JP2817601B2 - Overhead crane with dust collection hood - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting hood mounted on an overhead crane for collecting dust generated during a hot metal transfer operation or the like.

[0002]

2. Description of the Related Art A conventional dust collecting hood of an overhead crane used for a hot metal transfer operation involving generation of dust has been proposed in Japanese Patent Application Laid-Open No. 57-16110. FIG. 9 is a schematic view of a conventional dust collecting hood of a hot metal overhead crane during a hot metal pot transfer operation.

[0003] In the figure, an overhead crane runs on a runway girder 101. Reference numeral 100 denotes a main girder of the crane, and all mechanisms for suspending the ladle 98 are supported by the main girder 100. The ladle 98 is suspended by a main winding hook 92 via a main winding hanger beam 91. Hot metal is charged into the converter 99 by tilting the ladle 98 with the auxiliary winding hook 102.

[0004] A large amount of dust is generated during this charging. A hood 93 and a small duct 94 are provided on the main hanger beam 91, and a large amount of dust generated during the charging passes through the hood 93 and then through the small duct 94, and is collected by a converter furnace port dust collecting duct 97. Dust is collected inside. At this time, the small duct 94 on the side of the main winding hanger beam 91 and the converter furnace dust collecting duct 97 are connected by pushing the damper 95 in which the small duct 94 is held down by the spring 96 by the pressing force of the main winding hanger beam 91. The dust passes through a damper 95 and is collected in a converter furnace dust collecting duct 97.

[0005]

According to this prior art, only dust sucked directly into the converter dust collecting duct and dust sucked into the hood attached to the main hanger beam are collected. However, most of the dust leaks during hot-metal transfer operations involving the generation of a large amount of dust. Also, the main winding hook of the crane can collect dust only at the traversing end.

An object of the present invention is to provide a dust collecting hood of an overhead crane having a dust collecting function capable of collecting a large amount of dust generated in the above-described hot metal pot transfer operation without leaking. I do.

[0007]

SUMMARY OF THE INVENTION An overhead crane having a dust collecting hood according to the present invention comprises a sealing plate composed of a plate mounted horizontally on a lower surface of a main girder and a seal plate formed vertically to an outer edge of the horizontal plate. An overhead crane having a box-shaped dust collecting basin having a downwardly open box-shaped dust collecting basin comprising a hanging side plate and a duct for sucking dust therefrom and connecting to a dust collector. An attached plate that slides parallel to the crane's running direction, avoiding the crane's wire traversing, avoiding the crane's wire traversing, blocking the dust rising in the ceiling direction by the rising airflow through the gap between the fixed seal plates One or more sliding sealing plates, and a vertical rectangular plate-shaped skirt attached to the sliding sealing plates and sliding parallel to the traveling direction of the crane And a horizontal plate-like body attached to the main club and the auxiliary club of the overhead crane, directly below the main garter having a main winding wire or a hole through which the auxiliary winding wire passes along with the main winding wire or the auxiliary winding wire. And a seal plate for main winding and auxiliary winding provided.

[0008]

The dust collecting hood of the overhead crane having a dust collecting function according to the present invention constitutes one large sealing basin by a large number of fixed and sliding seal plates and covers the entire lower part of the overhead crane. Due to this, a large amount of dust generated in hot metal transfer operation etc. rises because of high temperature,
This can be collected without leaking.

Further, since it is constituted by a large number of fixed and sliding seal plates, when dust is not collected, it is drawn under the main girder and does not hinder the operation of the crane. Further, since the high-density dust that rises in the rising air current is collected just above the dust generation source, the dust collector has a small capacity because the dust is high in density.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One 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 a schematic view of the vertical side surface. FIG. 3 is a schematic view of the bottom surface of the dust collecting seal basin of the present invention.

In these figures, reference numeral 3 denotes a blast furnace pot, which is a container for receiving hot metal from a blast furnace in a blast furnace and transporting the hot metal to a steelmaking plant. The capacity of the blast furnace pot 3 is limited to about 150 tons or less, depending on the capacity of the transportation railway. However, the capacity of the charging pot 2 of the converter is determined by accurately measuring the amount of hot metal charged per converter 1 charge. About 300 because it must be able to
Tons. Then, while accurately measuring the weight of the charging pot, two to three cups of hot metal of the blast furnace pot 3 are transferred from the blast furnace pot 3 to the charging pot 2 by this overhead crane. During this pan transfer, a high-temperature rising air current is generated, and the high-density dust rises on the rising air flow. This dust rises and is collected in the dust collecting seal basin.

In these figures, reference numeral 36 denotes a runway girder rail for a crane, on which an overhead crane runs parallel to the building, and a main club 9 for suspending the blast furnace pot 3 is a girder rail of the main girder 8. The blast furnace pan 3 can be moved vertically and horizontally by traversing the building at right angles to the building. The auxiliary hoist hook 31 that tilts the blast furnace pot 3 is supported by the auxiliary hoist club 30, and the auxiliary hoist club 30 traverses the girder rail of the auxiliary girder 15 at right angles to the building. Here the saddle 16 connects the two main girders 8,
It supports two supplementary girder 15.

The side wall hood 26 has an inverted L-shaped cross section, and includes a rectangular horizontal plate and a rectangular vertical plate attached to the outer edge of the horizontal plate so as to hang down. The horizontal plate constitutes the bottom part of the dust-seal box, and the vertical plate constitutes the side wall of the dust-seal box, and collects the updraft containing high-density dust generated during pan transfer. I do. Since the crane's cab 32 is provided far below the lower surface of the main girder 8, the position 33 of the operator's eyes of the crane is far below the lower surface of the main girder 8. The vertical plate does not obstruct the view of the crane operator.

A fixed seal plate rubber plate 25 which is a rectangular horizontal plate is attached to the lower surface of the two main girder 8 and the lower surface of the two auxiliary girder 15, respectively. These constitute the bottom portion of the dust-collecting seal basin, and collect the updraft containing high-density dust like the above.

The main winding wire rope 17 is hung from the main club 9, but the main winding sealing plate 18 provided with a hole through which the main winding wire rope 17 penetrates is attached to the main club 9.
It is attached to the main club 9 by an attachment fitting extending downward from the main club 9. In this way, the main winding wire rope 1
The main winding seal plate 18 and the main winding seal plate 18 traverse integrally with the main club 9, while the main winding seal plate 18 constitutes the bottom portion of the dust collecting seal basin, and removes high-density dust similarly to the above. Collect the ascending updraft.

From the auxiliary club 30 to the auxiliary wire rope 20
The auxiliary seal 3 is provided with a hole through which the auxiliary wire rope 20 penetrates.
It is attached to 0. As described above, the auxiliary winding seal plate 21 constitutes a bottom portion of the dust collecting seal basin while traversing integrally with the auxiliary club 30 in the same manner as described above, and the upward air flow including high-density dust as described above. Collect.

FIG. 8 is a schematic view showing a dust collecting seal measure 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. It is. Since the main winding wire rope 17 hanging from the main club 9 traverses, the gap of the fixed sealing 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 constituting the bottom portion of the dust-collecting and sealing basin has a structure in which the horizontal plate retreats or advances as the main winding wire rope 17 traverses. This situation is illustrated in FIG.
3 and FIG.

FIG. 3 is a schematic view of the bottom surface of the dust collecting seal basin, in which reference numeral 37 denotes a traveling wheel. The slide seal plate with internal vertical partition wall 28 and the slide seal plate 27 on the ceiling wall where the main winding wire rope 17 is located are retracted. In this part, the main winding seal plate 18 seals the rise of dust. Similarly, the auxiliary wire rope 20
The ceiling wall slide seal plate 27 at a certain position is retracted. Since the auxiliary wire rope 20 also traverses, it is configured to retreat or advance as it traverses. Although four sets of the slide seal plate 28 with the internal vertical partition wall and the slide seal plate 29 with the end vertical partition wall are provided, if two sets among them are advanced, the rise of dust can be sealed. The dust rising crowded around the side of the main girder 8 may be thus sealed to the side wall hood 26.

FIG. 4 is a schematic perspective view showing a main part of a slide seal plate 28 with an internal vertical partition wall. When the slide seal plate 28 with the internal vertical partitioning wall retreats, both the horizontal plate portion and the vertical plate are configured to overlap vertically. The upper one is denoted by reference numeral 40 and the lower one is denoted by reference numeral 54 to aid understanding, and the relative positions are also shown in FIG.

FIG. 5 is a schematic perspective view showing a main part of a slide seal plate 29 with a vertical partition wall at an end. When the slide seal plate 29 with the vertical partition wall at the end is retracted, the horizontal plate portion and the vertical plate both have a vertically overlapping structure. The upper part is indicated by reference numeral 40 and the lower part is indicated by reference numeral 54, and is also shown in FIG.

FIGS. 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 are moved backward or forward. FIG. 6 is a rigid cross-sectional view of the drive mechanism as viewed from the traveling direction. FIG. 7 is a vertical cross-sectional view of the driving mechanism as viewed from a transverse direction. In the present embodiment, the electric shaft is connected to the shaft 55 of the pinion, and the
By moving the upper slide seal plate 40 via the ON mechanism,
This shows a method in which the lower slide seal plate 54 is driven via a wire-sheep mechanism having a double speed mechanism. here
The lower slide seal plate 54 is an upper slide seal plate.
It moves twice as long as the moving distance of 40.

Alternatively, a method may be employed in which the upper slide seal plate 40 and the lower slide seal plate 54 are respectively moved backward or forward by screws to make the rotation 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 to provide independent fixed position stop mechanisms. It goes without saying that all of these driving mechanisms are also included in the scope of the present invention.

According to the overhead traveling crane having the dust collecting hood of the present invention, one large sealing basin is constituted by a large number of sealing plates and covers the entire lower portion of the overhead traveling 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 number of fixed or sliding seal plates.
Since the bottom-open box-shaped dust collecting hood is formed, it is possible to completely shield dust riding on the rising airflow despite having a wide opening.

This dust collecting hood is constituted by a large number of fixed or sliding seal plates without any gap, and can efficiently collect dust without entraining secondary air even during a pan transfer operation in which dust is generated. Can be made small and dust can be completely shielded.

[Brief description of the drawings]

FIG. 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 a dust collecting hood according to the present invention.

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

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

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

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

FIG. 9 is a schematic diagram of a pan transfer operation by a conventional overhead crane to which a dust collecting hood is attached.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 dust collector 2 charging pan 3 blast furnace pan 4 iron receiving chamber 5 main winding suspension beam 6 main winding hook 7 dust 8 main girder 9 main club 11 on-machine dust collection duct 12 ground side dust collection duct 14 duct connection device 15 auxiliary girder 16 Saddle 17 Main winding wire rope 18 Main winding seal plate 20 Supplementary wire rope 21 Supplementary winding seal plate 25 Fixed seal plate rubber plate 26 Side wall hood 27 Ceiling wall slide seal plate 28 Sliding seal plate with internal vertical partition wall 29 End Slide seal plate with vertical partition wall 30 Supplementary club 31 Suspension hook 32 Crane 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 Pinion shaft 91 Main hanger beam 93 Hood 94 Small duct 95 Damper Reference Signs List 96 spring 97 converter furnace dust collection duct 98 ladle 99 converter 100 main garter 101 runway girder 102 auxiliary winding hook

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) C21C 1/00 B65G 69/18 B66C 13/00 C21C 5/40 F27D 17/00 105

Claims (1)

(57) [Claims] 1. A box-shaped dust collector having an open bottom, comprising a sealing plate formed of a plate-like body horizontally attached to a lower surface of a main girder and a side plate vertically hanging down and attached to an outer edge of the horizontal plate-like body. An overhead crane having a basin, and a duct for sucking dust therefrom and connecting to a dust collector,
A plate-like body horizontally attached to the lower surface of the main girder of an overhead crane, which shields the dust that rises in the ceiling direction by riding the rising airflow in the gap between the fixed sealing plates, avoiding the crane's wire traversing movement. One or more sliding seal plates that slide parallel to the traveling direction of the crane,
A vertical rectangular plate-shaped skirt plate attached to the sliding seal plate and sliding parallel to the traveling direction of the crane; and a horizontal plate member attached to the main and auxiliary clubs of the overhead crane. And a main winding and auxiliary winding seal plate provided immediately below the main garter having a hole through which the main winding wire or the auxiliary winding wire passes along with the main winding wire or the auxiliary winding wire. Overhead crane with dust hood.