JP2020138303A - Cutting device and cutting method of nonmetallic structure - Google Patents

Abstract

To provide a cutting device of a nonmetallic structure capable of cutting mass concrete and an underground outer wall.SOLUTION: A cutting device 11 of a nonmetallic structure has an adjuster 17 for respectively storing combustion gas, oxygen, metal powder and cooling water, and the combustion gas, the oxygen, the metal powder and the cooling water supplied to the flame port 16 side of a cutting via a supply hose to a cutting torch 13 continuously movable to the nonmetallic structure 12, a handling device 14 for continuously moving the cutting torch, the supply hose 15 connected to the cutting torch. The handling device is installed in a movable carriage 23.SELECTED DRAWING: Figure 2

Description

The present invention relates to a cutting device and a cutting method for a non-metal structure such as concrete capable of cutting a mascon or an underground outer wall.

In recent years, there are many opportunities for buildings to be renewed by scrap and build, and for this reason, the generation of noise and vibration associated with the demolition work of existing concrete structures has become a social problem.
The demolition method with the best workability is a method using a giant breaker, but if there is concern about the influence on the surroundings due to large vibration, the existing concrete structure is dismantled using a wire saw or core drill.
However, even in this case, the state of the existing concrete structure is not clear, which causes process delay and cost increase.

On the other hand, as a conventional method for cutting a concrete structure, a method and an apparatus for fusing the concrete structure disclosed in Japanese Patent Application Laid-Open No. 49-71731 are known (see Patent Document 1).

The method for fusing this concrete structure is as follows: (A) First, the concrete structure to be flute is preheated with a flame of a flammable gas to form a preheated portion, and (B) the preheated portion is a metal having a large oxidation reaction heat. In addition to powder, it is melted by a high-temperature flame jet with a mixed powder of metal powder that promotes the flow of molten slag, and (C) it is blown off using the jet energy of a high-pressure fluid to further accelerate the outflow of the molten slag, and concrete. This is a method of fusing a structure.

Further, as shown in FIG. 4, the device 1 for fusing the concrete structure includes three nozzles 2, 3 and 4, and the first nozzle 2 is connected to the metal powder supply device 2a and has a high temperature flame. The jet 2b is formed, the second nozzle 3 is connected to the flammable gas cylinder 3a to form the flame jet 3b, and the third nozzle 4 is connected to the fluid source 4a to blow off the molten concrete structure. ..

In the device 1 for fusing a concrete structure having such a configuration, the nozzles 2, 3 and 4 move together in the direction of arrow X as shown in FIG. (A) Then, the preheating portion 6 is formed on the surface 5a of the concrete structure 5 by the flame jet 3b from the nozzle 3. (B) Next, the high-temperature flame jet 2b from the nozzle 2 hits the preheating portion 6, and the surface 5a of the concrete structure 5 melts to form the melted portion 7. (C) Further, the molten portion 7 is blown off by the air flow 4b from the nozzle 4.
Therefore, the molten portion 7 becomes molten slag 8 and flows out, and does not adhere to and solidify on the concrete structure 5.

Japanese Unexamined Patent Publication No. 49-71731

In this conventional method and device for melting a concrete structure, it is possible to melt a concrete structure having a thickness of several centimeters to several tens of centimeters, but for example, it is possible to melt a mascon having a thickness of 1 meter or more. Can not.
Further, there is a problem in workability in a place where the back side is restricted such as an underground outer wall or a pressure plate, and as a result, there is a problem that a process delay or a cost increase may occur.

Since three nozzles for the flame port are required, there is a problem that not only the workability at the time of fusing work is poor, but also the manufacturing cost of the device is high.

Therefore, in the case of the conventional example, the solution is that the mascon can be cut, the workability can be improved even if the back side of the underground outer wall or the pressure plate is limited, and the workability during the cutting work is improved. I have a problem to do.

The gist of the present invention for solving the above-mentioned problems of the conventional example is a cutting torch that can be continuously moved with respect to a non-metal structure, a handling device for continuously moving the cutting torch, and the cutting. A supply hose connected to the torch, combustion gas, oxygen, metal powder and cooling water supplied to the flame port side of the cutting torch via the supply hose, and the combustion gas, oxygen, metal powder and cooling water are stored, respectively. It is to have at least a regulator to be used.

Further, the cutting torch is provided with a combustion gas supply path, an oxygen supply path and a metal powder supply path communicating with the cylinder portion on the flame port side, and is also provided with a cooling water channel for cooling the cutting torch. Being,;
The handling device is mounted on a movable trolley,;
The combustion gas is a hydrogen-rich gas;
Is included.

The gist of the present invention for solving the above-mentioned problems of the conventional example is a method for cutting a non-metal structure using the cutting device according to claim 1, wherein the cutting torch is opposed to the non-metal structure. The flame port of the cutting torch is continuously moved with respect to the non-metal structure, a dehiscence portion is formed in the non-metal structure by the flame of the flame port, and the flame port is formed with respect to the dehiscence portion. Is continuously moved and gradually inserted to deepen the dehiscence portion and cut the non-metal structure.

According to the non-metal structure cutting device according to the present invention, the flame port of the cutting torch can be continuously moved with respect to the non-metal structure. Then, a dehiscence portion can be formed in the non-metal structure by the flame of the flame port. Further, the flame port can be continuously moved with respect to the dehiscence portion and gradually inserted to deepen the dehiscence portion to cut the non-metal structure.
Therefore, it is possible to cut a large structure such as a mascon, and even if there is a limitation on the back side of the underground outer wall or the pressure plate, it is possible to cut with good workability, which is an excellent effect.

The cutting torch is provided with a combustion gas supply path, an oxygen supply path, and a metal powder supply path communicating with the cylinder on the flame port side, and is provided with a cooling water channel for cooling the cutting torch. , The cutting torch can be cooled during the cutting operation.
Therefore, when the flame port is inserted from the dehiscence portion of the non-metal structure, the cutting work can be performed while preventing the cutting torch from overheating.

Since the handling device is installed on a movable trolley, the cutting device can be freely moved, so that the cutting work can be performed in various places, which is an excellent effect.

Since the combustion gas is a hydrogen-rich gas, radiant heat from the object to be cut can be suppressed during the cutting operation, so that overheating of the cutting torch is suppressed when the flame port is inserted from the dehiscence portion of the non-metal structure. It has an excellent effect of being able to do it.

According to the method for cutting a non-metal structure according to the present invention, the flame port of the cutting torch is continuously moved with respect to the non-metal structure, and a dehiscence portion is formed in the non-metal structure by the flame of the flame port. Further, the flame port is continuously moved with respect to the dehiscence portion, and the flame port is gradually inserted to deepen the dehiscence portion to cut the non-metal structure, so that a large structure such as a mass control can be cut. .. In addition, even when there are restrictions on the back side of the underground outer wall, pressure plate, etc., various excellent effects such as good workability can be obtained.

It is a side view explaining the cutting operation using the cutting apparatus which concerns on this invention. It is a side view explaining the cutting operation using the cutting apparatus which concerns on this invention. It is sectional drawing explaining the structure of the cutting torch. It is sectional drawing which shows schematically the apparatus which melts the concrete structure which concerns on the prior art.

Next, an embodiment of the present invention will be described with reference to the drawings. First, in FIGS. 1 and 2, reference numeral 11 indicates a cutting device for a non-metal structure, and the cutting device 11 includes a cutting torch 13 that can be continuously moved with respect to the non-metal structure 12 and a cutting torch 13. A handling device 14 for continuously moving the two, a supply hose 15 connected to the cutting torch 13, and combustion gas, oxygen, metal powder, and cooling supplied to the flame port 16 side of the cutting torch 13 via the supply hose 15. It is composed of water and a regulator 17 for storing each of these combustion gases, oxygen, metal powder and cooling water.

The non-metal structure 12 to be cut is, for example, a large concrete structure such as a mascon, an underground outer wall, or a pressure plate, but other large or small non-metal structures are included.

As shown in FIG. 3, the cutting torch 13 has a combustion gas supply path 19 communicating with a tubular portion 18 on the flame port 16 side, an oxygen supply path 20, and a metal powder supply path 21.
Further, the cutting torch 13 is provided with a cooling water channel 22 so that the cooling water can be sent from one side 22a of the cooling water channel 22 and the cooling water can be discharged from the other side 22b. Since the cutting torch 13 can be cooled with cooling water in this way, the cutting torch 13 is overheated when the flame port 16 is inserted from the fissure portion 24 of the non-metal structure 12 (see FIGS. 1 and 2). Cutting work can be performed while preventing.

As shown in FIGS. 1 and 2, the handling device 14 is provided with a plurality of arms 25 rotatably provided via a plurality of pins 26, a base 27 is installed on a carriage 23, and a tip portion 28 is provided. Is connected to the cutting torch 13.
An operation arm 29 is provided on the appropriate pin 26, and the cutting torch 13 can be freely moved by the operator 30 operating the operation arm 29. That is, the cutting torch 13 can be continuously moved with respect to the non-metal structure 12.
The continuous movement of the cutting torch 13 increases the cutting width by moving in the vertical direction or the perspective direction with respect to the non-metal structure 12, swinging or swinging with a part of the cutting torch 13 as a fulcrum. Means lateral movement for.
Further, in FIG. 1, reference numeral 31 indicates a workbench on which the worker 30 sits.

Further, the handling device 14 is installed on a movable carriage 23. Therefore, the cutting device 11 can be appropriately moved to perform the cutting operation at various places.

The supply hose 15 is a hose made of rubber or resin for supplying the combustion gas, oxygen, metal powder, and cooling water stored in the regulator 17 to the cutting torch 13, respectively.

The regulator 17 stores the combustion gas, oxygen, metal powder, and cooling water supplied to the flame port 16 side of the cutting torch 13 via the supply hose 15 in the respective storage bodies.

The combustion gas is a mixed gas of a flammable gas and a combustible gas. Further, as the combustion gas, hydrogen gas or various gases can be used, but it is particularly desirable to use hydrogen-rich gas. In this case, since the radiant heat from the object to be cut can be suppressed during the cutting operation, the overheating of the cutting torch 13 can be suppressed when the flame port 16 is inserted from the dehiscence portion 24 of the non-metal structure 12.
The hydrogen-rich gas is a hydrogen gas (100%) or a mixed gas of hydrogen gas and a carbonized gas (hydrogen mixing ratio is 50% or more).

Oxygen is supplied to the cutting torch 13 for burning the combustion gas, for burning the metal powder, and for discharging the non-metal structure powder and the like.
Further, the metal powder is supplied to the cutting torch 13 in order to raise the temperature of the flame. Specifically, as the metal powder, a mixed powder of iron and aluminum is used, but in addition to this, various types of metal powder capable of raising the temperature of the flame may be used.

The cutting device 11 for the non-metal structure configured as described above can continuously move the flame port 16 of the cutting torch 13 with respect to the non-metal structure 12. Then, the dehiscence portion 24 can be formed in the non-metal structure by the flame of the flame port 16. Further, the flame port 16 can be continuously moved with respect to the dehiscence portion 24 and gradually inserted to deepen the dehiscence portion 24 to cut the non-metal structure 12 (FIGS. 1 and 2). reference).
Therefore, a large structure such as a mascon can be easily cut, and even if there are restrictions on the back side of the underground outer wall or the pressure plate, the workability can be improved.
Regarding the continuous movement of the flame port 16 of the cutting torch 13 with respect to the non-metal structure 12, as described above, the flame port 16 is moved in the vertical direction or the perspective direction with respect to the non-metal structure 12. It means moving, swinging or swinging with a part of the cutting torch 13 as a fulcrum, and moving laterally to widen the cutting width.

Next, a method of cutting the non-metal structure using the non-metal structure cutting device 11 will be described. First, the cutting torch 13 is opposed to the non-metal structure 12, the flame port 16 of the cutting torch 13 is continuously moved with respect to the non-metal structure 12, and the non-metal is generated by the flame 16a from the flame port 16. A dehiscence portion 24 is formed in the structure 12. Then, the flame port 16 is continuously moved with respect to the dehiscence portion 24, and the flame port 16 is gradually inserted to deepen the dehiscence portion 24 to cut the non-metal structure 12 (see FIGS. 1 and 2). .. At this time, the cutting temperature of the flame 16a is considered to be 2000 to 2500 ° C. or higher.

In the method for cutting a non-metal structure configured as described above, a dehiscence portion 24 is formed in the non-metal structure 12 by the flame 16a of the flame port 16, and the flame port 16 is continuously provided to the dehiscence portion 24. Since the non-metal structure 12 is cut by gradually inserting and deepening the dehiscence portion 24, it is possible to cut a large structure such as a mass controller. In addition, even if there are restrictions on the back side of the underground outer wall or pressure plate, it is possible to cut with good workability.

1 Device for fusing concrete structures 2 First nozzle 2a Metal powder supply device 2b High temperature flame jet 3 Second nozzle 3a Combustible gas bomb 3b Flame jet 4 Third nozzle 4a Fluid source 4b Air flow 5 Concrete structure 5a Surface 6 Preheated part 7 Melted part 8 Melted slag 11 Non-metal structure cutting device 12 Non-metal structure 13 Cutting torch 14 Handling device 15 Supply hose 16 Flame port 16a Flame 17 Regulator 18 Cylinder 19 Combustion gas supply path 20 Oxygen supply hose 21 Metal powder supply hose 22 Cooling water channel 22a One side 22b The other side 23 trolley 24 Dehiscence 25 Arm 26 Pin 27 Base 28 Tip 29 Operation arm 30 Worker 31 Worktable

Claims (5)

A cutting torch that can move continuously with respect to non-metal structures,
A handling device for continuously moving the cutting torch,
The supply hose connected to the cutting torch and
Combustion gas, oxygen, metal powder and cooling water supplied to the flame port side of the cutting torch via the supply hose,
A device for cutting a non-metal structure, comprising at least a regulator for storing the combustion gas, oxygen, metal powder, and cooling water. The cutting torch is provided with a combustion gas supply path, an oxygen supply path, and a metal powder supply path communicating with the cylinder portion on the flame port side, and is provided with a cooling water channel for cooling the cutting torch. The device for cutting a non-metal structure according to claim 1. The non-metal structure cutting device according to claim 1, wherein the handling device is installed on a movable carriage. The device for cutting a non-metal structure according to claim 1, wherein the combustion gas is a hydrogen-rich gas. A method for cutting a non-metal structure using the cutting device of claim 1.
Opposite the cutting torch to the non-metal structure,
The flame port of the cutting torch is continuously moved with respect to the non-metal structure, and a dehiscence portion is formed in the non-metal structure by the flame of the flame port.
A non-metal structure characterized in that the flame port is continuously moved with respect to the dehiscence portion and is gradually inserted to deepen the dehiscence portion to cut the non-metal structure. Cutting method.

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