JPH0216831B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is applicable to structures such as reinforced concrete and other structures, metal materials such as steel frames, refractory materials such as fire bricks, and appropriate coverings such as rocks. The present invention relates to a method for drilling, cutting, and demolishing concrete structures while melting the material.

(Prior art) Conventionally, the above-mentioned melting and drilling of the workpiece has been carried out by gas cutting using a gas torch, or by continuous oxy-combustion of powder such as iron powder using oxygen or compressed air. This is done by a method using a powder lance that feeds the powder to a specific area, or a method using an oxygen lance that feeds oxygen, etc. into a lance made of an appropriate metal tube, and melts and pierces at the tip of the lance where it burns and reacts. Ta. As an example of a device using an oxygen lance, there is a concrete breaking device described in Japanese Utility Model Application Publication No. 1983-53839, which has a spiral shape inside an outer tube made of iron to help with combustion. An inner tube made of iron is penetrated with a filament interposed therebetween, and the opening at the tip of the outer tube and the opening at the tip of the inner tube are approximately aligned, and combustion gas is supplied between the outer tube and the inner tube. , oxygen is supplied into the inner tube, and the outer tube, inner tube, and filament tips that undergo combustion and reaction perform melting and perforation.

(Problems to be Solved by the Invention) However, when using gas cutting, there are disadvantages such as the cutting torch is easily damaged and it is difficult to melt concrete structures, etc. When using powder lance, Powder such as iron powder is continuously fed to the oxygen combustion section, so there are problems with some of the powder scattering around, and the oxygen or compressed air used to feed the powder may backfire and cause an explosion. There was a risk of an accident. In addition, when using an oxygen lance, there is a certain limit to the length of the lance, and the lance wears out relatively quickly, making it necessary to frequently replace the worn lance. Moreover, there are other drawbacks such as the need to temporarily interrupt the work when replacing the lance, and the difficulty of automatically and continuously supplying the lance without interruption.

(Means for Solving the Problems) Therefore, the present invention was created in order to solve the above-mentioned difficulties. Specifically, the present invention has been created in order to solve the above-mentioned difficulties. At the same time, flammable gas is spouted from the flammable gas spout 3 at the tip of the out-mixing nozzle Y,
These are ignited to continue combustion at a position a predetermined distance from the tip of the out-mixing nozzle 1 to form a combustion area. Then, the tip portion of a long metal wire 4 that can be continuously supplied is fed into the combustion zone, and the tip portion of the metal wire 4 is burned and reacted in the combustion zone to be in a molten state. A plurality of molten particles are created by blowing it forward with the jetting pressure of oxygen and combustible gas, and the molten particles continuously created by the continuous feeding of the metal wire 4 and the flame of oxygen and combustible gas create a concrete structure. A method of cutting and perforating the object H to be melted, such as an object, was adopted.

(Example) Hereinafter, the present invention will be explained with reference to illustrated examples.

First, oxygen is ejected from the oxygen ejection port 2 formed at the tip of the outmixing nozzle 1, and combustible gas is ejected from the combustible gas ejection port 3 formed at the tip of the outmixing nozzle 1. Then, these are ignited to continue combustion at a position a predetermined distance from the tip of the out-mixing nozzle 1, thereby forming a combustion area. Next, the tip of a long metal wire 4, which is formed so as to be able to continuously supply oxygen and combustible gas, is sent out from the metal wire feed port 5 into the combustion zone. In the combustion zone, the reaction occurs and becomes a molten state, and the molten part is blown forward with the jetting pressure of oxygen and combustible gas to create a plurality of molten particles, and the molten particles and the flame of oxygen and combustible gas The material to be melted H of the concrete structure is melted and drilled.

The flammable gas is, for example, a slow-burning gas such as propane or butane, and the gas is heated from a position approximately 10 cm to 20 cm away from the tip of the out-mixing nozzle 1.
Allow it to burn with oxygen.

The metal wire 4 that is consumed by combustion and reaction is, for example,
It is configured so that it can be continuously fed to the out-mixing nozzle 1 by winding it onto a reel 10 in advance and unwinding it automatically or manually. Further, the metal wire 4 itself can be made of any suitable material, and its structure may be constructed by twisting a large number of thin metal wires, or any other suitable structure can be used.

The structure of the outmixing nozzle 1 can be freely configured as appropriate. For example, the outmixing nozzle 1 shown in FIGS. 1 and 2 has a metal wire feed port 5 in the center, and an oxygen jet port 2 around it. is provided around the periphery, and furthermore, combustible gas jet ports 3 are arranged around the combustible gas outlet. Incidentally, as in the out-mixing nozzle 1 shown in FIG. 3, a shielding oxygen nozzle 6 is further provided around the combustible gas nozzle 3,
It may be configured so that its combustion power is further increased.
In addition, the out mixing nozzle 1 shown in FIG.
In this method, an oxygen outlet 2 is provided in the center, a plurality of metal wire feed ports 5 are arranged along the periphery of the oxygen outlet 2, and a combustible gas outlet 3 is further provided around the oxygen outlet 2, and the metal wire 4 is It is configured to facilitate combustion and reaction, generate a large amount of molten particles, and complete melting and drilling of the workpiece H in a short time. Incidentally, a shielding oxygen jet port 6 may be provided around the combustible gas jet port 3 of the out-mixing nozzle 1 (not shown).

Note that the out-mixing nozzle 1 is designed to prevent oxygen and combustible gas from leaking to the outside at a portion where the metal wire 4 is fed.

The metal wire 4 is fed from the outside of the outmixing nozzle 1 through the metal wire guide 11 into the combustion area as shown in FIG. 5, which simplifies the configuration of the outmixing nozzle 1 itself. It may be possible to make it possible to achieve this.

(Effect of the invention) Therefore, the present invention provides the out mixing nozzle 1
While spouting oxygen from the oxygen spout 2 at the tip,
Combustible gas is ejected from the combustible gas outlet 3 at the tip of the out-mixing nozzle 1, ignited, and continues to burn at a predetermined distance from the tip of the out-mixing nozzle 1 to form a combustion zone. The metal wire 4 is formed in a long length so that it can be continuously supplied.
The tip of the metal wire 4 is fed into the combustion zone, the tip of the metal wire 4 is combusted and reacted within the combustion zone to become a molten state, and the molten state is blown forward with the jetting pressure of oxygen and combustible gas to create a plurality of metal wires. The object H to be melted, such as a concrete structure, is melted and perforated using the molten particles continuously produced by the continuous feeding of the metal wire 4 and the flame of oxygen and combustible gas. The combustion zone is separated from the tip of the outmixing nozzle 1, and is less susceptible to the effects of heat generated in the combustion zone, so that the outmixing nozzle 1 can withstand continuous welding and drilling work for a long time without being damaged or worn out. Furthermore, the metal wire 4 can be easily and continuously fed into the combustion zone, and the cutting and drilling operations can be performed continuously without interruption. Moreover, it is easy to automatically and continuously feed the metal wire 4.

In particular, since a plurality of molten particles created by blowing the molten part of the metal wire 4 forward and a flame of oxygen and combustible gas melt and perforate, the particles created by the combustion and reaction of the metal wire 4 The molten particles have a high calorific value, and this, together with the flame of oxygen and combustible gas, reduces the amount of heat generated by the melted particles per unit time.
This will further improve the cutting and drilling capabilities of the machine, resulting in improved work efficiency. Moreover, concrete
Melting and drilling of refractory bricks, etc., can be easily performed.
In addition, unlike powder lances, there is no need to worry about powder such as iron powder scattering around and having a negative impact on the human body, and there is also the risk of an explosion caused by backfire in the oxygen or compressed air used to feed the powder. It is a method that allows workers to perform highly safe welding and drilling operations.

[Brief explanation of drawings]

The drawings illustrate the present invention, and FIG. 1 is a longitudinal cross-sectional view of an out-mixing nozzle portion, FIGS. 2 to 4 are cross-sectional views showing embodiments of the out-mixing nozzle, and FIG. FIG. 3 is a longitudinal cross-sectional view of an out-mixing nozzle portion in an example. DESCRIPTION OF SYMBOLS 1...Out mixing nozzle, 2...Oxygen outlet, 3...Combustible gas outlet, 4...Metal wire, 5...Metal wire feed port, 6...Oxygen outlet for shielding, 10...Reel, 11...Metal wire guide , H...object to be melted.

Claims (1)

[Claims] 1 Inject oxygen from the oxygen outlet at the tip of the out-mixing nozzle, and eject combustible gas from the flammable gas outlet at the tip of the out-mixing nozzle, ignite them, and move the device a predetermined distance from the tip of the out-mixing nozzle. The tip of a long metal wire that can be continuously supplied is fed into the combustion zone, and the tip of this metal wire is combusted within the combustion zone. , react to make it into a molten state, blow this molten state part forward with the jetting pressure of oxygen and combustible gas to create a plurality of molten particles, and molten particles that are continuously created by continuous feeding of this metal wire, A method for melting and drilling concrete structures, etc., characterized by cutting and drilling holes in objects to be melted, such as concrete structures, with a flame of oxygen and combustible gas.