KR102072941B1 - Gas cutting torch - Google Patents

Abstract

An embodiment of the present invention relates to a gas cutter. According to one aspect, the gas cutter comprises: a first body having a first inlet port disposed at an upper end, and having a first outlet port disposed at a lower end for a first flow path in which cut oxygen flows to be included therein; a second body having a second inlet port disposed at an upper end, and having a second outlet port disposed at a lower end for a second flow path in which inflammable gas flows to be formed between an inner surface of the second body and an outer surface of the first body; and a third body having a third inlet port disposed at an upper end, and having a third outlet port disposed at a lower end for a third flow path in which low-pressure oxygen flows to be formed between an inner surface of the third body and an outer surface of the second body.

Description

Gas Cutting Machine {GAS CUTTING TORCH}

This embodiment relates to a gas cutter.

In general, the gas cutting machine is a device for preheating the material using the discharged flame and cutting to a predetermined size.

The gas cutter may include a nozzle bundle in which the flame is discharged to the outside.

The nozzle bundle of the gas cutter according to the prior art may include a first discharge port through which cutting oxygen is discharged, a second discharge port through which flammable gas is discharged, and a third discharge port through which low pressure oxygen is discharged. According to the above configuration, the flammable gas and the low pressure oxygen are mixed together and discharged, and the mixed gas may be discharged together with the cut oxygen again.

Generally, in order to cut a thick material, of course, a high earth output flame is required.However, when the supply of low oxygen is increased to increase the earth output of the flame, the supply of flammable gas that flows through a passage such as low pressure oxygen decreases naturally. Therefore, the nozzle bundle of the conventional gas cutter has a problem that is difficult to use to cut the material of more than 1m in thickness.

An object of the present invention is to provide a gas cutter in which low pressure oxygen and flammable gas can be uniformly mixed and the earth output of the flame is enhanced.

Gas cutting machine according to this embodiment, the first inlet is disposed at the upper end, the first body is disposed in the lower end of the first body including a first flow path for the cutting oxygen flows therein; A second body including a second flow path disposed at an upper end thereof, a second discharge hole disposed at a lower end thereof, in which flammable gas flows, and formed between an inner surface and an outer surface of the first body; The third inlet is disposed at the upper end, the third outlet is disposed at the lower end and the low pressure oxygen flows therein, and includes a third body including a third flow path formed between the inner surface and the outer surface of the second body.

Through this embodiment, by forming a flow path through which low-pressure oxygen and flammable gas are separately distributed, it is possible to freely control the supply amount of low-pressure oxygen and flammable gas so that it is easy to control the output of the flame so that the flame is suitable for the thickness of the cut material. Forming the output has the advantage of ensuring the convenience of cutting.

In addition, by arranging a sensor for sensing the flow rate of the gas in each flow path, there is an advantage to ensure the uniformity of the mixed gas.

1 is a perspective view showing a nozzle bundle of a gas cutter according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of a nozzle bundle of a gas cutter according to an embodiment of the present invention.
3 is a cross-sectional view taken along line AA ′ of FIG. 1.
4 is a block diagram of a gas cutter according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the technical idea of the present invention is not limited to some embodiments described, but may be embodied in different forms, and within the technical idea of the present invention, one or more of the components may be selectively selected between the embodiments. Can be combined and substituted.

In addition, the terms (including technical and scientific terms) used in the embodiments of the present invention may be generally understood by those skilled in the art to which the present invention pertains, unless specifically defined and described. The terms commonly used, such as terms defined in advance, may be interpreted as meanings in consideration of the contextual meaning of the related art.

In addition, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention. In this specification, the singular may also include the plural unless specifically stated otherwise in the text, and may be combined as A, B, or C when described as “at least one (or more than one) of A and B and C”. It can include one or more of all possible combinations.

In addition, in describing the components of the embodiments of the present disclosure, terms such as first, second, A, B, (a), and (b) may be used.

These terms are only to distinguish the components from other components, and the terms are not limited to the nature, order, order, or the like of the components.

 And, if a component is described as being 'connected', 'coupled' or 'connected' to another component, the component is not only connected, coupled or connected directly to the other component, but also the component It may also include the case where the 'connected', 'coupled' or 'connected' due to another component between the and other components.

 In addition, when described as being formed or disposed on the "top" or "bottom" of each component, the top (bottom) or the bottom (bottom) is not only when the two components are in direct contact with each other, It also includes the case where one or more other components are formed or arranged between two components. In addition, when expressed as "up (up) or down (down)" may include the meaning of the down direction as well as the up direction based on one component.

1 is a perspective view illustrating a nozzle bundle of a gas cutter according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a nozzle bundle of a gas cutter according to an embodiment of the present invention, and FIG. 3 is A-A of FIG. It is a cross-sectional view.

1 to 3, the gas cutter according to the embodiment of the present invention may include a nozzle bundle 100 is a flame is injected. The nozzle bundle 100 may include a first body 110, a second body 120, and a third body 130.

The first body 110 may have a first passage 111 penetrating in the longitudinal direction at an inner center thereof. A first inlet 112 may be formed at one end of the first body 110 to allow high-pressure cutting oxygen to flow into the first flow passage 111. The other end of the first body 110 may be formed with a first discharge port 113 for discharging the cutting oxygen from the first flow path (111).

An inclined surface may be formed on the inner circumferential surface of the upper end of the first passage 111 adjacent to the first inlet 112 so that the cross-sectional area thereof becomes narrower toward the lower side. A first inclined surface 113a may be formed on an inner circumferential surface of the lower end of the first flow passage 111 adjacent to the first outlet 113 so that the cross-sectional area thereof becomes narrower toward the lower side. The first inclined surface 113a may be formed on the inner surface of the protrusion 113b in which a part of the inner circumferential surface of the first flow passage 111 protrudes inward. Therefore, the flow rate of the cutting oxygen can be quickly formed by the inclined surfaces of the first inlet 112 and the first outlet 113.

The second body 120 may be formed with a second flow passage 121 penetrating in the longitudinal direction in the inner center. One end of the second body 120 may be in communication with the second flow passage 121, and a second inlet 122 may be formed to allow flammable gas to flow therein. The second inlet 122 may be provided in plurality, and may be disposed to be spaced apart from each other along the circumferential direction on the upper surface of the second body 120. The second inlet 122 may be formed to penetrate the inner surface from the outer surface of the second body 120. The inner circumferential surface of the second inlet 122 may be inclined with respect to the outer surface or the inner surface of the second body 120. The other end of the second body 120 may be formed with a second discharge port 123 for discharging the introduced flammable gas.

The first body 110 may be disposed inside the second body 120. The inner surface of the second body 120 may be disposed to face the outer surface of the first body 110. The second flow passage 121 through which the flammable gas flows may be formed between the outer surface of the first body 110 and the inner surface of the second body 120. The first body 110 and the second body 120 may be coupled to each other by welding.

The third body 130 may have a third passage 131 penetrating in the longitudinal direction in the inner center. One end of the third body 130 may be in communication with the third passage 131, and a third inlet 132 through which low pressure oxygen flows may be formed. The third inlet 132 may be provided in plurality, and may be disposed to be spaced apart from each other along the circumferential direction on the upper surface of the third body 130. The third inlet 132 may be formed to penetrate the inner surface from the outer surface of the third body 130. The inner circumferential surface of the third inlet 132 may be inclined with respect to the outer surface or the inner surface of the third body 130. The other end of the third body 130 may be formed with a third discharge port 133 for discharging the low-pressure oxygen introduced.

The second body 120 may be disposed inside the third body 130. The inner surface of the third body 130 may be disposed to face the outer surface of the second body 120. The third flow passage 131 through which the low pressure oxygen flows may be formed between the outer surface of the second body 120 and the inner surface of the third body 130. The second body 120 and the third body 130 may be coupled to each other by welding.

The up and down lengths of the second channel 121 may be shorter than the up and down lengths of the first channel 111 and longer than the up and down lengths of the third channel 131.

Therefore, the nozzle bundle 100 of the gas cutter according to the embodiment of the present invention is between the first body 110 and the second body 120, the second body 120 and the third body 130. Flow paths 121 and 131 through which low-pressure oxygen and flammable gas can be flowed separately are formed in the area therebetween, so that the supply amount of low-pressure oxygen and flammable gas can be freely controlled, whereby the output of flame can be easily controlled. There is an advantage.

The nozzle bundle 100 may have a structure in which flammable gas and low pressure oxygen flow into each of the flow paths 121 and 131 and are discharged through the discharge ports 123 and 133. For this purpose, inclined surfaces 129 and 139 may be formed on the outer circumferential surface of the end of the second body 120 and the inner circumferential surface of the end of the third body 130 for effective mixing of the flammable gas and the low pressure oxygen.

In detail, a second inclined surface 129 may be formed on an outer circumferential surface of the lower end of the second body 120. The shape of the second inclined surface 129 may be formed such that the thickness of the second body 120 becomes thinner toward the lower side. In addition, a third slope 139 may be formed on an inner circumferential surface of the lower end of the third body 130. The shape of the third inclined surface 139 may be formed to protrude to the inside of the third body 130 toward the lower side. The upper end of the third inclined surface 139 may be disposed to overlap in the horizontal direction to form the same height as the upper end of the second inclined surface 129. The lower end of the third inclined surface 139 may be disposed below the lower end of the second inclined surface 129.

In detail, a fourth discharge port 159 through which the mixed gas of the flammable gas and the low pressure oxygen may be discharged may be formed on the lower surface of the nozzle bundle 100. The lower region of the third inclined surface 139 may form a part of the inner circumferential surface of the fourth outlet 159. An inner circumferential surface of the fourth outlet 159 may be formed by an inner surface of the third body 130 and an outer surface of the first body 110.

The fourth outlet 149 may be provided in plurality, and may be disposed to be spaced apart from each other along the circumferential direction from the outside of the first outlet 113.

In addition, the fourth inclined surface 113c may be formed on the lower outer surface of the first body 110 so that the cross-sectional area of the outer surface of the first body 110 decreases downward. Therefore, the mixed gas discharged through the fourth outlet 159 may be guided by the third slope 139 and the fourth slope 113c. For this reason, the mixed gas may be discharged to face the cutting gas discharged through the first discharge port 113 disposed inside. That is, since the first outlet 113 is disposed at the center of the nozzle bundle 100, the fourth outlet 159 is disposed outside the first outlet 113, and thus, the third inclined surface 139. And the mixed gas may be easily mixed with the cutting gas by the fourth inclined surface 113c.

On the other hand, the top height of the fourth inclined surface 113c may correspond to the bottom height of the second body 120.

A mesh network 190 may be provided at the fourth outlet 159 through which the mixed gas is discharged. The mesh network 190 may be formed of a metal material having a plurality of through holes. For this reason, the mixed gas may be more uniformly mixed when passing through the mesh network 190.

On the other hand, a reverse flow prevention portion 170 protruding inward to prevent the reverse flow of the low-pressure oxygen may be formed on the inner surface of the second body 120 forming the inner circumferential surface of the second flow passage 121. The backflow prevention unit 170 may be disposed closer to the lower end of the second body 120 adjacent to the second outlet 123.

The first protrusion 140 and the second protrusion 150 may be formed on the inner circumferential surface of the second passage 121 and the inner circumferential surface of the third passage 131, respectively. The first protrusion 140 and the second protrusion 150 may be alternately arranged in the up and down directions. For example, the second protrusion 150 may be disposed below the first protrusion 140, and another first protrusion 140 may be disposed below the second protrusion 150.

The first protrusions 140 may be provided in plurality, and may be disposed to face each other based on a single second protrusion 150. A plurality of second protrusions 150 may also be provided to be disposed to face each other with respect to a single first protrusion 140.

As shown in FIG. 3, the first protrusion 140 may be disposed on an inner surface of the second body 120 and an inner surface of the third body 130. The first protrusion 140 may protrude inward from an inner surface of the second body 120 and an inner surface of the third body 130. The first protrusion 140 may be provided in plural and spaced apart in the up and down directions. In addition, the plurality of first protrusions 140 disposed at the same height may be spaced apart from each other along the circumferential direction on the inner surface of the second body 120 or the third body 130. Thus, a first flow groove 141 through which the flammable gas or the low pressure oxygen passes may be formed between the adjacent first protrusions 140.

The second protrusion 150 may be disposed on an outer surface of the first body 110 and an outer surface of the second body 120. The second protrusion 150 may be disposed between the plurality of first protrusions 150 spaced apart in the up and down directions. The first protrusion 150 may protrude outward from the outer surface of the first body 110 and the second body 120. In addition, the plurality of second protrusions 150 disposed at the same height may be spaced apart from each other along the circumferential direction on the outer surface of the first body 110 or the outer surface of the second body 120. Thus, a second flow groove 151 through which the flammable gas or the low pressure oxygen passes may be formed between the adjacent second protrusions 150.

The first flow groove 141 may be disposed in an area overlapping the second protrusion 150 in the up and down directions. The second flow groove 151 may be disposed in an area overlapping with the first protrusion 140 in the up and down directions. In other words, the first protrusion 140 and the second protrusion 150 may be disposed so as not to overlap in the up and down directions.

Therefore, the flammable gas and the low pressure oxygen sequentially pass through the first flow groove 141 and the second flow groove 151 and in the second flow passage 121 and the third flow passage 131. Flow rate can be adjusted. That is, by the first protrusion 140 and the second protrusion 150, even if the high-pressure gas flows, there is an advantage that the vibration or shaking is prevented to ensure structural stability. In addition, since the cross-sectional areas of the first flow groove 141 and the second flow groove 151 are smaller than the cross-sectional areas of other regions in the second flow passage 121 and the third flow passage 131, the flammable gas Or there is an advantage that the flow rate of the low pressure oxygen can be increased naturally.

Meanwhile, the first protrusion 140 and the second protrusion 150 are each provided in plural at the same height, and are arranged to be spaced apart from each other along the circumferential direction, but the present invention is not limited thereto. The 140 and the second protrusion 150 are formed in a ring shape to respectively form an inner surface of the second body 120, an inner surface of the third body 130, and an outer surface of the first body 110. It may be disposed on an outer surface of the second body 120. In this case, the first flow groove 141 is between the inner surface of the first protrusion 140 and the outer surface of the first body 110, the inner surface of the first protrusion 140 and the second body 110. It can be formed between the outer surface. In addition, the second flow groove 151 is between the outer surface of the second protrusion 150 and the inner surface of the second body 110, the outer surface of the second protrusion 150 and the third body 130 of the It can be placed between the inner surface. However, even in this case, the first flow groove 141 is disposed to overlap the second protrusion 150 in the up and down directions, and the second flow groove 151 is above the first protrusion 140. It may be arranged to overlap in the downward direction.

An injection cap 180 having an injection hole 185 may be disposed on a bottom surface of the third body 130. The injection cap 180 may be coupled to the bottom surface of the third body 130. An inclined surface 182 may be formed on the inner surface of the injection cap 180 so that the cross-sectional area is narrowed downward. In addition, the injection hole 185 may be disposed in the central area of the lower surface of the injection cap 180 by the lower end of the inclined surface 182.

Therefore, the flammable gas and the low pressure oxygen may be concentrated to the injection area through the injection hole 185. In addition, the injection hole 185 may be disposed to face the first discharge port 113 in the vertical direction.

On the other hand, the cross-sectional area of the injection hole 185 may be formed smaller than the cross-sectional area of the imaginary circle formed by the plurality of fourth discharge port (159). For this reason, the flame may be guided through the inclined surface 182 to be easily discharged through the injection hole 185.

Gas cutting machine according to an embodiment of the present invention, in order to preheat the portion of the material to be cut, flammable gas is discharged through the second passage 121, low pressure oxygen may be discharged through the third passage 131. have. Therefore, the flammable gas and the low pressure oxygen discharge the flame while being discharged through the fourth outlet 159 and the injection hole 185. At this time, if the thickness of the material is thick, so that the output of the flame should be high, the supply of low-pressure oxygen can be increased to provide a suitable control to discharge the flame having a high soil output.

When the preheating of the material is completed, the high pressure oxygen is discharged through the first flow path 111, and the supplied high pressure oxygen blows the preheated portion of the material strongly through the injection hole 185 to cut the cutting area. .

4 is a block diagram of a gas cutter according to an embodiment of the present invention.

3 and 4, the gas cutting machine according to the exemplary embodiment of the present invention may include a controller 300, a valve 400, and a sensor 200.

A first hose, a second hose, and a third hose may be coupled to the first inlet 112, the second inlet 122, and the third inlet 132, respectively. Cutting oxygen may be introduced into the first inlet 112 through the first hose. Flammable gas may flow into the second inlet 122 through the second hose. Low pressure oxygen may be introduced into the third inlet 132 through the third hose.

In addition, the first hose, the second hose, and the third hose may be provided with a valve 400 for adjusting the opening degree of the flow path in the hose, respectively. The flow rate of the fluid provided to the first to third flow paths 111, 121, and 131 through the valve 400 may be adjusted. The valve 400 may be electronically adjusted opening.

On the other hand, the first to third flow paths (111, 121, 131) may be provided with a sensor 200. The detection sensor 200 includes a first detection sensor 201 disposed in the first flow path 111, a second detection sensor 202 disposed in the second flow path 121, and the third flow path ( It may include a third detection sensor 203 disposed in the 131. The detection sensor 200 may be disposed closer to the lower end of the discharge port 113, 123, 133 is formed than the upper end of the nozzle bundle (100).

The detection sensor 200 may detect the flow rate of the fluid flowing in the flow path (111, 121, 131). Therefore, the controller 300 may adjust the opening degree of the valve 400 based on the flow rate information of the gas detected by the detection sensor 200. For example, when the flow rate of the low pressure oxygen detected by the third detection sensor 203 is less than the set flow rate, the control unit 300 is provided to the third passage 131 by adjusting the valve of the third hose. It is possible to increase the flow rate of low pressure oxygen.

In the above description, it is described that all the elements constituting the embodiments of the present invention are combined or operated in one, but the present invention is not necessarily limited to the embodiments. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more. In addition, the terms such as 'comprise', 'comprise' or 'having' described above mean that a corresponding component may be included unless otherwise stated, and thus, other components are excluded. It should be construed that it may further include other components instead. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. Terms used generally, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be interpreted in an ideal or excessively formal sense unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (1)

A first body having a first inlet disposed at an upper end thereof and a first outlet disposed at a lower end thereof, the first body including a first flow path through which cutting oxygen flows;
A second body including a second flow path disposed at an upper end thereof, a second discharge hole disposed at a lower end thereof, in which flammable gas flows, and formed between an inner surface and an outer surface of the first body;
A third body including a third flow path disposed at an upper end, a third discharge port disposed at a lower end thereof, and having a low pressure oxygen flowing therein, the third flow path being formed between an inner surface and an outer surface of the second body;
An injection cap coupled to a lower end of the third body and having an injection hole formed on a lower surface overlapping the first discharge port in an up and down direction;
A first hose having one end coupled to the first inlet and providing the cleaved oxygen to the first flow path;
A second hose having one end coupled to the second inlet and providing the flammable gas to the second flow path;
A third hose having one end coupled to the third inlet and providing low pressure oxygen to the third flow path;
A first valve controlling an opening degree of the flow path in the first hose;
A second valve for adjusting the opening degree of the flow path in the second hose;
A third valve adjusting the opening degree of the flow path in the third hose;
A first detection sensor disposed on an inner surface of the first flow passage adjacent to the first discharge port and configured to sense a flow rate of the cut oxygen;
A second detection sensor disposed on an inner surface of the second flow passage adjacent to the second discharge port and configured to sense a flow rate of the flammable gas; And
A third detection sensor disposed on an inner surface of the third flow passage adjacent to the third discharge port and configured to sense a flow rate of the low pressure oxygen;
A first inclined surface is formed on a lower inner circumferential surface of the first passage adjacent to the first outlet so that the cross-sectional area thereof becomes narrower toward the lower side thereof.
On the outer circumferential surface of the lower end of the second body is formed a second inclined surface so that the thickness of the second body becomes thinner downward,
A third inclined surface is formed on the lower inner circumferential surface of the third body so as to protrude downward from the inner surface of the third body toward the lower side.
The fourth inclined surface is formed on the lower outer surface of the first body so that the outer cross-sectional area of the first body becomes smaller toward the lower side,
An upper end of the second slope and the upper end of the third slope are arranged to overlap in the horizontal direction,
An inner circumferential surface is defined by a lower end of the third inclined plane and a lower end of the fourth inclined plane, and further includes a fourth discharge port through which the mixed gas in which the low pressure oxygen and the flammable gas are mixed is discharged;
The second outlet and the third outlet is disposed above the fourth outlet,
The upper end height of the fourth inclined surface corresponds to the lower end height of the second body,
On the inner surface of the second body forming the inner circumferential surface of the second flow path is provided with a reverse flow prevention portion protruding inward to prevent the reverse flow of the low-pressure oxygen,
The backflow prevention part is disposed close to the lower end of the second body adjacent to the second outlet,
The fourth discharge port is disposed a metal mesh net formed with a plurality of through holes,
The lower surface of the first body, the lower surface of the second body, the lower surface of the third body and the lower surface of the mesh network are arranged to form a virtual same plane,
The backflow prevention part is disposed to overlap the third inclined plane in a horizontal direction,
The upper end of the third slope is disposed higher than the upper end of the first slope and the fourth slope,
The lower surface of the backflow prevention part is disposed to form the same height as the lower end of the second inclined surface,
The lower surface of the backflow prevention part is disposed lower than the upper end of the fourth inclined surface,
The fourth outlet is provided in plurality, spaced apart in the circumferential direction from the outside of the first outlet,
The cross-sectional area of the imaginary circle formed by the plurality of fourth outlets is larger than the cross-sectional area of the injection port,
The cross-sectional area of the injection port is formed larger than the cross-sectional area of the first discharge port,
On the inner circumferential surface of the second flow path and the inner circumferential surface of the third flow path, first and second protrusions are alternately arranged in an up and down direction, respectively.
The first protrusions are provided in plurality, and are disposed to face each other based on a single second protrusion,
The second protrusions are provided in plurality, and are disposed to face each other based on a single first protrusion,
The first protrusion is disposed on the inner surface of the second body and the inner surface of the third body,
The second protrusion is disposed on the outer surface of the first body and the outer surface of the second body,
A first flow groove is formed between the inner surface of the first protrusion and the outer surface of the first body, the flammable gas flows between the inner surface of the first protrusion and the outer surface of the second body,
Between the outer surface of the second projection and the inner surface of the second body, between the outer surface of the second projection and the inner surface of the third body is formed a second flow groove through which the low pressure oxygen flows,
The first flow groove is disposed so as to overlap the upper and lower directions with the second projection,
The second flow groove is disposed to overlap with the first protrusion in a vertical direction,
The control unit adjusts the opening degree of the first valve, the second valve and the third valve based on flow rate information detected by the first detection sensor, the second detection sensor and the third detection sensor,
The gas cutter of claim 2, wherein the up and down lengths of the second flow path are shorter than the up and down lengths of the first flow path and longer than the up and down lengths of the third flow path.

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