JPS605978Y2 - Dust collection equipment for metal cutting work - Google Patents

Description

[Detailed description of the invention] This invention is used for dust collection for outdoor work, such as collecting red smoke generated when oxygen is used to melt down metal that has adhered to the bottom of a ladle or metal that has adhered to a tundish. It is related to equipment.

For example, in steel mills, etc., a large amount of irregularly shaped metal, such as metal stuck to the bottom of the ladle or metal stuck to the tundish, is generated in large quantities. However, elongated ingots like the ingots attached to tanditshu are too large to be used as scrap in converters, etc., so generally the ingots are melted down with oxygen. It is sized appropriately.

By the way, when cutting the above-mentioned metal, iron oxide is generated as so-called red smoke, which not only worsens the working environment but also poses a pollution problem. Red smoke generated during melting is collected and removed.

FIG. 1 is a diagram schematically showing a conventional trolley moving type dust collection equipment, in which a hood 1 is suspended and fixed at a predetermined height, and a dust collection duct 2 is connected to the hood 1. In addition, a cart 3 is movably arranged below the hood 1, and the metal 4 is placed on the cart 3 and transported below the hood 1, where it is fused and the red smoke generated at that time is removed from the hood. The device is designed to be inhaled into one person.

Furthermore, FIG. 2 is a diagram schematically showing a conventionally used hood moving trolley type dust collection equipment, in which a hood trolley 6 is connected to a dust collector (not shown) via a dust collection duct 5. It is configured to be movable on the rails 7, and after the hood cart 6 is moved onto the bare metal 8 placed between the rails 7, fusing work is performed, and the red smoke generated at that time is inhaled by the hood cart 6. It is something.

However, all of the above conventional dust collection equipment
8 and the hoods 1, 6 are horizontally moved to position the base metals 4, 8 directly under the hoods 1, 6, the base metal 4.8 and the hoods 1, 6 are It is necessary to maintain a certain distance between the dust collector and the opening end, so unless the suction air volume of the dust collector is increased considerably, it is difficult to reliably inhale the red smoke generated as the metal is melted. In addition, especially when working outdoors, red smoke may not be able to be inhaled into the hoods 1 and 6 due to the influence of the wind.
In any case, the disadvantage is that a large dust collector with sufficient capacity must be installed, which increases equipment costs.Furthermore, with the conventional dust collection equipment mentioned above, the location where the cutting work is to be performed is specified, so it is necessary to install a large dust collector with sufficient capacity. There were also drawbacks such as poor work efficiency, as it was impossible to carry in and cut the subsequent metal until the metal had been melted and removed.

The object of this invention is to provide a dust collection equipment for metal welding work that can effectively eliminate the above-mentioned drawbacks.

Examples of this invention will be described below with reference to FIGS. 3 to 6.

FIG. 3 is a layout diagram showing an embodiment of this invention, in which a dust collection duct 11 extending to a predetermined work place is connected to the inlet of the dust collector 10, and a butterfly A plurality of branch ducts 13 having gate valves 12 such as valves are provided protrudingly, and a flexible hose 14 is attached to the tip of each branch duct 13, respectively.

The outlet of the dust collector 10 is connected to a chimney 17 through a fan 16 driven by a motor 15, and by driving the fan 16, air containing dust is sucked into the dust collector 10 through the dust collection duct 11. After removing dust here, the clean air is released into the atmosphere from a chimney 17, and a hopper 18 is connected to the lower end of the dust collector 10 via a suitable dust conveying device (not shown). The ducts separated and removed by the dust collector 10 are collected in a hopper 18, from which they are transported by truck or the like.

Further, 19 in FIG. 3 is a smoke collection box, and this smoke collection box 19 has a box shape with an open bottom as shown in FIGS. 4 and 5, and the flexible hose 14 is attached to the side wall of the box. A freely connectable exhaust pipe 20 is protruded, and at the top of the smoke collection box 19 there is an adsorption surface 2 that can be magnetically attracted as a suspension part for suspending the smoke collection box 19.
1 is formed, and furthermore, a smoke collection box 19 is formed on a predetermined side wall portion for an oxygen pipe for workers to enter and exit, or for fusing.
An opening/closing door 22 is provided for insertion into the interior.

In addition, 23 in FIG. 3 is an electric crane normally used to lift the metal 24, and a lifting magnet 25 is attached to the tip of the wire.

Next, to explain the fusing operation of the bullion 24 using the dust collection equipment configured as above, first, any piece of bullion 24 collected in the bullion storage area is attracted by the lifting magnet 25 and lifted. , carry the metal 24 near the tip of one of the flexible hoses 14, and then lift it to the smoke collection box 19 using a lifting magnet 25.
The smoke collecting box 19 is lifted up by suctioning the suction surface 21 of the flexible hose 14, and is placed over the bare metal 24 placed near the tip of the flexible hose 14, thereby storing the bare metal in the smoke collecting box 19.

After connecting the exhaust pipe 20 and the flexible hose 14 and opening the gate valve 12 that communicates with the flexible hose 14, the opening/closing door 22 is opened in the smoke collection box 19 to allow a worker to enter or As shown in FIG. 6, the oxygen pipe 26 for fusing is inserted into the smoke collection box 19 to fusing the bare metal 24.

In this case, the other gate valve 12 is closed to prevent unnecessary air from being sucked into the dust collection duct 11.

However, since the above-mentioned fusing work is performed inside the smoke collection box 19, the fusing work is substantially the same as being performed inside the pipe line communicating with the dust collection duct 11, and is therefore relatively By using a small fan 16, even if the amount of intake air is not as large as shown on the left, the red smoke generated by the blowout can be reliably sucked into the dust collection duct 11, and since the wind is blocked by the smoke collection box 19, the blowout This prevents the red smoke generated by the wind from dispersing into the atmosphere.

While the fusing operation is being carried out as described above, the already fusing metal near the tip of the other flexible hose 14 is attracted by the lifting magnet 25 and lifted up to be transported to a predetermined location. With,
Next, the metal 24 to be cut is transported to the vicinity of the tip of the other flexible hose 14, and preparations for the cutting operation are carried out.

That is, the smoke collection box 19 is connected to each flexible hose 1.
By alternately moving to the tip side of the flexible hose 14 to perform fusing work, and preparing for the next fusing work to be performed at the end of the flexible hose 14 on the side where the fusing work is not being performed, work efficiency is significantly improved. be able to.

In the above embodiment, the dust collecting duct 11 is made of a bark with two protruding branch ducts 13, but in this invention, two branch ducts 13 are provided.
Of course, more than one branch duct may be provided protruding from the dust collection duct 11.

As explained above, according to the dust collection equipment for metal melting work of this invention, the metal to be melted is stored in the smoke collection box, so it can be reliably removed without sucking in a large amount of air unnecessarily. Dust such as red smoke can be sucked into the dust collection duct, and therefore, even if a dust collector with a small suction air volume is used, a sufficient dust collection effect can be obtained, and the cost of equipment can be reduced.

Furthermore, since the metal is housed in the smoke collection box, dust is not dispersed into the atmosphere by wind, and therefore work can be carried out outdoors without deteriorating the work environment even in strong winds.

Furthermore, since a suction surface is formed on the top of the smoke collection box to magnetically attract and lift the dust collection box, lifting and moving the smoke collection box is not conventionally used to move bare metal. This can be done using a lifting magnet, so even if the smoke collection box is moved, the equipment will not be complicated and the work can be done easily.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the main parts of a conventional dust collection equipment, Fig. 2 is a schematic diagram showing the main parts of another conventional dust collection equipment, and Fig. 3 is a layout diagram showing an embodiment of this invention. , FIG. 4 is a perspective view showing the smoke collection box, FIG. 5 is a cross-sectional view taken along the line ■-V in FIG. 4, and FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. 10...dust collector, 11...dust collection duct, 12...gate valve, 13...branch duct, 19...smoke collection box , 20...
Exhaust pipe, 21...adsorption surface, 24...base metal.

Claims (1)

[Scope of utility model registration request] An exhaust pipe is provided protruding from a smoke collection box having an open bottom to cover the metal and accommodate the metal, and a suction surface capable of magnetic attraction is formed on the top of the smoke collection box, and a dust collector is provided. A dust collecting duct for metal melting work, characterized in that a plurality of branch ducts each having a gate valve and detachably connected to the exhaust pipe via a flexible hose are provided in the dust collecting duct connected to the Facility.