KR100208050B1 - Method and device of fumes exhaust - Google Patents

Abstract

In the case of forming a cutting space in the lateral direction in the cutting machine, particularly the plasma cutting machine, since all the dust flows toward the suction port regardless of cutting at any position in the cutting space, the vicinity of the suction port of the member to be processed, The deposition amount increases.

The present invention relates to a cutting apparatus which cuts a rail by a cutting torch traversing on a main body of a rails provided in parallel and a cutter running on the rail in order to discharge the dust, The suction duct and the dust collector are selectively connected to each other so as to correspond to the cut region where the cutting is performed by connecting the suction ducts independently connected to the respective cutting spaces to the cutoff region by forming a cut space in the parallel and perpendicular direction divisions It is.

Description

Flue gas exhaust system and exhaust system

FIG. 1 is an overall perspective view of a plasma cutter according to an embodiment of the present invention. FIG.

Fig. 2 is an explanatory view of a platen and a suction duct. Fig.

FIG. 3 is a schematic diagram of a duct selector. FIG.

FIG. 4 is an explanatory view of the operation of a double rod type air cylinder of the duct selection device. FIG.

FIG. 5 is an explanatory view of a platen and a flue gas purifying apparatus according to Embodiment 2; FIG.

FIG. 6 is a perspective view illustrating the vicinity of the suction hood according to the second embodiment. FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

1: Plasma cutting machine 2: Plasma cutting machine main body

3: Carriage 4: Plasma torch

5: Cutting space 6: Plate

7: Workpiece 8:

9: suction duct 10: suction hood

11: duct selection device 12: bracket

13: Double rod type air cylinder 15:

16: Girder

[Object of the invention]

TECHNICAL FIELD The present invention relates to a flue gas treating method and a flue gas treating apparatus for sucking dust, fumes, and the like generated when a workpiece such as a steel plate is cut by a gas processing plasma processing method, a laser processing method or the like.

[TECHNICAL FIELD OF THE INVENTION AND RELATED ART OF THE SAME]

Methods for cutting steel plates, stainless steel sheets, and the like include a gas processing method, a plasma processing method, and a laser processing method.

In most of these methods, the workpiece is heated by a plasma arc or a laser beam, and auxiliary oxygen gas is blown onto the processing part to melt and burn the workpiece, blowing the melt and the oxide as physical energy of the oxygen gas and the plasma jet, Advance the cutting.

However, especially in plasma cutting, it is absolutely necessary to collect dust because a large amount of oxidation products are scattered in the surrounding air by the dust, and fumes such as smoke are generated.

Conventionally, various inventions have been made in order to improve the simplicity of the structure of the dust collecting efficiency device and the maintenance property.

Many of them are divided into a plurality of cutting regions by a plurality of plates in the lengthwise direction of the base plate to form a cutting space and sucked from the end or the center of the cutting space where the cutting is performed.

An example is shown in Japanese Patent Publication No. 53-25305, which has a central long duct in the longitudinal direction at the center of the bottom of the plate, and a connecting portion between the cutting space and the central duct is closed by a damper capable of opening and closing , The damper of the cutting space where the cutting is performed is configured to be opened.

The applicant of the present invention invented a device that fixes a dust collector, a suction hood and a blowing hood to a main body of a plasma cutting machine and sucks air from one side of the cutting space and simultaneously supplies air from the other side in a publication of Japanese Patent Application Publication No. 60-43231 I have posted it.

According to the present invention, in general plasma cutting at all positions of cutting, flue gas is taken in the shortest distance in the lateral direction, and effective suction is obtained in the space defined by cutting.

[Technical Problem]

However, the above-described technique is complicated, expensive, and difficult to maintain because of the damper and its opening and closing facilities.

In addition, dust may accumulate in the switchgear, causing malfunction.

In the case of forming the cutting space in the lateral direction in cutting in the longitudinal direction, there is a phenomenon that when dust is cut at a certain position in the cutting space, all the dust does not pass through the inlet and collects in the workpiece which is the upper surface of the cutting space. The amount of dust adhered to the lower portion of the work piece of the workpiece increases.

Therefore, after the cutting operation, the worker needs to remove the attached dust.

This phenomenon is particularly noticeable when a large number of cuts are made in the same cutting space, especially when cutting small members.

[Structure and operation of the invention]

Here, the related flue gas treating apparatus of the present invention is a flue gas treating method for sucking dust and fumes generated by cutting with a cutting torch traversing over a main body of a rail running on parallel rails by a dust collector, A space is formed by a partition which is parallel and perpendicular to the rail, and dust and fumes generated at the time of cutting are sucked in the cutting space.

Further, the suction ducts are provided for each cutting space and connected to the outside of the cutting area, and the end portions of the suction ducts are arranged in the order corresponding to the arrangement of the cutting spaces, and the suction hoods connected to the dust collectors are connected The suction duct is selectively connected in accordance with the movement of the cutting torch, and suction is continuously performed from the end of the suction duct corresponding to the cutting space where the cutting is performed.

The flue gas treating apparatus according to the present invention is characterized in that when a cutting operation is performed in a cutter body consisting of a cutter body running on parallel rails and a cutter mounted on the cutter body and a carriage running in a direction orthogonal to the rail, , And the exhausting device which sucks dust and fumes generated is constituted a cutting space of the "rice" phenomenon made up of the partition provided with the rails parallel and orthogonal to each other in the cutting area by the torch, The suction duct is independently connected to each suction port and connected to the outside of the cut region, and the suction hood connected to the dust collector is connected to the suction duct to perform the flue gas discharge.

The opening portions of the suction ducts are arranged in the order corresponding to the arrangement of the connected cutting spaces, and a moving means for moving the suction hood connected to the dust collector is provided so that the suction hood In correspondence with the movement of the cutting torch, each of the suction hoods is connected to the opening of the preceding duct continuously in the space according to cutting.

[Example]

The first embodiment of the present invention will be described in detail with reference to the drawings.

1 is a perspective view of a main body of a plasma cutting machine, Fig. 2 is a view for explaining a platen and a suction duct, Fig. 3 shows a duct selecting device, Fig. 4 Fig. 2 is a diagram illustrating the operation of the rod type air cylinder of the duct selection device.

1, the plasma cutting machine 1 is provided so that the main body 2 of the plasma cutting machine can run on the rails 2a and 2b provided in parallel and can move in the parallel direction of the rails Do.

The carriage 3 on which the plasma torch 4 is mounted is allowed to move in a direction perpendicular to the rails (hereinafter referred to as the horizontal direction) on the plasma main body 2.

That is, it is possible for the plasma cutter main body 2 and the carriage 3 to move appropriately so that the plasma torch 4 can perform the cutting operation to an arbitrary position within a predetermined range.

A dust extracting device 18 and a suction hood 10 are attached to the main body 2 of the plasma cutting machine and a duct selecting device 11 is connected to the front side of the suction hood 10.

A bracket 12 for supporting the duct selecting device 11 and an air cylinder 13 of a double rod type for moving the duct selecting device 11 are also attached to the main body 2 of the plasma cutting machine.

A table 6 is provided between the rails 2a and 2b, that is, in a space below the cutter main body 2, and the table 6 is a partition 17 provided on the girder 16 .

Therefore, the space in the table is divided into a shape of 'rice', and when the material to be cut 7 is placed on the table 6, a closed cutting space 5 is formed.

It is necessary to consider the upper mounting pitch of the partitions supporting the member to be processed according to the size of the member to be processed and the size of the member to be cut (size of the member after cutting).

A suction port (8) is provided in the girder (16) under each cutting space (5).

The suction port 8 is provided so as to protrude vertically from the girder 16 and the upper opening thereof is provided with a suction port 15 so as to prevent penetration of the plasma cutting slag falling from above.

The suction duct 9 connected to the suction port 8 by the lower surface of the girder 16 is connected to the lower surface of the girder 16 and connected to the outside of the surface plate 6, And the openings thereof are arranged in parallel in the longitudinal direction.

The suction duct 9 has a structure separable from the surface plate 6 and can be separated from each other with ease in supporting the surface plate 6 and facilitates the treatment of impurities generated at the time of cutting.

A duct selecting device 11 is provided at a position facing the suction duct 9 so as to select the suction duct 9 connected to the suction port 8 of the cutting space 5 during the cutting operation, To the hood 10 connected to the hood 10.

The configuration and operation are described here.

3, the duct selecting device 11 is constituted by an endless rotating belt 24 attached to the driving shaft 22 and the driven shaft 23 with its side surface vertically installed.

In the endless rotating belt 24, three belt opening portions 25 are provided at equal intervals, and the facing of the suction duct 9 is connected to a passage for sucking the exhaust gas.

The drive shaft 22 is connected to a rack 28 for driving the plasma cutter main body so as to be interlocked with the main body movement amount detection gear 26. The longitudinal movement amount of the plasma cutter 2 and the movement of the endless rotation belt 24 The ratio of the connection pulleys is set.

Although three openings 25 of the belt according to the present embodiment are provided, installation should be considered in two or four locations depending on the relationship between the length of the duct selection device 11 and the width of the suction duct.

The lower and rear surfaces of the duct selecting device 11 should be sealed and free from interference with each endless rotating belt.

A portion of the upper portion of the duct selecting device 11 where the suction hood 10 is connected and partially closed and the both sides of the suction hood 10 are not closed is closed by the elasticized belt cover 27. [

The stretchability belt cover 27 has one end connected to the end of the suction hood 10 and the other end connected to the end of the duct selecting device 11. [

Even if the relative positions of the suction hood 10 and the duct selecting device 11 are changed, the elastic bar cover 27 is expanded and contracted to seal the upper surface of the duct selecting device 11 and sucked from the suction duct 9 And connects the exhaust passage of the hood 10 to the exhaust passage.

The suction hood 10 is connected to a dust collector 18 mounted on the main body of the plasma cutting machine. From this structure, the suction duct 9 and the suction hood 10 are connected.

The duct selecting device 11 is fixedly supported on the duct selecting device holder 19. [

The bracket 12 of the leg portion of the plasma cutter main body 2 and the double rod type air cylinder 13 are connected and the duct connecting device holder 19 is moved in the longitudinal direction to the guide 20 of the bracket 12 It is attached to be possible.

In addition, the air cylinder 13 of both side rod type expands and contracts, and the duct selection device holder 19 is movable in the longitudinal direction.

The various operations of the duct selection device 11 for selecting a duct will be described.

In the present embodiment, the base plate is divided horizontally into four, and the cutting space 5 seen in the drawing is referred to as (5a), (5b), (5c) and (5d) for explanation and the connected suction ducts (9a), (9b), (9c) and (9d).

When the longitudinal cutting position in the cutting space 5b moves within the same cutting space, for example, as shown in FIG. 2, the plasma cutter main body 2 and the duct selecting device 11 are also moved in the longitudinal direction, The suction duct is in the state of (9b).

At this time, the endless rotation belt 24 moves in the reverse direction in accordance with the amount of movement of the main body movement amount detecting tooth 26 and the drive shaft 22 combined with the lak 28, The position is changed to continue the flue gas from the suction duct 9b.

In the longitudinal direction, the endless rotary belt 24 is moved to the next cutting space 5 where the cutting position is not shown in the drawing, and the endless belt 24 is moved in the openings 25 are exposed and connected to the cutting space 5 after the cutting is proceeded and connected to the suction duct.

Then, when the cutting is performed at the boundary of the cutting space, the two pieces of cutting space are temporarily blown into the two cutting spaces.

As the cutting position moves away from the boundary of the cutting space, the front opening 25 is closed because it rotates and enters the rear surface of the duct selecting device 11.

When the cutting position moves in the lateral direction and moves to another cutting space, the duct selecting device 11 is moved step by step by the double rod type air cylinder 13.

For example, when the cutting position moves from the cutting space 5a to the cutting space 5b in the second drawing, a conversion signal is generated by the position detecting device of the plasma torch 4 which is not shown in the drawing, Moves from the shape of 13a shown in FIG. 4 to the shape of 13b and moves the duct selecting device 11 to perform flue-gas treatment to change the suction duct from 9a to 9b.

When the cutting position is moved to the cutting spaces 5c and 5d as described above, the air cylinder 13 of the double rod type is in the form of (13c) and (13d) And suction can be performed.

The position detecting device of the torch can also detect the position by the limit switch and the laser sensor, or in the case of the NC control method, there are various methods such as detecting the switching signal directly from the data.

As described above, since the flue gas is exhausted from the suction duct 9 connected to the cutting space 5 where cutting is performed, the efficiency is further improved and the amount of dust and fume adhered to the member 7 to be processed .

A second embodiment according to the present invention will be described with reference to FIG.

The same elements as those in the first embodiment are denoted by the same reference numerals, and a description thereof will be omitted.

Fig. 5 shows a schematic view of the platen and a flue gas purifier in the embodiment (2), and Fig. 6 is a perspective view illustrating the vicinity of the suction hood.

In the second embodiment, the surface plate 6 is constructed by dividing the partition wall 17 on the girder 16 longitudinally and horizontally, as in the first embodiment.

A workpiece 7 is provided on the base 6 to form a closed cutting space 5 and a suction port 8 is provided at a lower portion of the suction port 5 at the bottom of each cutting space 5 have.

The suction ducts 37 connected to the suction port 8 are connected to the lower portion of the girder 16 and extend to the outside of the surface plate 6 and are parallel to each other in the horizontal horizontal direction of the surface plate 6 with the openings facing upward.

The order of the lateral positions of the cutting space 5 and the order of the lateral positions of the openings of the suction ducts 9 connected to the respective cutting spaces 5 then coincide.

A dust collector 18, a carriage 3 on which a plasma torch 4 is mounted, and a hood carriage 31 are provided on the main body 2 of the plasma cutting machine.

The hood 31 and the bogie 31 are capable of being horizontally moved on the main body 2 of the plasma cutter and support the suction hood 30.

The suction hood 30 has an opening having the same shape as that of the opening of the suction duct 9 and is connected to the dust collector 18 through a flexible hose and is attached to the hood bogie 31. The hood bogie 31 It is possible to move the flue gas position together with the movement of the flue gas.

In addition, as shown in FIG. 6, a protection plate 38 is provided around the opening of the suction hood 30 in the same plane as the opening surface.

The prevention plate 38 is provided on both sides in the longitudinal direction with a length equal to the length of the opening of the suction hood 30 and on the both lateral sides with the same width as the opening of the suction hood 30.

This is because the state of the suction duct 9 and the suction hood 30 in parallel are blocked by the external air in the suction duct 9 in which the suction is in progress under any condition.

On the main body 2 of the plasma cutting machine, a drive gear 33 and a driven gear 32 for driving the hood truck are installed.

A drive transmission member 35 is connected between the drive gear 33 and the driven gear 34 and a drive transmission member 35 is connected between the drive gear 33 and the driven gear 34. The drive gear 35 is connected between the drive gear 33 and the driven- And a transmitting member 36 is connected.

The drive transmission member 35 by the drive gear 33 and the drive transmission member 36 by the hood bogie are configured such that the drive transmission member moves at a predetermined ratio due to a different diameter of the connected gear.

In addition, each drive transmitting member has various types such as a V-belt, a timing belt, a chain, and a gear, and accordingly, an appropriate one is selected in consideration of the size of the apparatus.

The drive transmitting member 35 is connected to the carriage 3 on which the plasma torch 4 is pierced and transfers the driving force to the driving gear 33 when the cutting operation is proceeded to move the carriage 3 in the lateral direction.

The hood replacement moving drive transmitting member 36 is connected to the hood carriage 31 and moves the hood carriage 31 with the carriage 3 at a constant rate as the carriage 3 moves.

In addition, when the carriage 3 moves in the lateral direction, the suction hood 30 moves in the same direction, and is configured to discharge the suction duct 37 corresponding to the cutting space 5 during the cutting operation.

Further, in this transverse moving method, other devices for movement such as the operation of an air cylinder or the like can be conceived in accordance with the signal of the torch as in the first embodiment.

In addition, although the cutting apparatus is described as using the plasma cutting apparatus according to the present embodiment, it can also be applied to a gas cutting machine and a laser cutting machine.

In addition, although the front panel is divided into four parts in the lateral direction, the present invention is not limited thereto, and it is preferable to divide the front panel into appropriate numbers according to the size of the front panel.

In the first embodiment, the double rod type air cylinder is used as the moving means of the duct selection device. However, it is also possible to realize the same operation by using hydraulic cylinder, wire, .

[Effects of the Invention]

As for the flue gas treating method and the surface plate according to the present invention, as described above, it is possible to form the cutting space defined by the partition in the longitudinal and transverse directions of the table, to individually perform suction in each of the cutting spaces, And it was constructed so as to be able to smoke out from the center.

Here, the range in which the dust and fume generated during cutting can be divided in the lateral direction, and suction is performed in a limited space.

Therefore, the efficiency of flue gas rising, the range in which each flue gas contacts the workpiece is reduced, and it is possible to reduce the amount of dust and fume adhering to the workpiece.

Further, the suction duct and the surface plate can be separated from each other, and the surface plate is divided into several pieces in the longitudinal direction, thereby facilitating maintenance.

Claims (4)

A cutting-out method capable of sucking dust and fumes generated when a cutting operation is performed along a cutting torch traversing on a rail-mounted rails provided on a parallel rail by a dust collector, Wherein a space is formed by a partition that is parallel to and perpendicular to the rails, and dust and fumes generated during cutting are sucked into respective compartments in the respective cutting spaces. The venting method of claim 1, wherein the suction ducts (Duct) independently connected to the suction ports provided in the respective partition spaces are connected to the outside of the cutout area, and the openings of the suction ducts are arranged in the order corresponding to the arrangement of the cutoff spaces And the suction hood connected to the dust collector is interlocked with the cutting torch so that the suction hood is selectively connected to the opening of the suction duct corresponding to the cutting space according to the progress of cutting. A cutting machine body running on parallel rails and a cutter composed of a cutting torch comprised of a carriage running vertically on the rail and a cutting torch mounted on the cutter body to suck dust and fumes generated during cutting operations Wherein a suction port is provided in each cutting space and a separate suction duct is provided outside the cutting area in a cutting area formed by the cutting land, And a hood connected to the dust collector is connected to the front duct so that the flue gas is exhausted. The opening portions of the suction ducts outside the cut region of the flue gas purifying apparatus according to claim 3 are provided with means for moving the dust collecting hood connected to the arrayed high dust collector in the order corresponding to the arrangement of the connected cutting spaces, And the cutting chambers, which are changed in accordance with progress of cutting with each suction hood, can be continuously connected to the opening of the suction duct.