JPH07180974A - Ceiling crane having dust collecting hood - Google Patents

Abstract

PURPOSE:To collect a large amount of dusts generated and lifted up during transferring operation of pig iron into a ladle without leaking any dusts by a method wherein one large-sized seal grid is constructed by many seal plates so as to cover all the lower portions of a ceiling crane. CONSTITUTION:One large-sized seal grid is comprised of fixed type seal plates 25, 26, wire punching seal plates 18, 20 run in a lateral direction together with a crane wire and slide-type seal plates 40, 54 for shielding a passage of the crane wire so as to collect dusts of high concentration through a dust collecting duct 11 mounted on a machine and a dust collecting duct 11 installed on the ground. With such an arrangement as above, it is possible to collect dusts raising together with an ascending air flow without leaking the dusts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling hood-mounted dust collecting hood for collecting dust generated when hot metal ladle is transferred.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 57-16110 discloses a conventional dust collecting hood for an overhead crane used for a hot metal lapping operation involving dust generation. FIG. 9 is a schematic diagram of a hot metal pan transfer operation of a conventional dust collection hood of an overhead crane for hot metal.

In the figure, an overhead crane travels on a runway girder 101. Reference numeral 100 is the main girder of the crane, and the mechanism for suspending the ladle 98 is all supported by the main girder 100. The ladle 98 is suspended by the main winding hook 92 via the main winding hanger beam 91. The hot metal is charged into the converter 99 by tilting the ladle 98 with the auxiliary winding hook 102.

A large amount of dust is generated during this charging. The main winding hanger beam 91 is provided with a hood 93 and a small duct 94, and a large amount of dust generated during the charging passes through the hood 93 and then the small duct 94, and a converter furnace port dust collecting duct 97. It collects dust inside. At this time, the connection between the small duct 94 on the main winding hanger beam 91 side and the converter furnace mouth dust collecting duct 97 pushes open the damper 95 held by the spring 96 by the small duct 94 by the pressing force of the main winding hanger beam 91. The dust passes through the damper 95 and is collected in the converter furnace opening dust collecting duct 97.

[0005]

According to this conventional technique, only the dust sucked directly into the converter furnace opening dust collecting duct and the dust sucked into the hood attached to the main winding hanger beam are collected. However, most of the dust leaks during the hot metal lapping work that involves the generation of a large amount of dust. Also, the main winding hook of the crane can collect dust only at the end of the traverse.

It is an object of the present invention to provide a dust collecting hood for an overhead crane having a dust collecting function capable of collecting a large amount of dust generated without leaking a large amount of dust generated in the above-mentioned hot metal ladle transfer work or the like. To do.

[0007]

SUMMARY OF THE INVENTION An overhead crane having a dust collecting hood according to the present invention comprises a plate-shaped sealing plate horizontally attached to a lower surface of a main girder and a vertical edge of an outer edge of the horizontal plate-shaped body. An overhead crane having a box-shaped dust collecting box, which has a side plate hanging down and is attached to the lower side, and a duct for sucking dust from the side and connecting it to a dust collector, which is horizontal to the lower surface of the main girder of the overhead crane. It is a plate-shaped body that is attached and that shields the dust that rises in the ceiling direction by riding the rising airflow through the gap of the fixed seal plate, avoiding the traversing motion of the crane wire and sliding parallel to the traveling direction of the crane One or two or more slide type seal plates, and a vertical rectangular plate-like skirt attached to the slide type seal plates and sliding parallel to the traveling direction of the crane And a horizontal plate-like member attached to the main club and the auxiliary club of the overhead crane, which is directly below the main garter having a hole through which the main winding wire or the auxiliary winding wire traverses with the main winding wire or the auxiliary winding wire. And a sealing plate for main winding and auxiliary winding provided.

[0008]

In the dust collecting hood of the overhead crane having the dust collecting function of the present invention, one large seal box is constituted by a large number of fixed and sliding seal plates to cover the entire lower portion of the overhead crane. As a result, a large amount of dust generated during hot metal pot transfer work rises due to high temperatures,
The dust can be collected without leaking.

Further, since it is composed of a large number of fixed and sliding seal plates, it does not hinder the work of the crane when it is drawn under the main girder when dust is not collected. Further, since the high-density soot dust that rises in the ascending air current is collected directly above the dust source, the soot dust density is high, so the capacity of the dust collector can be small.

[0010]

An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic view of a vertical section of an overhead crane having a dust collecting hood according to the present invention. FIG. 2 is also a schematic view of the vertical side surface. FIG. 3 is a schematic view of the bottom surface of the dust collecting seal box of the present invention.

In these drawings, reference numeral 3 is a blast furnace pot, which is a container for receiving hot metal tapped from the blast furnace in the blast furnace and transporting the hot metal to a steelmaking plant. The capacity of the blast furnace ladle 3 is limited to about 150 tons or less due to the capacity of the railway for transportation, but the capacity of the ladle 2 of the converter is accurately measured by the amount of molten iron charged per converter. About 300 because it must be possible
Tons. Therefore, while accurately measuring the weight of the charging pan, 2-3 cups of hot metal in the blast furnace pan 3 are transferred from the blast furnace pan 3 to the charging pan 2 with this overhead crane. When this pan is transferred, a high temperature ascending air current is generated, and the high-density soot dust rises on it. The soot dust rises and is collected in the dust collecting seal container.

In these drawings, reference numeral 36 is a runway girder rail for a crane, on which an overhead crane travels in parallel with the building, and the main club 9 which suspends the blast furnace pot 3 is a girder rail of the main girder 8. The blast furnace ladle 3 can be moved vertically and horizontally by traversing the top at right angles to the building. The auxiliary winding hook 31 that tilts the blast furnace ladle 3 is supported by the auxiliary winding club 30, and the auxiliary winding club 30 traverses on the girder rail of the auxiliary girder 15 at a right angle to the building. The saddle 16 connects the two main girders 8 here,
It supports two auxiliary girders 15.

The side wall hood 26 has an inverted L-shaped cross section, and is composed of a rectangular horizontal plate and a rectangular vertical plate mounted so as to hang down from the outer edge of the horizontal plate. The horizontal plate constitutes the bottom part of the dust collecting seal container, and the vertical plate constitutes the side wall part of the dust collecting seal container, and collects the upward airflow containing high-density soot dust generated when the pan is transferred. To do. Since the operator's cab 32 of the crane is provided far below the lower surface of the main girder 8, the operator's eye position 33 of the crane is far below the lower surface of the main girder 8. The vertical plates of the do not obstruct the view of the crane operator.

Fixed seal plate rubber plates 25, which are rectangular horizontal plates, are attached to the lower surfaces of the two main girders 8 and the lower surfaces of the two auxiliary girders 15, respectively. These form the bottom part of the dust collecting seal box, and like the above, collect the upward airflow containing high-density soot dust.

Although the main winding wire rope 17 is suspended from the main club 9, the main winding seal plate 18 having a hole through which the main winding wire rope 17 passes is provided.
It is attached to the main club 9 by a mounting member extending downward from. Main winding wire rope 1
While the main winding seal plate 18 and the main winding seal plate 18 traverse integrally with the main club 9, the main winding seal plate 18 constitutes the bottom portion of the dust collecting seal box, and in the same manner as the above, high-density soot dust is generated. Collect the included updraft.

From the auxiliary club 30 to the auxiliary winding wire rope 20
The auxiliary winding seal plate 21 having a hole through which the auxiliary winding wire rope 20 penetrates is attached to the auxiliary club 3 extending downward from the auxiliary club 30.
It is attached to 0. While these are traversed integrally with the auxiliary club 30 as in the above, the auxiliary winding seal plate 21 constitutes the bottom surface of the dust collecting seal box, and as in the above case, the upward airflow containing high-density soot dust is generated. To collect.

FIG. 8 is a schematic view showing the dust collecting seal in a perspective view mainly showing a slide seal plate 29 with a vertical partition wall at an end, a slide seal plate 28 with an internal vertical partition wall, and a slide seal plate 27 on a ceiling wall. Is. Since the main winding wire rope 17 suspended from the main club 9 traverses, the gap of the fixed seal plate rubber plate 25 between the main girder 8 and the auxiliary girder 15 cannot be sealed with a fixed structure. Therefore, the horizontal plate that constitutes the bottom surface of the dust collecting seal box has a structure that moves backward or forward as the main winding wire rope 17 traverses. This situation is shown in Figure 8.
And FIG. 3 shows.

FIG. 3 is a schematic view of the bottom surface of the dust collecting seal case, in which reference numeral 37 is a traveling wheel. The slide seal plate 28 with the internal vertical partition wall and the ceiling wall slide seal plate 27 at the position where the main winding wire rope 17 is located are retracted. At this portion, the main winding seal plate 18 seals the rise of soot and dust. Similarly, auxiliary winding wire rope 20
The ceiling wall slide seal plate 27 at a certain position is retracted. Since the auxiliary winding wire rope 20 also traverses, it has a structure of moving backward or forward as it traverses. Four sets of slide seal plates 28 with an internal vertical partition wall and slide seal plates 29 with an end vertical partition wall are provided. If two sets of these are advanced, it is possible to seal the rise of soot and dust. Further, the side hood 26 can seal the soot and dust that wraps around the main girder 8 and rises.

FIG. 4 is a schematic view showing a perspective view of a main part of the slide seal plate 28 with an internal vertical partition wall. When the slide seal plate 28 with the internal vertical partition wall is retracted, both the horizontal plate portion and the vertical plate are vertically overlapped. The upper part is indicated by the reference numeral 40 and the lower part is indicated by the reference numeral 54, and the related positions thereof are also shown in FIG. 1 for the convenience of understanding.

FIG. 5 is a schematic view showing a main part of the slide seal plate 29 with the vertical partition wall at the end in a perspective view. When the slide seal plate 29 with the end vertical partition wall is retracted, both the horizontal plate and the vertical plate are vertically overlapped. The upper one is designated by the reference numeral 40 and the lower one is designated by the reference numeral 54 and similarly shown in FIG.

6 and 7 show an example of a drive mechanism used when the upper slide seal plate 40 and the lower slide seal plate 54 move backward or forward. FIG. 6 is a vertical sectional view of the drive mechanism as seen from the traveling direction. FIG. 7 is a vertical cross-sectional view of the drive mechanism as viewed in the transverse direction. In this embodiment, the electric shaft is connected to the rack-pinion and the upper slide seal plate 40 is used.
The lower slide seal plate 54 is driven by a wire-sheave mechanism having a double speed mechanism. In FIG. 7, reference numeral 55 is a counterweight for retracting the slide seal plate.

Other than this, a method may be adopted in which the upper slide seal plate 40 and the lower slide seal plate 54 are respectively moved backward and forward by screws to make the rotation speed ratio of the screw drive nut constant. Further, the slide seal plate 40 and the lower slide seal plate 54 may be driven by independent motors and independent fixed position stop mechanisms may be provided. It goes without saying that all of these drive mechanisms are also included in the scope of the present invention.

According to the overhead crane having the dust collecting hood of the invention, since a large seal box is constituted by a large number of sealing plates to cover the entire lower part of the overhead crane,
A large amount of high-temperature rising dust can be collected without leaking.

[0024]

The dust collecting hood of the overhead crane according to the present invention comprises a large number of fixed or sliding seal plates,
Since the bottom surface open box type dust collecting hood is formed, it is possible to completely shield the dust on the rising air flow despite having the wide opening.

This dust collecting hood is made up of a large number of fixed or sliding seal plates with no gaps, and it is possible to efficiently collect dust without entraining secondary air even during a pan transfer operation that generates dust. The capacity can be reduced, and dust can be completely shielded.

[Brief description of drawings]

1 is a schematic view of a vertical section of an overhead crane having a dust collecting hood of the present invention.

FIG. 2 is a sectional view of an overhead crane having the dust collecting hood of the present invention.

FIG. 3 is a schematic view of the bottom surface of the dust collecting seal box of the present invention.

FIG. 4 is a schematic view of a slide seal plate with an internal vertical partition wall according to the present invention.

FIG. 5 is a schematic view of a slide seal plate with an end vertical partition wall of the present invention.

FIG. 6 is a vertical sectional view of a drive mechanism for a slide seal plate according to the present invention.

FIG. 7 is a vertical cross-sectional view of the drive mechanism of the slide seal plate of the present invention.

FIG. 8 is a schematic view of a dust collecting seal box of the present invention.

[Fig. 9] Fig. 9 is a schematic view of a pan transfer operation by an overhead crane to which a conventional dust collecting hood is attached.

[Explanation of symbols]

 1 Dust collector 2 Charging pan 3 Blast furnace ladle 4 Receptacle chamber 5 Main winding suspension beam 6 Main winding hook 7 Soot dust 8 Main girder 9 Main club 11 Dust collecting duct 12 Ground side dust collecting duct 14 Duct connecting device 15 Auxiliary girder 16 Saddle 17 Main winding wire rope 18 Main winding seal plate 20 Auxiliary winding wire rope 21 Auxiliary winding seal plate 25 Fixed seal plate rubber plate 26 Side wall hood 27 Ceiling wall slide seal plate 28 Slide seal plate with internal vertical partition wall 29 End part Slide seal plate with vertical partition wall 30 Auxiliary club 31 Auxiliary hook 32 Crane driver's cab 33 Crane operator's eye position 36 Runway girder rail 37 Running wheel 40 Upper slide seal plate 54 Lower slide seal plate 91 Main winding hanger beam 93 Hood 94 Small Duct 95 Damper 96 Spring 97 rolling furnaces mouth dust duct 98 ladle 99 rolling furnace 100 main girders 101 run Parkway girder 102 auxiliary winding hook

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[Procedure amendment]

[Submission date] March 15, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

FIG. 3 is a schematic view of the bottom surface of the dust collecting seal case, in which reference numeral 37 is a traveling wheel. The slide seal plate 28 with the internal vertical partition wall and the ceiling wall slide seal plate 27 at the position where the main winding wire rope 17 is located are retracted. At this portion, the main winding seal plate 18 seals the rise of soot and dust. Similarly, auxiliary winding wire rope 20
The ceiling wall slide seal plate 27 at a certain position is retracted. Since the auxiliary winding wire rope 20 also traverses, it has a structure of moving backward or forward as it traverses. Four sets of slide seal plates 28 with an internal vertical partition wall and slide seal plates 29 with an end vertical partition wall are provided. If two sets of these are advanced, it is possible to seal the rise of soot and dust. The dust rising crowded around the side of the main girder 8 may be thus sealed to the side wall hood 26.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction content]

6 and 7 show an example of a drive mechanism used when the upper slide seal plate 40 and the lower slide seal plate 54 move backward or forward. FIG. 6 is a rigid sectional view of the drive mechanism as seen from the traveling direction. FIG. 7 is a vertical cross-sectional view of the drive mechanism as viewed in the transverse direction. In the present embodiment, the electric shaft is connected to the shaft 55 of the pinion, and the rack-pinion is used.
Move the upper slide seal plate 40 via the ON mechanism,
That is, the lower slide seal plate 54 is driven by a wire-sheep mechanism having a double speed mechanism. here
In this case, the lower slide seal plate 54 is the upper slide seal plate.
It is supposed to move twice the moving distance of 40.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of symbols] 1 dust collector 2 charging pot 3 blast furnace pot 4 iron receiving chamber 5 main hoisting beam 6 main winding hook 7 soot dust 8 main girder 9 main club 11 on-board dust collecting duct 12 ground side dust collecting duct 14 duct connection Device 15 Supplementary girder 16 Saddle 17 Main winding wire rope 18 Main winding seal plate 20 Supplementary winding wire rope 21 Supplementary winding seal plate 25 Fixed seal plate rubber plate 26 Side wall hood 27 Ceiling wall slide seal plate 28 Slide with internal vertical partition wall Seal plate 29 Slide seal plate with vertical partition wall at 30 ends Supplementary club 31 Supplementary winding hook 32 Crane driver's cab 33 Crane operator's eye position 36 Runway girder rail 37 Running wheel 40 Upper slide seal plate 54 Lower slide seal plate 55 axis 91 primary winding of the pinion hanger beam 93 hood 94 small ducts 95 damper 96 spring 97 rolling furnace furnace mouth dust duct 98 ladle 99 rolling furnace 100 main garter 101 run Parkway girder 102 auxiliary winding hook

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

[Procedure correction 6]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

[Procedure Amendment 7]

[Document name to be corrected] Drawing

[Correction target item name] Figure 9

[Correction method] Change

[Correction content]

[Figure 9]

Claims (1)

[Claims] 1. A box-type dust collector having an open lower part, which comprises a seal plate made of a plate body horizontally attached to the lower surface of the main girder and a side plate vertically attached to an outer edge of the horizontal plate body. An overhead crane having a cell and a duct for sucking dust therefrom and connecting it to a dust collector,
It is a plate-like body that is horizontally attached to the bottom surface of the main girder of an overhead crane, and shields dust that rises in the ceiling direction by riding the rising airflow through the gap of the fixed seal plate, avoiding the transverse movement of the crane wire. , One or more sliding seal plates that slide parallel to the traveling direction of the crane,
A vertical rectangular plate-shaped skirt plate that is attached to the sliding seal plate and slides parallel to the traveling direction of the crane; and a horizontal plate member that is attached to the main club and auxiliary club of the overhead crane. A main winding wire and an auxiliary winding seal plate that are provided immediately below the main garter having a hole through which the main winding wire or the auxiliary winding wire traverses, and the main winding wire or the auxiliary winding wire. Overhead crane with dust hood.