JPH0350061B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a method for melting structures such as reinforced concrete and other structures, metal materials such as steel frames, refractories such as fire bricks, and objects to be melted such as rocks. perforation,
This invention relates to a method of cutting and drilling concrete structures, etc. for cutting and demolition, and an apparatus therefor.

[Technical background of the invention and its problems] Conventionally, the tip of one metal wire and the tip of the other metal wire are brought close to each other in front of a nozzle, the tips of each metal wire are melted by an arc, and the melted portion is An invention has been created in which the molten particles are combusted and reacted with oxygen etc. ejected from a nozzle and blown forward to melt and perforate concrete structures, etc.; When using wire rods or metal wires with low rigidity, the bending of the metal wire itself may not be corrected or the metal wire itself may be easily bent, so make sure that the tip of each metal wire is accurately positioned in the designated position in front of the nozzle. There was a risk that the gas would not be fed and that an arc could not be generated.

[Object of the Invention] Therefore, the present invention solves the conventional problems as described above, reliably corrects the bending of the metal material itself, increases the rigidity of the metal material itself, and aligns the tip of the metal material in front of the nozzle. feed accurately to the specified position,
The purpose of this is to reliably generate an arc so that melting and drilling of concrete structures etc. can be performed efficiently and reliably.

[Summary of the Invention] In order to achieve the above-mentioned object, the gist of the invention of the method is to enable the tip of one strip-shaped metal material and the tip of the other strip-shaped metal material to approach and come into contact with each other in front of the nozzle. At the same time, the strip-shaped metal material is fed, the strip-shaped metal material is deformed in the width direction by a forming roll, and the tip of each strip-shaped metal material is melted by an arc generated by an arc generator. Then, the molten particles in the molten part are combusted and reacted with combustion reactants such as oxygen or oxygen and combustible gas ejected from a nozzle, and are blown forward to melt and perforate objects to be melted, such as concrete structures. The gist of the invention of the device is that the tip of one strip-shaped metal material and the other strip-shaped metal material A forming roll that is formed so as to be able to approach and come into contact with the tip, and is attached with an arc generator so that the tip of each strip-shaped metal material 1 is melted by an arc, and deforms the strip-shaped metal material in the width direction. This is due to the fact that the

[Embodiments of the invention] Embodiments of the present invention will be described below with reference to the drawings.

First, each strip metal material 1 is passed through several sets of forming rolls 2 so that the tip of one strip metal material 1 and the tip of the other strip metal material 1 approach and contact in front of the nozzle 5. I will send it to you. At this time, the strip metal material 1 is deformed in the width direction by the forming rolls 2. Next, the arc generator 3 generates an arc between the tips of the metal strips 1 to melt the tips of the metal strips 1. Then, a combustion reactant such as oxygen or oxygen and combustible gas is ejected from the nozzle 5 to burn and react the molten particles in the molten portion of each tip of the strip-shaped metal material 1, and the combustion and reacting molten particles The particles are blown toward the object H to be melted, such as a concrete structure, using the ejection force of the combustion reactant, and the object H to be melted is melted and perforated by the molten particles and the flame of the combustion reactant.

The combustion reactants include oxygen, oxygen, and flammable gas (or gasoline, instead of combustible gas).
A combustible liquid such as kerosene), air and flammable gas (or a flammable liquid such as gasoline or kerosene instead of flammable gas), or air is used, and these are jetted out through a suitably configured nozzle 5. Make it.

In the illustrated example, the strip-shaped metal material 1, which is consumed by combustion and reaction, is rolled up in advance into a roll, and by unwinding it and setting it on the forming roll 2, it is continuously rolled in front of the nozzle 5. It is configured so that the metal strips 1 can be fed, and furthermore, the metal strips 1 can be stacked on top of each other in several stages or arranged in a row so that when one metal strip 1 is consumed, It may be configured such that the next strip metal material 1 is automatically supplied and continuous cutting and drilling operations can be performed for a long period of time. The material, size, etc. of the strip metal material 1 itself can be freely set as appropriate.

In addition, the cross-sectional shape of the tip of the strip metal material 1 when it is deformed in the width direction through several sets of forming rolls 2 can be freely set as appropriate. The tip of the strip metal material 1 and the nozzle 5
If the band-shaped metal material 1 is deformed (for example, deformed into a semicircular arc shape (see Fig. 2), deformed into a substantially dogleg shape, deformed into a substantially U-shape, etc.) so that it can surround the cylindrical core of The combustion reactant ejected from the nozzle 5 can be ejected intensively toward the object H to be melted using the strip metal material 1 as a guide, thereby increasing the melting and perforating ability of the material H. The combustion and reaction of the shaped metal material 1 can be carried out smoothly, and the working efficiency of the cutting and drilling operations can be further improved.

The nozzle 5 is an oxygen combustible gas nozzle 5a that has an oxygen jet port 7 that spouts oxygen supplied from an oxygen cylinder 10 and a combustible gas jet port 8 that spouts flammable gas supplied from a combustible gas cylinder 11.
(See Figure 1), but the high-pressure oxygen nozzle 5b (see Figure 2) that spouts high-pressure oxygen supplied from a high-pressure oxygen cylinder and other configurations depending on the combustion reactant to be spouted can be used as appropriate. Can be used for

The arc generator 3 first melts the tip of the strip-shaped metal material 1 with an arc, then injects a combustion reactant onto it, and stops the generation of the arc when the combustion state of the melted portion can be sufficiently maintained. Alternatively, it can be used to generate an arc continuously to promote the melting of the strip metal material 1, or it can be used to generate an arc intermittently, depending on the work situation. Arcs can be freely generated as appropriate.

The forming roll 2 changes the feeding direction of the strip metal material 1 so that the tips of the pair of strip metal materials 1 can approach each other and the contact position can move along the cylindrical core direction of the nozzle 5. The entire forming roll 2 may be configured to be movable. Furthermore, a pair of strip metal materials 1
The nozzle 5 may be linked to follow the approach of the tip and movement of the contact position.

[Effect of the invention] Therefore, the respective strip metal materials 1 are fed so that the tip of one strip metal material 1 and the tip of the other strip metal material 1 can approach and come into contact in front of the nozzle 5. At the same time, this strip metal material 1 is deformed in the width direction by a forming roll 2, and the tip of each strip metal material 1 is melted by an arc generated by an arc generator 3, and the melted portion is The molten particles are combusted and reacted with a combustion reactant such as oxygen or oxygen and combustible gas ejected from the nozzle 5, and are blown forward to melt the object H to be melted, such as a concrete structure.
Since the holes can be drilled, when the strip-shaped metal material 1 is fed in front of the nozzle 5, the strip-shaped metal material 1, whose curvature has been corrected and whose rigidity has been increased, is prevented from wobbling in the thickness direction and width direction. The tip of one strip-shaped metal material 1 and the tip of the other strip-shaped metal material 1 can be reliably approached and contacted at a predetermined position in front of the nozzle 5 without bending or sagging. , arc generator 3
It is now possible to reliably melt each tip of the strip-shaped metal material 1 with the arc generated by the arc.

In particular, the strip metal material 1 is moved in the width direction by the forming roll 2 so that the tip of the strip metal material 1 on one side and the tip of the other strip metal material 1 can surround the cylindrical core of the nozzle 5. In the case of deformation, the combustion reactant ejected from the nozzle 5 is not diffused by the strip-shaped metal material 1, but is ejected intensively toward the workpiece H. It is possible to effectively utilize the combustion reactant produced by the combustion process, thereby improving the efficiency of melting and drilling. In addition, the tip of the strip metal material 1 becomes easier to melt, and the melting and perforation capacity per unit time can be increased.

By using the rolled metal strip 1, the end of the metal strip 1 can be easily taken out and set on the forming roll 2.

Furthermore, when oxygen is used as the combustion reactant, the metal strip 1 can be reliably combusted and reacted, the work can be done safely without the risk of misfire, and the nozzle 5 can be simplified. In addition, there is no need to consider the ejection ratio with flammable gas, etc., and work efficiency is improved.

Further, in front of the nozzle 5 that spouts combustion reactants such as oxygen or oxygen and combustible gas, the tip of one strip-shaped metal material 1 and the tip of the other strip-shaped metal material 1 are formed so that they can approach and come into contact with each other. , strip metal material 1
An arc generator 3 is attached to melt each tip with an arc, and a forming roll 2 is provided to deform the strip metal material 1 in the width direction.
The tips of the strip metal material 1 can be melted together by the arc generator 3, and the molten particles of this melted portion are transferred to the nozzle 5.
The molten particles are combusted and reacted by the combustion reactants ejected from the material H, and the molten particles undergoing combustion and reaction can be blown off toward the workpiece H. Moreover, it becomes possible to continuously feed the strip metal material 1 to the front of the nozzle 5 by the forming roll 2 and to deform the strip metal material 1 in the width direction smoothly.

In particular, by configuring the entire forming roll 2 to be movable so that the tips of the pair of band-shaped metal materials 1 can approach and contact each other in the direction of the cylindrical center of the nozzle 5, the entire forming roll 2 can be configured to be movable. When melting or drilling a thick workpiece H, even if the working position gradually moves to the back of the workpiece H as the melting or drilling work progresses, the metal strip The tips of the materials 1 can be moved toward the object H to be melted, the heat loss of the molten particles themselves is small, and melting and drilling operations can be performed efficiently.

In addition, if the nozzle 5 is configured to follow the approach of the tips of the pair of strip metal materials 1 and the movement of the contact position, the blowing distance of the molten particles can be kept constant, and the molten particles are ejected from the nozzle 5. This makes it possible to efficiently utilize the combustion reactants that are produced.

As explained above, according to the present invention, the bending of the metal strip can be corrected by the forming roll, the rigidity can be increased, and the tip of the metal strip can be accurately fed to a predetermined position in front of the nozzle. At the same time, it is possible to reliably generate an arc at the tip of the strip-shaped metal material, making it possible to efficiently perform melting and drilling work on the workpiece, making it easy to perform continuous melting and drilling work for long periods of time, and making it easy to automate. This results in excellent effects such as:

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic diagram of the device, and FIG. 2 is a perspective view of the tip of the metal strip. 1... Band-shaped metal material, 2... Forming roll, 3...
...Arc generator, 5...Nozzle, 5a...Oxygen combustible gas nozzle, 5b...High pressure oxygen nozzle, 7...
...Oxygen outlet, 8...Flammable gas outlet, 10...
...Oxygen cylinder, 11...Flammable gas cylinder, H...
...The object to be melted.

Claims (1)

[Scope of Claims] 1. The tip of one strip-shaped metal material and the tip of the other strip-shaped metal material are allowed to approach and come into contact in front of the nozzle, and the respective strip-shaped metal materials are fed. A strip metal material is deformed in the width direction by a forming roll, the tip of each strip metal material is melted by an arc generated by an arc generator, and molten particles of this melted portion are ejected from a nozzle. Melting of concrete structures, etc. characterized by burning and reacting with combustion reactants such as oxygen or oxygen and combustible gas, and blowing it forward to melt and perforate objects to be melted, such as concrete structures. , drilling method. 2. A patent in which a strip of metal material is deformed in the width direction by a forming roll so that the tip of the strip of metal material on one side and the tip of the metal strip on the other side surround the cylindrical core of the nozzle. A method for melting and drilling concrete structures, etc. according to claim 1. 3 In front of the nozzle that spouts combustion reactants such as oxygen or oxygen and combustible gas, the tip of one strip-shaped metal material and the tip of the other strip-shaped metal material are formed so that they can approach and come into contact with each other, and the strip-shaped Melting of concrete structures, etc., characterized in that an arc generator is attached to melt the tip of each metal material 1 with an arc, and a forming roll is provided to deform the strip metal material in the width direction. , perforation device. 4. The concrete structure according to claim 3, wherein the entire forming roll is configured to be movable so that the approach and contact position of the tips of the pair of strip metal materials can be moved along the cylindrical direction of the nozzle. Melting, etc.
perforation device.