JPH0375707B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention is directed to combustion of the tip of a lance with oxygen,
Using reaction heat, it can drill, cut, and melt structures such as reinforced concrete and other structures, metal materials such as steel frames, refractories such as firebrick, rocks, iron ingots, and metal ingots while melting them. This invention relates to a method of cutting and drilling using an oxygen lance for demolition, and an apparatus therefor.

(Prior art) Conventionally, oxygen supplied through the lance causes the tip of the lance to burn and react, and the combustion and reaction heat at the tip of the lance is used to appropriately melt the object to be melted. This type of oxygen lance for drilling holes is designed to blow back unnecessary molten material (slag) generated from the object to be melted and the lance when drilling the object by using the jetting force of oxygen. It was blown away, melted, and discharged from the perforated area.

As a specific example of the above-mentioned means, for example, there is a method and apparatus for fusing a concrete structure as described in Japanese Patent Application Laid-Open No. 49-71731. In this method, the concrete structure to be melted is preheated with a flame of flammable gas, and then the preheated part is heated with a high temperature mixture of metal powder that has a large oxidation reaction heat and a mixed powder of metal powder that promotes the flow of molten slag. Melt it with a flame jet,
In order to further accelerate the outflow of the molten slag, the jet energy of high-pressure fluid is used to blow it away.
This method employs a method of fusing the concrete structure.

(Problem to be Solved by the Invention) However, with the above-mentioned means, when the drilling progresses to a certain extent and the welded and drilled portion of the workpiece becomes a relatively long blind hole, the workpiece and the lance become stuck. In addition, there was a problem in that the discharge of unnecessary molten material (slag) generated from the slag out of the blind hole was poor, and the lance was worn out quickly due to the heat of the unnecessary molten material itself. In particular, when drilling vertically (or obliquely downward), the inside of the drilled hole will be filled with unnecessary molten material, so the oxygen jetting pressure must be increased to blow away the unnecessary molten material with the oxygen jetting force. There was a problem that had to be improved considerably. However, increasing the pressure of oxygen ejection significantly increased the wear and tear on the lance, making it extremely uneconomical. Moreover, increasing the pressure of oxygen ejection makes it easier for the lance to be extinguished (misfired), and once the lance is extinguished (misfired), work must be temporarily interrupted in order to ignite it again, greatly reducing work efficiency. It had the disadvantage that it deteriorated.

(Means for Solving the Problems) Therefore, the present invention was created in order to solve the above-mentioned difficulties.
In the invention of the drilling method, the tip of the lance 1 is combusted and reacted with oxygen supplied through the interior of the lance 1, and the combustion and reaction heat of the tip of the lance 1 is used to make holes in concrete structures such as concrete structures. The object to be melted H is melted, cut, and perforated. And Lance 1
The water supplied through the interior of the lance 1 is spouted from the water spout 3 at the tip of the lance 1 into the welding and drilling portion of the workpiece H, and the expansion pressure caused by the vaporization of this water is used to melt the workpiece H. A means was adopted for melting the unnecessary molten material generated from the material H and the lance 1 and discharging it from the perforated portion.

In addition, in the invention of a melting and perforating device using an oxygen lance, the tip of the lance 1 is caused to burn and react with oxygen supplied through the inside of the lance 1, and the combustion and reaction heat of the tip of the lance 1 is utilized. In an oxygen lance device for melting, cutting, and drilling a workpiece H such as a concrete structure, a lance 1 is used.
A water flow passage 2 is provided inside the lance 1, and water can be ejected from a water spout 3 provided at the tip of the lance 1 via a water pressurizer 20.

(Function) Oxygen passes through the interior of the lance 1 and is ejected from the tip of the lance 1, causing the tip of the lance 1 to burn and react. Then, the object H to be melted is melted by combustion and reaction heat at the tip of the lance 1, and is then fused and perforated. Water passes through the lance 1 and is appropriately ejected from the water spout 3 at the tip of the lance 1 into the welding and drilling portion of the workpiece H.
Then, the water comes into contact with the melting material at a temperature of 1000°C or higher, the material to be melted in the perforated part H, and the unnecessary melt generated from the lance 1, and is rapidly vaporized and expanded, and this expansion pressure causes the material to be melted to It acts as a force that melts the unnecessary melt generated from H and lance 1 and discharges it from the perforated part. Incidentally, the unnecessary molten material generated from the material to be melted H and the lance 1 is cooled by contact with water, and its viscosity decreases and becomes granular, making it easier to be discharged. Furthermore, the lance 1 is appropriately cooled by water passing through its interior.

In addition, in the case of melting and punching equipment, lance 1
The tip of the lance is combusted and reacted by oxygen supplied through the inside, and this lance 1
The object H to be melted is melted by the combustion and reaction heat of the tip portion, and is then fused and perforated. The lance 1 is provided with a water flow passage 2 inside thereof, and the water is
The water is ejected forward from the water spout 3 provided at the tip of the lance 1 via the water pressurizer 20 .

(Example) Hereinafter, the present invention will be described with reference to the illustrated example. First, the proximal end portion of the lance 1 is mounted on the lance holder 10. Next, oxygen is supplied from the proximal end of the lance 1 through the lance 1 to the distal end of the lance 1 via the lance holder 10 from the oxygen spout 4 provided at the distal end of the lance 1. This is ignited to cause the tip of the lance 1 to burn and react, and the heat of combustion and reaction at the tip of the lance 1 is used to melt the object H, such as a concrete structure. perforate.

When the melting and drilling work of the workpiece H has progressed to a certain extent, the material is supplied from the proximal end of the lance 1 through the inside of the lance 1 to the tip end of the lance 1 via the lance holder 10. Water is appropriately spouted from a water spout 3 provided at the tip of the lance 1 into the welding and drilling portion of the workpiece H. Then 1000
When water comes into contact with the unnecessary molten material in the melting section and the perforated part, which is above ℃, the water rapidly vaporizes and expands, and this expansion pressure is used to remove the unnecessary molten material generated from the workpiece H and the lance 1. The material is melted and discharged from the perforated area to proceed with the perforation work. By the way, water
When melting at a temperature of 1000° C. or higher comes into contact with unnecessary molten material in the perforated portion and rapidly expands, the shock wave also promotes the disintegration of the object H to be melted.

The water spouted from the water spout 3 at the tip of the lance 1 is supplied to the lance 1 by a water pressurizer 20 such as a pump.
In addition, the timing of water ejection, ejection time, ejection amount, ejection pressure, etc. are determined based on the flow and discharge state of unnecessary melt, melting, drilling state of the perforated part, etc. For example, water may be spouted intermittently,
It is possible to freely set the settings as appropriate, such as continuous ejection or a combination of these ejections.

In addition, the melting and drilling device of the present invention burns and reacts the tip of the lance 1 with oxygen supplied through the interior of the lance 1, and uses the combustion and reaction heat of the tip of the lance 1 to create concrete structures. A water flow passage 2 is provided in the lance 1, and water is supplied from a water spout 3 provided at the tip of the lance 1 via a water pressurizer 20. It is constructed so that it can eject.

The lance 1 includes an inner tube 7 made of iron or an iron alloy whose inside becomes a water flow passage 2, an outer tube 6 made of iron or an iron alloy having an inner diameter larger than the outer diameter of the inner tube 7, and an inner tube 7. It consists of a plurality of metal wires 5 such as iron wires installed between the outer circumferential surface and the inner circumferential surface of the outer tube 6, and when the inner tube 7 is inserted into the outer tube 6, the inner tube 7
A plurality of metal wires 5 are arranged between the outer tube 6 and the outer tube 6. The tip of the inner tube 7 becomes the water spout 3, and the space between the metal wires 5 between the outer circumferential surface of the inner tube 7 and the inner circumferential surface of the outer tube 6 becomes an oxygen flow path. This becomes the oxygen outlet 4. Note that the specific configuration of the lance 1 is not limited to the illustrated example.

The lance holder 10 to which the lance 1 is detachably attached has a nozzle 11 that guides water supplied through the water pressurizer 20 into the inner pipe 7 of the lance 1.
With the lance 1 in contact with this nozzle 11, the rubber ring 1 is inserted inside the detachable tube 13.
4, and the outer circumferential surface of the lance 1 is pressed by the rubber ring 14, which bulges toward the cylindrical center, so that the lance 1 can be fixed. In the figure, 12 is a buffer that increases the adhesion between the lance 1 and the nozzle 11 and absorbs the impact on the nozzle 11, 15 is an on-off valve for water supplied from the water pressurizer 20, and 16 is This is an on-off valve for oxygen supplied from the oxygen cylinder 21. The lance holder 10 may be configured to ensure watertightness and airtightness at the connection portion with the lance 1 and to allow the lance 1 to be easily attached and detached.
It can be set freely as appropriate without being limited to the illustrated example.

(Effects of the Invention) Therefore, according to the melting and drilling method of the present invention, the tip portion of the lance 1 is combusted and reacted with oxygen supplied through the interior of the lance 1, and the combustion and reaction heat of the tip portion of the lance 1 is reduced. The material to be melted H, such as a concrete structure, is melted, cut, and perforated using the The unnecessary melt generated from the object H to be melted and the lance 1 is discharged from the melted and perforated part by using the expansion pressure caused by the vaporization of this water. By simply spouting water from the water spout 3 at the tip of the lance 1 through the water spout 3 at the tip of the lance 1, the workpiece H can be melted at a temperature of 1000°C or more, the workpiece H inside the hole, and the lance 1. By bringing water into contact with the unnecessary molten material generated from the lance 1, the water can be rapidly vaporized and expanded, and with this expansion pressure, the obstructive unnecessary molten material generated from the workpiece H and the lance 1 can be melted and removed from the drilling area. This allows for reliable and easy evacuation from inside. Moreover, since the unnecessary molten material is cooled by contact with water, its viscosity decreases and it becomes granular, making it easier to discharge. Furthermore, the water passes through the interior of the lance 1 and cools the lance 1 itself appropriately, and the water also comes into contact with the unnecessary molten material and cools it.
The temperature inside the perforation part can be appropriately lowered, unnecessary wear and tear of the lance 1 itself can be suppressed, and the fusing and perforation work can be carried out efficiently and economically.

In particular, when the hole to be drilled in the workpiece H becomes deep or when the hole is drilled downward (or diagonally downward), it is uneconomical to increase the oxygen jet pressure and waste the lance 1. Even if you don't do anything,
Unnecessary molten material can be reliably discharged, and there is no risk of extinguishing lance 1 (misfire) due to increased oxygen jetting pressure, or of re-ignition due to this extinguishing (misfire), and the risk of re-ignition of lance 1 is eliminated. Melting and drilling efficiency will be greatly improved.

Further, according to the melting and drilling apparatus of the present invention, the tip of the lance 1 is combusted and reacted with oxygen supplied through the interior of the lance 1, and the combustion and reaction heat of the tip of the lance 1 is used to create concrete. In an oxygen lance device for melting, welding, and perforating a workpiece H such as a structure, a water flow passage 2 is provided in the lance 1, and a water spout is provided at the tip of the lance 1 via a water pressurizer 20. Since the structure is configured so that water can be spouted from 3, the oxygen supplied through the inside allows
The tip of the lance 1 is caused to burn and react, and the heat of the combustion and reaction melts the workpiece H, allowing it to be melted and drilled. With an extremely simple configuration, water can be passed through the water flow passage 2 provided inside the lance 1 and jetted forward from the water spout 3 provided at the tip of the lance 1, and the Water can be reliably spouted onto the unnecessary molten material generated from the material H and the lance 1. Moreover, since water can flow through the water passage 2 within the lance 1, the lance 1, which is easily heated, can be reliably cooled, and unnecessary wear and tear of the lance 1 can be prevented.

[Brief explanation of drawings]

The drawings illustrate the invention: FIG. 1 is a schematic view of the device, FIG. 2 is a schematic sectional view of the device, and FIG. 3 is a cross-sectional view of the lance. DESCRIPTION OF SYMBOLS 1...Lance, 2...Water flow path, 3...Water outlet, 4...Oxygen outlet, 5...Metal wire, 6...Outer tube, 7...Inner tube, 10...Lance holder, 11
... Nozzle, 12 ... Buffer, 13 ... Detachable tube,
14...Rubber ring, 15...Open/close valve, 16...
Opening/closing valve, 20... Water pressurizer, 21... Oxygen cylinder, H... Item to be melted.

Claims (1)

[Claims] 1. Oxygen supplied through the lance causes the tip of the lance to combust and react, and the heat of combustion and reaction at the tip of the lance is used to melt the object to be melted, such as a concrete structure. The water supplied through the lance is spouted from the water spout at the tip of the lance into the melting and drilling portion of the material to be melted, and the expansion pressure caused by the vaporization of this water is Use this to melt unnecessary melted material generated from the workpiece and lance.
A method of melting and drilling using an oxygen lance, which is characterized by discharging air from within the drilling area. 2. Oxygen supplied through the lance causes the tip of the lance to combust and react, and the heat of combustion and reaction at the tip of the lance is used to melt objects to be melted, such as concrete structures, for welding and drilling. Melting with an oxygen lance, characterized in that the oxygen lance device is configured such that a water flow passage is provided in the lance, and water can be ejected from a water spout provided at the tip of the lance via a water pressurizer. perforation device.