gist of the present invention.

As described above, according to the arc furnace enclosure of the present invention, () a part of the silencer of the enclosure provided to cover the arc furnace is made movable, so that the ventilation hole of the silencer can be used as an entrance/exit for workers; It can also be used as a loading/unloading entrance for equipment, etc.

() The ventilation hole of the silencer can also be used as an entrance for workers and an entrance for transporting equipment, etc.
It is possible to omit the entrance/exit and the entrance/exit which were conventionally provided separately in the enclosure.

() Since the openings and doors for the entrance and exit can be omitted, the number of sealing parts can be reduced, the structure can be simplified, and the mechanical strength can be increased.

() Since some openings and doors can be omitted, the airtightness of the enclosure is increased, air inflow, smoke leakage, and sound leakage are reduced, smoke collection ability is improved, and the soundproofing effect is also enhanced. It will be done.

() Since a part of the silencer on the opening side is movable, there is no need to move the entire silencer, and the silencer can be easily moved, reducing labor for moving the silencer and improving workability.

It exhibits various excellent effects such as.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional enclosure, FIG. 2 is an explanatory diagram of an arc furnace enclosure of the present invention, and FIG. 3 is a view taken in the -direction arrow of FIG. In the figure, 1 is an arc furnace, 2 is an enclosure, 3 is an opening, 4 is a track, 5 is a mobile silencer, 6 is a fixed silencer, and 7 is a duct.

Claims (1)

[Scope of utility model registration request] An opening is provided in the side wall of an enclosure provided to cover the arc furnace, and the outside of the wall surrounding the opening can be divided into a part larger than the opening and close to the opening, and a part remote from the opening. An arc furnace enclosure characterized in that a silencer is disposed in close contact with each other, a portion of the silencer near the opening is movable, and the opening can be opened and closed.