JP6181843B1 - Lance pipe for oxygen lance - Google Patents

Abstract

To provide a lance pipe for an oxygen lance which can use a thermite reaction as a lance pipe and can remarkably enhance the ability of melt cutting. A metal outer tube 1 and a metal inner tube 2 provided in the outer tube 1 are provided. A plurality of metal wires 3 are provided so as to be in contact with the inner wall of the inner tube 2. A gap between the inner tube 2 and the metal wire 3 is defined as an oxygen channel 4. A gap space 5 is formed between the inner tube 2 and the outer tube 1. The outer tube 1 is configured in a two-layer structure. An iron layer 1 </ b> A is formed outside the outer tube 1. A dissimilar metal layer 1B is formed inside the outer tube 1. The iron layer 1A and the dissimilar metal layer 1B are fixed by pressure bonding. The thermite reaction is configured to occur at the combustion end of the outer tube 1 along the fixed portion. [Selection] Figure 1

Description

  The present invention relates to a lance for oxygen lances used for drilling, cutting, dismantling, etc. while dissolving structures such as reinforced concrete and other structures, rocks, steel frames, refractories, underwater structures, reefs, etc. Regarding pipes.

  Conventionally, as this type of oxygen lance, for example, a metal pipe, a metal pipe, or the like provided inside a steel pipe to improve the cutting ability is generally used. That is, an oxygen lance that drills and cuts various types of objects to be melted with high heat is obtained by igniting a metal wire and a metal tube from the tip of an iron lance pipe and a rapid oxidation reaction that occurs at the tip of the lance pipe. Use high heat. The high heat at the tip of the lance pipe melts the object and blows off the object melted by the pressure of the high-pressure oxygen continuously supplied into the lance pipe.

  Therefore, the lance pipe used for the oxygen lance has been desired to provide a lance pipe using the thermite reaction so that a higher-temperature melting reaction can be obtained. This thermite reaction is a reaction that melts and accelerates the metal oxide and metal aluminum, and aluminum generates a high temperature while reducing the metal oxide. When this thermite reaction is used in a lance pipe, it melts at a very high temperature. Cutting becomes possible.

  Conventionally, a flame rod (Patent Document 1) using this thermite reaction for a lance pipe and a thermite type welding rod (Patent Document 2) using a thermite reaction for a welding rod in the world of welding have been proposed. Has not been successful in desktop theory. Further, in the lance pipes for oxygen lances described in Patent Documents 3 and 4, the thermite reaction and the like are also considered.

Japanese Patent Publication No.53-5262 Japanese Unexamined Patent Publication No. 63-180397 Japanese Utility Model Publication No. 6-213 Japanese Patent No. 3030696

  The lance pipe of Patent Document 1 has a structure in which an aluminum pipe is housed inside a steel pipe as an outer pipe, and an iron wire or an aluminum wire is filled between the aluminum pipe and the steel pipe, and the melting temperature (flame temperature) is about centigrade. It is said that high temperatures of 2,500 to 5,000 degrees can be obtained. However, in such a structure, even if the thermite reaction occurs, it is limited to a short time, and the thermite reaction cannot be sustained. In addition, since it is impossible to predict when the reaction will occur, if a thermite reaction occurs during melt cutting, the melting temperature will rise rapidly, and the melt cutting operation will be extremely dangerous.

  The thermite-type welding rod of Patent Document 2 has a structure in which an iron core is wrapped with a mixture of aluminum and iron oxide, and a magnesium igniter is attached to the tip. Therefore, as soon as magnesium is ignited, there is a possibility that the welding rod will detonate in an instant, and since it has a very dangerous structure, it has never been commercialized.

  Patent Document 3 is a lance pipe for an oxygen lance previously proposed by the present inventor. That is, Patent Document 3 provides a holder mounting portion for supplying oxygen only to the inner tube, and forms a gap space having an oxygen flow path between the inner tube and the outer tube based on the principle of the orifice, thereby reducing a small amount of oxygen. The lance pipe is melted and cut efficiently by pumping a large amount of air and promoting the removal of the work. In addition, by covering the outer side of the outer tube with a covering, the oxidation reaction of the outer tube is suppressed, and the fusing and drilling ability of the tip portion of the lance pipe is enhanced.

  On the other hand, in Patent Document 4, an appropriate metal lance pipe is formed on the outer surface or the inner and outer surfaces with heat resistance treatment for the purpose of calorizing effect, and the tip end portion of the lance pipe is used as a large diameter portion. Is filled with a burning consumable filler. According to this lance pipe, the amount of drilling of the workpiece per unit time can be increased until the filler is consumed at the time of fusing drilling.

  That is, the thermite reaction is a reaction in which aluminum generates a high temperature by reducing the metal oxide when a mixture of the metal oxide and the metal aluminum is ignited. In the prior art, there are examples of using aluminum materials for lances, but there are problems with the lack of shape / mass and the structure / combination for reacting, making it impossible to demonstrate the effect even when put to practical use. It was.

  Therefore, the present invention was created to solve the above-mentioned problems. Conventionally, the thermite reaction is improved by improving the structure / combination for reacting with the insufficient shape / mass and the insufficient thermite reaction. An object of the present invention is to provide a lance pipe for an oxygen lance that can be used as a pipe and can significantly enhance the melt cutting ability of the oxygen lance.

  In order to achieve the above-described object, the first means in the present invention includes a metal outer tube 1, a metal inner tube 2 provided in the outer tube 1 and an inner wall so as to contact the inner wall of the inner tube 2. And an oxygen flow path 4 having a high speed flow path 4A surrounded by the metal wire 3 and a low speed branch flow path 4B formed between the inner tube 2 and the metal wire 3. In addition, in the lance pipe for oxygen lance in which the gap space 5 in which the oxygen flow path is blocked is formed between the inner pipe 2 and the outer pipe 1, an iron layer 1A formed on the outer side of the outer pipe 1, An outer tube 1 having a two-layer structure, which is formed on the inner side of the tube 1 and integrated with a dissimilar metal layer 1B having a difference in ionization tendency with respect to the iron layer 1A by a fixing means by pressure bonding, is formed. When the outer tube 1 burns as the tube 2 burns, a thermite reaction occurs in the iron layer 1A and the dissimilar metal layer 1B. It lies in that the configuration was.

  According to a second means, in the outer tube 1, the iron layer 1A is made of high-purity iron, and the dissimilar metal layer 1B is made of an aluminum material.

  In the third means, an outer gap space 5A and an inner gap space 5B are provided by arranging a high-purity iron middle / outer pipe 6 in the gap space 5 between the outer pipe 1 and the inner pipe 2. Is.

  In the fourth means, the outer pipe 1 superimposes the aluminum pipe forming the dissimilar metal layer 1B inside the metal pipe forming the iron layer 1A, and integrates the polymerized pipes together by pressure bonding means. Thus, the iron layer 1A and the dissimilar metal layer 1B are fixed.

According to the first aspect of the present invention, the outer tube 1 has a two-layer structure in which the iron layer 1A formed on the outside and the dissimilar metal layer 1B formed on the inside are fixed, so that the combustion end portion of the outer tube 1 is formed. Successful generation of thermite reaction. In this thermite reaction, the metal wire 3 and the inner tube 2 were pre-combusted, and the dissimilar metal layer 1B having a low melting point was taken into the molten molecule to promote further reaction with the iron layer 1A, and the effect could be enhanced to the maximum. .

  In addition, since the gap space 5 in which the oxygen flow path is blocked is formed between the inner tube 2 and the outer tube 1, the molten molecules are recombusted in the oxygen flow path when the outer tube 1 is burned, and the molecules are micronized. By reducing the size, the surface area of the molecule is increased, the heat generation amount per unit time is increased, and the high-temperature oxide reduction reaction by the thermite reaction can be stably maintained. As a result, it can be used extremely safely, and it has become possible to easily melt and cut refractory bricks, which have been difficult to melt and cut, and metals such as ferroalloys such as special steel, ferrosilicon, and silicomanganese. .

  Furthermore, since the high-temperature oxide reduction reaction due to the thermite reaction occurs at the combustion end of the outer tube 1, the amount of heat per unit area at the tip of the lance pipe is abundant. Therefore, when the same object is melted, it is possible to melt with a lance pipe having a diameter smaller than that of the conventional lance pipe, and there is an effect that the weight of the lance pipe is reduced and the operability is improved. Moreover, since a high-temperature oxide reduction reaction occurs at the combustion end of the outer tube 1, it becomes extremely easy to handle for an oxygen lance that is melt-cut at the tip of the lance pipe.

  As in claim 2, in the two-layer structure of the outer tube 1, the iron layer 1A is composed of high-purity iron and the dissimilar metal layer 1B is composed of an aluminum material, thereby obtaining a very stable thermite reaction. It is That is, the thermite reaction is a reaction that generates a larger amount of heat as the difference in ionization tendency between aluminum and metal oxide increases. Therefore, when high-purity iron was selected as the material of the iron layer 1A, the oxide reduction reaction was large and the controllable thermite reaction was successfully obtained.

  As in claim 3, by providing the outer and inner gap spaces 5 </ b> A and 5 </ b> B by disposing the inner and outer pipes 6 made of high-purity iron between the outer pipe 1 and the inner pipe 2, the low-speed branch flow path 4 </ b> B is provided. Due to the blocked inner gap space 5B, the molten molecules are re-combusted in the oxygen flow path during combustion of the outer tube 1 to make the molecules extremely small, thereby increasing the surface area of the molecules and increasing the heat generation amount per unit time. It has become possible to stably maintain the high-temperature oxide reduction reaction due to. As a result, it can be used extremely safely, and it has become possible to easily melt and cut refractory bricks, which have been difficult to melt and cut, and ferroalloy metals such as special steel, ferrosilicon, and silicomanganese.

  As in claim 4, the outer pipe 1 is formed by polymerizing the aluminum pipe forming the dissimilar metal layer 1 </ b> B inside the metal pipe forming the iron layer 1 </ b> A, and integrating the polymerized pipes with a crimping means. The outer tube 1 having a two-layer structure can be easily provided. Moreover, since the iron layer 1A and the dissimilar metal layer 1B are fixed, heat transfer can be performed without waste from an aluminum having a low melting point to an iron layer having a high melting point, so that a thermite reaction can be reliably generated.

  As described above, according to the present invention, it is possible to use a stable and stable thermite reaction for the lance pipe, and achieve the initial purpose such that the melt cutting ability of the oxygen lance can be remarkably enhanced.

It is a longitudinal cross-sectional view which shows one Example of this invention. It is a partially omitted cross-sectional view of the present invention. It is a longitudinal cross-sectional view which shows the further developed type Example of this invention. It is a perspective view which shows the use condition of this invention.

  Examples of the present invention will be described below. The present invention resides in the construction of a lance pipe used for an oxygen lance. That is, a metal outer tube 1, a metal inner tube 2 provided in the outer tube 1, and a plurality of metal wires 3 provided in contact with the inner wall of the inner tube 2 are provided. (See FIG. 1).

  The gap between the inner tube 2 and the metal wire 3 is used as an oxygen channel 4, and oxygen is supplied to the oxygen channel 4 from an oxygen cylinder 10 (see FIG. 1). Therefore, when the tip of the lance pipe is ignited with oxygen acetylene P or igniting agent Q (see FIG. 4), the tip of the metal wire 3 or the inner tube 2 burns, gradually spreading to the outer tube 1 side, By setting the gap space 5 to be blocked, the object is melted and cut by the heat of oxidation reaction or heat of redox reaction of the lance pipe. This gap space 5 must be shut off even though it is an oxygen flow path. This method forms the basis of the present invention as a long-term best-selling product over the past 30 years and has been recognized by many users in the world.

  The oxygen channel 4 includes a high-speed channel 4A and a low-speed branch channel 4B (see FIG. 1). The high-speed channel 4A is a relatively wide space surrounded by the metal wire 3, and the low-speed branch channel 4B is a relatively narrow space between the metal wire 3 and the inner tube 2. When oxygen is supplied to the oxygen channel 4, combustion spreads at the tip of the lance pipe in the order of the metal wire 3 and the inner tube 2 that come in contact with oxygen.

  At this time, the flow of oxygen during combustion rotates spirally in the gap space 5 formed between the inner tube 2 and the outer tube 1 (see FIG. 1). The gap space 5 is a space formed between the inner tube 2 and the outer tube 1 and is a space in which an oxygen flow path is blocked so that oxygen is not supplied from the oxygen cylinder 10 (see FIG. 2). When the combustion of the inner pipe 2 that has been supplied with oxygen expands to reach the gap space 5, the melt in the lance pipe and the melt of the object can be discharged to the outside. At this time, the flow of the oxygen flow path 4 supplied from the oxygen cylinder 10 becomes high speed along the gap space 5.

  When the outer tube 1 burns from the inside along with such high-speed rotation of oxygen, a thermite reaction occurs at the fixed boundary portion between the iron layer 1A and the dissimilar metal layer 1B. This thermite reaction occurs at the combustion end of the outer tube 1 as the metal wire 3 and the inner tube 2 burn. Therefore, in the lance pipe of the present invention, an extremely high-temperature oxide reduction reaction is continuously obtained at the tip portion of the outer tube 1, and melt cutting along with the diameter of the lance pipe becomes possible.

  At this time, the greater the difference in ionization tendency between the iron layer 1A and the dissimilar metal layer 1B, the greater the oxide reduction reaction. In the present invention, the iron layer 1A is made of high-purity iron, and the dissimilar metal layer 1B is made of an aluminum material, thereby succeeding in obtaining a controllable thermite reaction with a large oxide reduction reaction. Furthermore, by using high-purity iron also for the material of the inner tube 2 and the metal wire 3, higher-temperature oxidation reaction heat and oxidation-reduction reaction heat can be obtained. Further, materials other than high-purity iron can be selected as the material for the iron layer 1A, the inner tube 2, the metal wire 3, and the like.

The lance pipe shown in FIG. 3 has a larger diameter at the tip, and an inner / outer pipe 6 is arranged in the gap space 5 to provide an outer gap space 5A and an inner gap space 5B that is always blocked. It is a thing. The outer and outer pipes 6 are arranged in the outer gap space 5A that can be controlled for a long time if the outer gap space 5A is cut off, and that the combustion efficiency is maximized if the outer gap space 5A is opened. At this time, the inner and outer pipes 6 are formed so that the outer gap space 5A and the inner gap space 5B are as narrow as possible so as not to contact the inner pipe 2 and the outer pipe 1. The material of Chugai tube 6 and iron layer 1A, the inner tube 2 are formed by even high purity iron material of the metal wire 3. According to such a lance pipe, the added middle and outer pipes 6 and the high-efficiency and low-consumable lance structure formed inside the outer pipe 1 react with the dissimilar metal layer 1B and the iron layer 1A of the outer pipe 1 so that heat conduction is achieved. High efficiency was made possible by applying heat to the iron layer with a high melting point from aluminum with a low melting point without waste.

  Then, by forming a blocked inner gap space 5B between the inner tube 2 and the inner / outer tube 6, the molten molecules are reburned in the oxygen flow path when the outer tube 1 is burned, thereby minimizing the molecules. As a result, the surface area of the molecule is increased, the amount of heat generated per unit time is increased, and the high-temperature oxide reduction reaction by the thermite reaction can be stably maintained. As a result, it can be used extremely safely, and it has become possible to easily melt and cut refractory bricks, which have been difficult to melt and cut, and metals such as ferroalloys such as special steel, ferrosilicon, and silicomanganese. .

  And since the diameter of the outer tube | pipe 1 from which a thermite reaction is obtained is enlarged, it becomes possible to increase the combustion power of a lance pipe, and it becomes possible to fuse a bigger to-be-cut workpiece. Thus, the change of the diameter of the outer tube 1 and the inner tube 2, the ratio of the thicknesses of the iron layer 1A and the dissimilar metal layer 1B, and the like can be arbitrarily changed.

  As a specific means for manufacturing the outer pipe 1, there is a method in which an aluminum pipe for forming the dissimilar metal layer 1B is polymerized inside the metal pipe for forming the iron layer 1A, and the superposed pipes are integrated by a pressure bonding means. . By thus pressing and integrating the iron layer 1A and the aluminum layer 1B, heat conduction gives heat from the aluminum layer 1B having a low melting point to the iron layer 1A having a high melting point without waste, and a stable thermite reaction is obtained. It is done. Also, other means can be used as the means for manufacturing the outer tube 1.

  In the gap space 5 shown in FIGS. 1 and 3, in order to block the oxygen flow path so as not to flow into the gap space 5 of the outer gap space 5A and the inner gap space 5B, for example, the outer tube 1 is added to the inner tube 2. Tightening processing, caulking processing of the outer tube 1 to the inner / outer tube 6, means for limiting the oxygen supply port of the lance holder 11 connected to the lance pipe to the inner tube 2, or a physically closed portion in the gap space 5 Can be selected from any means such as a means for partially providing

  In addition, each structure of this invention is not limited to the example of illustration, The change of materials, such as the iron layer 1A, the inner tube 2, the metal wire 3, etc., the adhering means of the iron layer 1A and the dissimilar metal layer 1B, etc. Changes are possible within a range that does not change the gist.

DESCRIPTION OF SYMBOLS 1 Outer pipe 1A Iron layer 1B Dissimilar metal layer 2 Inner pipe 3 Metal wire 4 Oxygen flow path 4A High speed flow path 4B Low speed branch flow path 5 Gap space 5A Outer gap space 5B Inner gap space 6 Middle outer pipe 10 Oxygen cylinder 11 Lance holder

Claims (4)

  A high-speed flow path surrounded by a metal wire, comprising: a metal outer tube; a metal inner tube embedded in the outer tube; and a plurality of metal wires mounted in contact with the inner wall of the inner tube. An oxygen lance having an oxygen flow path having a low-speed branch flow path formed between the inner pipe and the metal wire, and having a gap space between the inner pipe and the outer pipe, in which an oxygen flow path is blocked. In a lance pipe, a steel layer formed on the outside of the outer tube and a dissimilar metal layer formed on the inside of the outer tube and having a difference in ionization tendency with respect to the iron layer are integrated by means of fixing by pressure bonding. A lance pipe for oxygen lances comprising an outer pipe having a layer structure, wherein a thermite reaction occurs in the iron layer and the dissimilar metal layer when the outer pipe burns with the burning of the metal wire and the inner pipe .   The lance pipe for oxygen lances according to claim 1, wherein in the outer pipe, the iron layer is made of high-purity iron, and the dissimilar metal layer is made of an aluminum material.   The lance pipe for an oxygen lance according to claim 1, wherein an outer gap space and an inner gap space are provided by arranging a high purity iron middle / outer pipe in the gap space between the outer pipe and the inner pipe.   The outer pipe is formed by polymerizing an aluminum pipe forming the dissimilar metal layer inside a metal pipe forming the iron layer, and integrating the polymerized pipes with a crimping means to thereby integrate the dissimilar metal layer and the iron. The lance pipe for oxygen lances according to any one of claims 1 to 3, wherein the layer is fixed.

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