JPH0763822B2 - Smoke exhaust device of gas cutting machine in continuous casting facility - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a gas cutting machine for cutting a slab used in continuous casting equipment, and in particular, it is attached to a lower portion of a running gas cutting machine to cut a slab during cutting. The present invention relates to a device for collecting and exhausting gas.

(Prior Art) On the slab discharge side of a continuous casting machine, a slab that is continuously fed is cut into a predetermined length by a running gas cutting machine that runs with the slab. Since cutting gas is generated along with cutting, a device for collecting and exhausting this gas is required. As a conventional smoke exhaust device of this type, a duct is embedded in the base portion of the slab delivery path, the space below the torch of the cutting machine is divided into a plurality of partition surfaces, and a damper is provided for each partition to absorb and exhaust smoke. It is known that a smoke exhausting shout is provided below the travel range of the torch, and smoke is constantly absorbed through holes formed on both sides of the shout. In addition, as a simple example, a fixed hood is installed above the torch traveling range, or a cutting machine (torch car)
There is a smoke hood installed at the top that can be moved together with the torch car.

(Problems to be Solved by the Invention) In the conventional smoke exhaust device described above in which the duct is embedded in the foundation part, it is necessary to perform the embedding work of the smoke exhaust duct at the same time as the foundation work of the equipment itself. Not easily applicable to equipment. Further, a smoke exhaust duct and a damper must be provided in the entire torch traveling range, which results in cost increase. For those that install a smoke exhaust shout below the travel range of the torch and constantly absorb smoke, a wide range of smoke exhaust shout is required, and additional equipment such as cutting scale removal equipment (removal by flow) that accumulates on the shout is required. There are drawbacks such as a cost-up and a complicated layout around the torch. When a fixed hood or a movable hood is installed above the cutting torch car, the distance from the cutting position to the hood is long, so complete smoke collection is impossible, and in the case of a fixed hood, a hood is required over a wide range. ,
It will be a cost store.

An object of the present invention is to solve the above-mentioned drawbacks and to provide a smoke exhausting device capable of efficiently and securely collecting and exhausting cutting gas while achieving downsizing as a whole.

(Means for Solving Problems) A smoke exhaust device for a running gas cutting machine according to the present invention has a torch tip on a lower surface of a bogie frame provided with a torch that reciprocates in a direction orthogonal to a traveling direction of the torch car. Of the smoke collecting hood is fixed, the width of the lower opening of the smoke collecting hood is set to a length exceeding the lateral stroke of the torch, and the top opening of the smoke collecting hood is extended toward the torch car through a duct and expansion / contraction. It is made to communicate with a blower outside the machine through a possible bellows type duct, and a water cooling jacket is stretched on the back surface of the smoke collecting hood.

(Example) Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a side sectional view of a smoke exhaust device for a running gas cutting machine according to an embodiment of the present invention, and FIG. 2 is a front view of FIG. A torch car 1 equipped with a cutting blowpipe or torch 5 of a running gas cutting machine travels in the direction of arrow A with a slab on a rail 7 installed above the slab 6 along the flow direction of the slab. . As shown in FIG. 2, a roof-shaped smoke collecting hood 2 is integrally attached to the lower part of the frame of the torch car 1 so as to cover the upper surface 6a of the cast slab 6. As shown in FIG. 1, the front end (front end in the traveling direction) 2a of the smoke collecting hood extends to a position close to the torch 5, and the top 2b of the hood is opened to communicate with an in-machine duct 8 installed in the torch car 1. ing. The duct 8 extends through the frame, and the upper end of the duct 8 is connected to the duct 4 having a bellows-shaped structure which can be expanded and contracted through a bent duct. The bellows-shaped duct 4 is guided to an appropriate exhaust gas fan (not shown) outside and a fixed duct (not shown) outside the machine. The torch 5 oscillates about a shaft support on the upper part of the frame in a direction perpendicular to the traveling direction of the slab 6, but the smoke collecting hood 2 has a lateral width L surrounding at least the oscillating range 1 of the torch. It is attached to the bottom of the frame. Further, the smoke collecting hood 2 is provided with a cooling jacket 3 on its back surface to be water-cooled.

The smoke collecting hood 2 and the in-machine duct 8 move together with the torch car 1. In this case, the bellows-shaped duct 4 expands and contracts following the movement of the torch car, and the cutting occurred at the slab cutting point by the torch 5. The gas is sucked into the smoke collecting hood 2, guided through a fixed duct 8 inside the machine, and a bellows-shaped duct 4 outside the machine to a suitable place outside the machine and discharged.

(Effect of the Invention) In the present invention, since the smoke collecting hood is provided on the lower surface of the frame of the torch car so as to extend to a position immediately near the torch, immediately after the cutting smoke is generated. The smoke can be reliably collected when the cutting smoke is less dissipated, and the smoke collection efficiency can be improved. Since the amount of cutting smoke dissipated is small, the smoke collection hood can be downsized, and the exhaust gas fan can also be downsized. Since the smoke collecting hood is water-cooled by a cooling jacket, the entire torch car including the hood can be protected.

[Brief description of drawings]

FIG. 1 is a side sectional view of a smoke exhaust device for a running gas cutting machine according to an embodiment of the present invention, and FIG. 2 is a front view of FIG. 1 ... torch car, 2 ... smoke collecting hood, 3 ... cooling jacket, 4 ... bellows type duct, 5 ... torch (cutting blow pipe), 6 ... slab, 7 ... rail, 8 ... fixed inside the machine duct.

Claims (1)

[Claims] 1. A smoke collecting hood extending to a position close to the tip of the torch is fixed to the lower surface of a bogie frame provided with a torch that reciprocates in a direction orthogonal to the traveling direction of the torch car,
The width of the lower opening of the smoke collecting hood is set to a length exceeding the lateral stroke of the torch, and the top opening of the smoke collecting hood is blown outside the machine via a duct close to the torch car and an expandable bellows type duct. A smoke exhaust device for a gas cutting machine in a continuous casting facility, further comprising a water cooling jacket stretched on the back surface of the smoke collecting hood.