JPS58103973A - Method and apparatus for removing smoke in plasma cutter - Google Patents

Abstract

PURPOSE:To make the whole apparatus compact and reduce equipment cost by installing a collecting device for smoke and dust generated at the time of cutting by a plasma cutter to the main body of the cutter and making it movable with the cutter. CONSTITUTION:When cutting a material 8 by a plasma cutting torch 5, a carriage 6 provided with the torch 5 is mounted on a frame 3 allowing movement, and the main body 1 of the cutter consisting of the frame 3 and saddles 2 attached to it is allowed to travel on rails 4. Dust collectors 10 provided with suction hoods 12, smoke removing ducts 11 are fixed to the body 1 of the cutter, and moved with the main body 1 of the plasma cutter on a material 8 to be cut. Dust and smoke generated at the time of plasma cutting are absorbed to the dust collector 10 from a partition space made by partition plate 9 provided on the surface plate 7 under the material 8 to be cut, and removed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a smoke evacuation method and a smoke evacuation device in a plasma cutting machine. In a plasma cutting machine that is equipped with a movable carriage and that can be arbitrarily moved on a flat surface to perform cutting using a plasma cutting device mounted on the carriage, the lower part of the cutting surface plate that can support the material to be cut is used. partitioned in a direction perpendicular to the driving direction of the cutting machine main body, and a dust collector compatible with the plasma cutting device is attached and fixed to the cutting machine main body, so that smoke from plasma cutting is always kept at the shortest distance at all cutting positions. The present invention relates to a method for exhausting smoke from a plasma cutting machine, characterized in that the smoke can be effectively sucked from a confined space by horizontal partitions, and to an apparatus implementing this method.

Conventionally, for example, Japanese Patent Publication No. 52-52545, Utility Model Publication No. 51-
As shown in Publication No. 42841, the amputated leg IIt is divided into small rooms by a large number of partition plates, and a main duct is connected to each small room via a damper that can be opened and closed respectively, and the damper near the cutting torch is connected as appropriate. A method has been developed to exhaust smoke locally, but this type of method requires a long make duct that spans the entire area of the cutting surface, a damper that connects the main duct and a small chamber, and a mechanism to control its opening and closing. There were drawbacks such as a large number of required equipment, an enormous cost for incidental equipment, and difficulty in putting it into practical use.

The present method relates to a completely new technique developed in view of the drawbacks of the prior art.

To explain the apparatus for carrying out the method of the present invention with reference to the drawings, in Figs.
A parallel book rail 41 is configured to run in the longitudinal direction, and a carriage 6 having a plasma cutting torch 5 is attached to the frame 3 so as to be slidable laterally along the frame 3.

Reference numeral 7 denotes a cutting surface plate capable of supporting a material to be cut 8 such as a steel plate, and the space below this surface plate 7 has several partition plates 9 arranged at regular intervals in a horizontal direction so as to be perpendicular to the rail 4. By arranging them in parallel, several partitioned spaces are constructed.

Next, reference numeral 10 is a dust collector capable of suctioning and processing dust and smoke discharged by plasma cutting, and is fixedly attached to the cutting machine main body 1. Further, this dust collector IC1 has a suction hood 12 attached to it through a smoke exhaust duct 11tl, and this 7-door 12 is constructed so that it can move along the sides of the dual-injection partition plate 9 as the dust collector 10, that is, the cutting machine main body 1 travels. has been done.

In the above embodiment, two dust collectors 10 were used, but one
It is also possible to omit each. Further, as described above, the dust collector 10 may not be mounted on the main body 1, but may be connected to the outside of the machine body, or may be attached to a separate truck that moves in synchronization with the machine body.

Furthermore, as shown in FIG. 3, the lower part of the surface plate 7 is housed in a water tank 13, and the lower part of the partition plate 9 and the hood 12 are installed so as to be immersed in the water of this water tank 13. It is also possible to reduce the area of the lower space and improve the sealing performance of the smoke exhaust, thereby reducing the size of the smoke exhaust device. In addition, when 13 water tanks are used as described above, the dust generated during plasma cutting is submerged in water tank 13 to remove large particles from the smoke and thereby prevent an increase in the atmospheric temperature in the 7-door. This makes it possible to reduce the amount of smoke emitted by dust and improve the smoke exhaust effect.

Also, as shown in FIGS. 4 and 5, the partition plate 9 of the cutting surface plate 7
A suction hood 12m is provided on one side corresponding to the several horizontal spaces formed by the above, and a 7-door 12b capable of spouting clean air discharged from the dust collector 10 is provided on the other side. The hoods 12a12b are connected to the dust collector 10 by a duct 11 to forcefully circulate the exhaust gas airflow, thereby increasing the exhaust smoke suction efficiency.

In the above embodiment, the dust collector 10 is mounted on a part of the body 1, or is mounted on a separate truck that is synchronized with the body 1, but when the traveling distance of the body 1 is short, about 10 to 15 m. As shown in Figs. 6 and 7, a flexible moving duct (11 m) is installed, with the dust collector 10V fixed at a location away from the body 1, and the tip opening of the duct 11 attached to a movable covering belt. The dust collector 10 and the hood 12 may be connected to each other, or a water-seal type portable structure may be used in which the tip opening of the duct 11 is formed into a U shape and a portion of the duct 11 is movable into the water tank. Duct 1 l
It is also possible to communicate the dust collector 10 and the hood 12 by using b%'.

As described above, the method according to the present invention includes mounting a dust collector for exhaust gas treatment on the main body of the cutting machine or installing it separately, and dividing the lower part of the surface plate into several blocks with a partition plate to create a partitioned space. Further, a retractable hood is slidably provided on the side of the partitioned space, and is connected to the suction dust collector, and is moved as the main body moves to suck out smoke from each partitioned space. [
Since it is configured to process the water, it eliminates the need for a long main duct that spans the entire range of the surface plate, a damper that connects each small chamber, and its opening/closing control mechanism, etc., which is required in the past, and the need for incidental equipment is significantly reduced. It has the characteristic that the equipment can be made compact.

[Brief explanation of the drawing]

1 to 7 are simplified illustrations for implementing the method. 1: Cutting machine main body 5: Frame 4: Shi-ru 5 Nido- Chiro: Carriage 7: Surface plate 8: Machine to be cut 9: Partition plate 10: Dust collector 12: 7-16: Water tank Patent applicant Koike Oxygen Industry Co., Ltd. Agent Patent Attorney Shukichi Nakagawa Figure 3 Figure 4 Figure 6 Figure 0 Figure 7

Claims (1)

[Claims] (1) A carriage that can move the rails in a direction perpendicular to the rails is disposed on a main body frame that runs on parallel rails, and a plasma cutting device mounted on the carriage is used to cut a flat surface. In a plasma cutting machine that performs cutting with the upper part movable arbitrarily, the lower part of the cutting surface plate capable of supporting the material to be cut is partitioned in a direction perpendicular to the driving direction of the cutting machine main body, and is compatible with the plasma cutting device. The hood of the dust collector is attached and fixed to the main body of the cutting machine, so that the exhaust gas from plasma cutting can be effectively sucked in at any position during cutting over the shortest distance and from a space confined by horizontal partitions. Smoke evacuation method during plasma cutting. ■ A plasma cutting machine consisting of a main body that runs on V-rails laid in parallel, a carriage that runs on the main body in a direction perpendicular to the rails, and a plasma cutting device mounted on the cough carriage. 1. A smoke evacuation device for a plasma cutting machine, characterized in that a hood is attached and fixed to the main body to suck out dust, fumes, harmful gases, etc. that are generated when the machine is used. (3) A smoke evacuation device for a plasma cutting machine, characterized in that the space below the cutting surface is laterally divided by several partition plates, and the lower part of the cutting surface is immersed in a water tank. . μ) A suction hood is provided at one end corresponding to the horizontal flue formed by the partition plate in the space below the cutting surface plate, and a hood capable of blowing out clean air discharged by the dust collector is provided at the other end, A smoke exhaust system for a plasma cutting machine, characterized in that the two hoods are connected by a duct with the dust collector at the center. (5) Claims characterized in that a suction hood fixed to the cutting machine main body is communicated with a dust collector installed separately from the cutting machine main body through a moving duct such as a flexible duct or a water-sealed duct. A smoke evacuation device in a plasma cutting machine according to item 2.