Lance cutting method, flame cutting method, and lance pipe

Abstract

An example of a cutting method capable of reducing the amount of carbon dioxide generated is disclosed.SOLUTION: Fusion cutting is performed while supplying hydrogen to the tip of the lance pipe 10. As a result, most of the carbon dioxide generated at the time of blowout reacts with the supplied hydrogen due to the heat at the time of blowout and becomes water (water vapor). Therefore, according to the lance cutting method, it is possible to reduce the amount of carbon dioxide generated.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a lance cutting method, a flame cutting method, a lance pipe, and the like. [Background technology]

[0002] The lance cutting method is a method of melting and cutting an object by utilizing an oxidation reaction between oxygen and a lance pipe whose main component is iron, as described in Patent Document 1. The flame cutting method is a method of melting and cutting an object by utilizing a flame generated by an oxidation reaction between combustion gas and oxygen. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-175472 Summary of the Invention [Problem to be solved by the invention]

[0004] In the lance cutting method and the flame cutting method, a large amount of carbon dioxide is generated during the cutting operation. In view of this, the present disclosure discloses an example of a cutting method that can reduce the amount of carbon dioxide generated. [Means for solving the problem]

[0005] In a lance cutting method for cutting an object by utilizing an oxidation reaction between a lance pipe whose main component is iron and oxygen, the cutting is performed while supplying hydrogen to the tip of the lance pipe. As a result, most of the carbon dioxide generated during cutting reacts with the supplied hydrogen due to the heat generated during cutting to form water (water vapor). Therefore, this lance cutting method can reduce the amount of carbon dioxide generated. [Brief explanation of the drawings]

[0006] [Figure 1]FIG. 2 is a diagram showing an example of a lance pipe according to the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0007] The following "embodiments of the invention" are examples of embodiments that fall within the technical scope of the present disclosure. In other words, the invention-specific matters described in the claims are not limited to the specific configurations and structures shown in the following embodiments.

[0008] (First embodiment) <1. Lance cutting method> This embodiment relates to a lance cutting method. A typical lance cutting method is a cutting method that melts and cuts an object (for example, a concrete structure or a large metal structure) by utilizing an oxidation reaction between a lance pipe, which is mainly composed of iron, and oxygen.

[0009] In the lance cutting method according to this embodiment, the lance pipe is melted while hydrogen is supplied to the tip of the lance pipe. Note that Fig. 1 shows an example of a lance pipe 10 used in the lance cutting method according to this embodiment.

[0010] The lance pipe 10 is a double pipe made mainly of iron and provided with an oxygen passage 11 and a hydrogen passage 12. The oxygen passage 11 is a passage through which oxygen flows, and the hydrogen passage 12 is a passage through which hydrogen flows.

[0011] The hydrogen passage 12 is configured to surround the periphery of the oxygen passage 11. At least before use, the outlet 11A of the oxygen passage 11 is shifted in the ejection direction (the direction of the arrow in FIG. 1) from the outlet 12A of the hydrogen passage 12.

[0012] 2. Features of the Lance Cutting Method According to the Present Embodiment In the lance cutting method according to this embodiment, most of the carbon dioxide generated during cutting reacts with the supplied hydrogen due to the heat generated during cutting to form water (water vapor), and therefore, this lance cutting method can reduce the amount of carbon dioxide generated.

[0013] (Second embodiment) This embodiment relates to a flame cutting method for cutting an object by utilizing a flame generated by an oxidation reaction between combustion gas and oxygen. In this embodiment, cutting is also performed while supplying hydrogen together with the injection of flame, i.e., combustion gas.

[0014] As a result, most of the carbon dioxide generated during fusing reacts with the supplied hydrogen due to the heat generated during fusing to form water (water vapor), which may make it possible to reduce the amount of carbon dioxide generated.

[0015] (Other embodiments) In the above-described embodiment, hydrogen is supplied using a double pipe. However, the present disclosure is not limited to this. That is, the present disclosure may be, for example, a method of fusing while separately supplying hydrogen to the tip of the lance pipe or near the flame. In other words, the method may be a method of fusing while separately supplying hydrogen to the member used for fusing.

[0016] Furthermore, the lance pipe used in the lance cutting method is not limited to the lance pipe shown in Fig. 1. That is, the disclosure is sufficient as long as lance cutting or flame cutting is performed while supplying hydrogen.

[0017] Therefore, a method of lance cutting or flame cutting using a structure other than that shown in the above-mentioned embodiment (particularly a "powder cutting method" in which metal powder such as iron powder is sprayed while cutting) may also be used.

[0018] Furthermore, the present disclosure is not limited to the above-described embodiments as long as it conforms to the spirit of the disclosure described in the above-described embodiments. Therefore, the present disclosure may be a configuration in which at least two of the above-described embodiments are combined, or a configuration in which any of the components illustrated or described with reference numerals in the above-described embodiments is eliminated. [Explanation of symbols]

[0019] 10... Lance pipe 11... Oxygen passage 12... Hydrogen passage

Claims

1. A lance cutting method for melting and cutting an object by utilizing an oxidation reaction between a lance pipe mainly composed of iron and oxygen, A lance cutting method in which the lance pipe is fused while hydrogen is supplied to the tip of the lance pipe.

2. In a cutting method in which an object is melted and cut by flame, A flame cutting method in which hydrogen is supplied along with the injection of flame to melt the material.

3. A lance pipe used in a lance cutting method that uses an oxidation reaction between a lance pipe mainly composed of iron and oxygen to melt and cut an object, The lance pipe is provided with an oxygen passage through which oxygen flows and a hydrogen passage through which hydrogen flows.

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