Portable cutting device unit and cutting system

Abstract

To provide a cutter unit capable of extending an application range of a cutter.SOLUTION: A portable cutter unit has a size such that the portable cutter unit can be mounted on a truck vehicle 1 and holds at least a powder dispenser 38 for supplying metal powder to a cutting torch 44 for cutting a cut object with a flame, and a blower which collects dust in exhaust air which occurs resulting from cutting of the cutting object 84. The portable cutter unit includes: a gas cutting unit 12 which holds the powder dispenser 38; and a duct collector unit which holds the blower.SELECTED DRAWING: Figure 1

Description

Technical Field

[0005] , , ,

[0001] The present invention relates to a cutting device unit and a cutting system used for cutting, for example, reinforced concrete and other objects to be cut.

Background Art

[0002] In recent years, the need for demolition work to remove existing structures before starting construction of new buildings has been increasing. Among existing structures, in the demolition work of robust structures such as reinforced concrete structures, a method using a large breaker is generally used. However, the construction vibration to the surrounding environment associated with the work has become one of the problems. Furthermore, in the underground part, despite the large cross-sectional area of the foundation structure, the work is carried out in a narrow space, and there are problems such as the adoption of large machinery being restricted. Therefore, the development of a construction method that can solve these problems is demanded.

[0003] Currently, as a method for suppressing vibration generated during the demolition of a concrete structure with a large cross-section, there are cutting methods by wire sawing and core boring. However, the former has a problem that the wire saw must be installed on the outer periphery of the cutting part. The latter has a problem that steel materials such as steel bars and steel frames constituting the structure become an obstacle to core boring. Therefore, the inventors have developed a cutting device and a cutting method using a hydrogen-based mixed gas so as to improve the efficiency of demolition in concrete structures and reduce the influence on the surrounding environment (Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0006] The present invention aims to provide a portable cutting device unit and a cutting system that can expand the range of application of the cutting device. [Means for solving the problem]

[0007] To solve the above problems, the cutting device unit of the present invention 、 Cut Powder supply unit for supplying cutting powder to a cutting torch used to cut objects with a flame. A first suspended unit having and, A dust collection unit that collects dust in the exhaust generated as a result of cutting the object to be cut. A second suspended unit having and, It is small enough to be mounted on a truck and is designed to be easily loaded and unloaded from the truck. . Furthermore, in order to solve the above problems, the cutting system of the present invention has a size that can be mounted on a transport vehicle, and at least, A powder supply unit for supplying cutting powder to a cutting torch used to cut an object with a flame, The portable cutting device unit includes a dust collection unit that collects dust in the exhaust generated during the cutting of the object to be cut, During the cutting process, A duct section for guiding the exhaust is connected to the dust collection section. A temperature detection unit is placed in the exhaust flow path to detect the temperature of the exhaust, The duct section is equipped with an opening / closing section that allows for the introduction of cooling gas, The opening and closing unit is controlled based on the detection result of the temperature detection unit. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a portable cutting device unit and a cutting system that can expand the range of application of the cutting device. [Brief explanation of the drawing]

[0009] [Figure 1] (a) is a diagram showing a portable cutting device unit according to an embodiment of the present invention loaded onto a truck vehicle, and (b) is a diagram showing the unit from above the truck vehicle. [Figure 2] (a) is a diagram showing the portable cutting device unit viewed from the side (the right side of the portable cutting device unit in Figure 1(a)). [Figure 3] (a) is a front view showing the gas cutting unit, (b) is a side view showing (a) from the left side, (c) is a side view showing (a) from the right side, and (d) is a top view showing (a) from above. [Figure 4] (a) is a front view showing the gas cutting unit, (b1) is a side view showing (a) from the left side, (b2) is a side view showing (a) with the blower 66, filter section 68, air tank 72, dust collection section 154 etc. removed, (c) is a side view showing (a) from the right side, and (d) is a top view showing (a) from above. [Figure 5] This is an explanatory diagram showing the collection of dust and exhaust during cutting operations. [Figure 6] This is an explanatory diagram illustrating a schematic example of the cutting process. [Figure 7] This is an explanatory diagram illustrating the configuration of a gas cutting unit. [Figure 8] This is an explanatory diagram illustrating the general configuration of the dust collector unit. [Modes for carrying out the invention]

[0010] Hereinafter, a portable cutting device unit (hereinafter referred to as "cutting device unit") 10 according to an embodiment of the present invention will be described. First, the cutting device unit 10 in a situation where cutting work is not mainly being performed (during non-cutting work) will be described. Thereafter, the equipment used during cutting work will be described. Note that FIGS. 1 to 4 utilize design drawings, and lines that do not actually exist (such as the center lines of each part) are drawn. Also, parts overlap each other, and in some cases, parts that are actually hidden and not visible are drawn with solid lines. Furthermore, in some drawings, a mark G (a mark with a circle painted in sections at 90-degree intervals, with only some marked) indicating the center of gravity position is also drawn.

[0011] <Overview of the cutting device unit 10> FIGS. 1(a) and (b) show the cutting device unit 10 loaded on the loading platform of the truck vehicle 1. The cutting device unit 10 includes a gas cutting unit 12 shown in FIGS. 3(a) to (d) and a dust collector unit 52 shown in FIGS. 4(a) to (e).

[0012] The gas cutting unit 12 and the dust collector unit 52 can be connected to and separated from each other. FIGS. 1(a), (b) and FIG. 2 show a state in which the gas cutting unit 12 and the dust collector unit 52 are connected in a facing state.

[0013] In the present embodiment, the size and weight of the cutting device unit 10 are such that, as shown in FIGS. 1(a) and (b), it can be placed on the loading platform of a 2-ton-sized truck (a 2t truck) vehicle 1 in a situation where cutting work is not being performed (during non-cutting work). The cutting device unit 10 can be transported to various work sites while being loaded on the truck vehicle 1.

[0014] When the cutting device unit 10 is installed at the work site, it is suspended using a crane device (not shown) or the like and lowered from the truck vehicle 1 to the ground. When loading and unloading the cutting device unit 10 onto and from the truck vehicle 1, as shown in FIGS. 1(a) and (b), it is possible to perform the loading and unloading operations while connecting the gas cutting unit 12 and the dust collector unit 52. Also, it is possible to separate the gas cutting unit 12 and the dust collector unit 52 and perform the loading and unloading operations individually.

[0015] Each of the gas cutting unit 12 and the dust collector unit 52 includes frame portions 14 and 54. The frame portions 14 and 54 are formed by assembling steel square pipes in a portal and rectangular parallelepiped shape. The frame portions 14 and 54 are formed to be of approximately the same size as each other.

[0016] The lower ends (legs) of the frame portions 14 and 54 are each mounted on base frames 18 and 58 via base plates 16 and 56. The thickness of the base plates 16 and 56 is about 5 mm. The base frames 18 and 58 are configured by assembling angle materials in a rectangular frame shape.

[0017] When the frame portions 14 and 54 are placed on the ground or the like, as shown in FIGS. 2(c), (d) and FIGS. 3(c), (d), anti-tipping angles 20 and 60 are connected under the base frames 18 and 58. The frame portions 14 and 54 are supported by the anti-tipping angles 20 and 60 so as not to tip over in the short side direction (width direction).

[0018] [[ID=1,6]]

[0019] ​When installed at the work site, the gas cutting unit 12 and the dust collector unit 52 are joined together with their long sides facing each other, as shown in Figure 2. The two units 12 and 52 are joined via joints 22 and 62. The joints 22 and 62 are equipped with connectors (not shown) that allow the two units 12 and 52 to be separated and rejoined. Various common connectors can be used, such as those that connect the joints 22 and 62 using bolts and nuts, or those that use locking fittings to hook and lock them.

[0020] Although not shown in the diagram, when installing the cutting device unit 10 at the work site, the frame sections 14 and 54 may be joined with their short sides facing each other. Alternatively, the frame sections 14 and 54 may be arranged in an L-shape and joined together.

[0021] As shown in Figures 1(a), 2, 3(a)-(c), and 4(a)-(c), multiple lifting fittings 24 and 64 protrude from both frame sections 14 and 54. As mentioned above, the lifting fittings 24 and 64 are used when lifting the cutting device unit 10 with crane equipment (not shown) or the like, or when lowering it to the installation site. It is also possible to separate the gas cutting unit 12 and the dust collector unit 52 and lift them individually. Various common types of lifting fittings such as rings, hooks, eye bolts, and shackles can be used as the lifting fittings 24 and 64.

[0022] <Basic configuration of the gas cutting unit 12> The gas cutting unit 12 is equipped with various devices for gas cutting. As shown in Figures 3(a) to 3(c), the gas cutting unit 12 includes a pipe connection panel 26, a power distribution panel 28, a control unit 30, and a mechanical unit 32, etc. The mechanical unit 32 is a rectangular parallelepiped housing and is located inside the frame unit 14.

[0023] The switchboard section 28, the control unit 30, and the piping connection panel section 26 are located on the outside of the frame section 14 and are adjacent to the mechanical section 32 inside the frame section 14 via the frame section 14. The switchboard section 28, the control unit 30, and the piping connection panel section 26 are stacked from the bottom up and secured to prevent them from collapsing. The switchboard section 28, the control unit 30, and the piping connection panel section 26 are all equipped with housings with opening and closing doors, and the interiors can be concealed by closing the doors.

[0024] During cutting operations, the power distribution panel 28 is connected to an external power source (not shown), and the power distribution panel 28 receives power from the external power source to operate the control unit 30, the piping connection panel 26, and the equipment in the machine unit 32. The control unit 30 controls each part of the gas cutting unit 12. The control unit 30 incorporates a computer device, including a CPU, memory unit, and input / output interface, although this is not shown. The control unit 30 is operated by the operator of the gas cutting unit 12.

[0025] As shown in Figure 3(a), various pipe fittings 34 are attached to the pipe connection panel 26. Various IN (input) hoses (pre-stage hose 112 in Figure 5) and OUT (output) hoses (supply hose 114 in Figure 5) used for cutting operations are connected to the pipe fittings 34. The various hoses 112 and 114 will be described later.

[0026] The machine section 32 is equipped with a hopper 36, a powder dispenser (powder supply tank) 38, an air dryer 40, and the like. The hopper 36 is located above the powder dispenser 38 and supplies metal powder (hereinafter referred to as "powder") to the powder dispenser 38 during cutting operations. The powder dispenser 38 mixes the powder with air (powder air) and discharges the mixture of powder and air (powder mixture). The air dryer 40 dries the air supplied to the powder dispenser 38 via the piping connection panel 26.

[0027] In Figure 1, reference numeral 42 indicates a cutting torch rack (hereinafter referred to as "torch rack"). This torch rack 42 holds the cutting torches 44 used for cutting work. In the example in Figure 1, the torch rack 42 holds three cutting torches 44. When cutting work is performed, the cutting torch 44 to be used is selected and removed from the torch rack 42. Cutting work using the cutting torches 44 will be described later.

[0028] Various common methods such as bolting, clamping, welding, and mounting can be used to hold the various pieces of equipment in the gas cutting unit 12.

[0029] <Basic configuration of dust collector unit 52> The dust collector unit 52 is equipped with devices for collecting dust generated by gas cutting. As shown in Figures 4(a) to (c), the dust collector unit 52 includes a blower 66, a filter unit 68, a compressor 70, an air tank 72, a power distribution panel 74, and a control unit 75, etc.

[0030] The control unit 75 incorporates a computer system, including a CPU, memory unit, and input / output interfaces, although these are not shown in the diagram. The control unit 75 is operated by the operator of the dust collector unit 52. The operator of the dust collector unit 52 may be the same as the operator of the gas cutting unit 12.

[0031] During cutting operations, the duct section 76 is connected to the dust collector unit 52, as schematically shown in Figure 5. The duct section 76 connects the dust collector unit 52 to the chamber section 90. The functions of the duct section 76, the chamber section 90, and the various devices provided in the dust collector unit 52 will be described later.

[0032] Various common methods such as bolting, clamping, welding, and mounting can be used to hold the various pieces of equipment in the dust collector unit 52.

[0033] <Cutting operation using the cutting device unit 10> During cutting operations using the cutting device unit 10, the aforementioned cutting torch 44 is used, as shown in Figures 5 and 6. In the situations shown in Figures 5 and 6, the cutting torch 44 is held by the worker 80.

[0034] <<Cutting with a cutting torch>> The cutting torch 44 cuts the object to be cut 84, such as reinforced concrete or strengthened concrete, by spraying a flame 82. As the cutting torch 44, for example, one similar to the one disclosed in the specification and drawings of Japanese Patent Application No. 2022-016656 by the present applicant can be used. The specification and drawings of Japanese Patent Application No. 2022-016656 by the present applicant disclose a cutting device that supplies powder, fuel gas, preheated oxygen, and cutting oxygen to the cutting torch.

[0035] As shown in Figure 5, the cutting torch 44 is connected to the cutting device unit 10. A cylinder rack 78 is connected to the cutting device unit 10. Although not shown in the figure, the cylinder rack 78 is equipped with cylinders for fuel gas and oxygen. Fuel gas, preheated oxygen, and cutting oxygen are supplied from the various cylinders on the cylinder rack 78 to the cutting torch 44 via the gas cutting unit 12 of the cutting device unit 10 (Figures 3(a) to (c)).

[0036] The powder is supplied to the cutting torch 44 from a powder dispenser 38 installed in the mechanical section 32 of the gas cutting unit 12 (Figures 3(a) to (c)), mixed with powder air.

[0037] In the cutting torch 44, fuel gas, various types of oxygen, and powder are each guided through separate, independent channels from the base end to the tip end of the cutting torch 44. A nozzle holder is attached to the tip of the cutting torch 44 (not shown in the diagram), and a nozzle is screwed into the nozzle holder.

[0038] At the tip of the cutting torch 44, fuel gas, preheated oxygen, cutting oxygen, and powder are injected to form a mixed gas. In this mixed gas, the powder is heated and ignited by an ignition device (not shown), causing a flame 82 to be ejected from the cutting torch 44.

[0039] Figure 6 illustrates how an operator 80 grips and operates a cutting torch 44 to cut an object 84 made of reinforced concrete or the like. A flame 82 is ejected from the cutting torch 44 in a straight line. Figure 6 schematically shows how the flame 82 hits the object 84 and reflects off it.

[0040] The operator 80 positions the tip of the cutting torch 44 opposite the object to be cut 84 and heats the surface of the object to be cut 84. Furthermore, once the preheating stage is complete, cutting oxygen is added to the preheating oxygen, and the flame 82 is maintained (or intensified). Then, as cutting oxygen and powder are supplied, a high-temperature flame 82 is ejected, and the object to be cut 84 is heated.

[0041] After the supply of cutting oxygen, the cutting temperature of the flame 82 rises to over 2000-2500°C due to the action of the mixed powder, exceeding the melting point of the object to be cut 84. The high-temperature flame 82 is then blown onto the object to be cut 84, and the part of the object to be cut 84 that is hit by the flame 82 melts.

[0042] A crack 86 is formed in the object to be cut 84 by the flame 82, in which concrete and internal components (such as reinforcing bars) are partially removed. As the crack 86 is formed, the molten object to be cut (molten material) flows out. For example, the worker 80 gradually inserts the tip of the cutting torch 44 into the crack 86, deepening the crack 86.

[0043] The worker 80 appropriately combines forward, lateral, and vertical movements of the cutting torch 44. The worker 80 then sequentially cuts the object to be cut 84 into, for example, plate-like or rectangular parallelepiped shapes, and proceeds with the demolition of buildings and other structures made of concrete.

[0044] Figure 6 shows a shield metal plate 88. This shield metal plate 88 is formed in a plate shape using a fire-resistant metal material. The shield metal plate 88 can be used by the worker 80 as needed, either alone or in combination with the chamber section 90 (described later), to prevent radiant heat and sparks. The shield metal plate 88 is provided with a rectangular opening 89.

[0045] The shield metal plate 88, although not shown in the diagram, can be used in various ways, such as being held by another worker, placed on a stand, supported by a lifting mechanism for the shield metal plate (such as a crane or winch), or leaned against the object to be cut 84. The worker 80 can insert the tip of the cutting torch 44 into the opening 89 and perform the aforementioned cutting work while preventing radiant heat and sparks.

[0046] If the shape of the opening 89 is rectangular, for example as shown in Figure 6, the cutting torch 44 can be moved linearly in the horizontal or vertical direction using the edge of the opening 89 as a guide.

[0047] Furthermore, cooling water flows through the cutting torch 44 via IN (input) and OUT (output) cooling water supply pipes (not shown), and this cooling water circulates between the inside and outside of the cutting torch 44. This prevents excessive temperature rise of the cutting torch 44 during cutting operations.

[0048] <<Collection of dust, etc.>> The cutting of the object 84 by the cutting torch 44 generates sparks, molten material, dust, and exhaust. The generated dust and exhaust are guided to the dust collector unit 52 of the cutting device unit 10 (Figures 4(a) to (c)) via the chamber section 90 and the duct section 76, as shown by arrow A in Figure 5.

[0049] One end of the duct section 76 is connected to the chamber section 90, and the other end is connected to a blower 66 (Figure 4(a)) provided in the dust collector unit 52 of the cutting device unit 10. The blower 66 is, for example, a type (a sirocco fan in this case) that has a rotating blade (not shown) inside and causes the exhaust air sucked in from the center to flow in the circumferential direction (rotational direction, tangential direction). The blower 66 then gives fluidity to the exhaust air containing dust, and the dust-containing exhaust air flows toward the dust collector unit 52 installed to the side. As will be described in detail later, the dust in the exhaust air is collected in the dust collector unit 52, the exhaust air is purified, and then released into the outside air.

[0050] <<Chamber section 90>> As shown in Figures 5 and 6, the chamber section 90 is formed in the shape of a rectangular parallelepiped with one side open. The chamber section 90 is positioned with the open side facing the front of the object to be cut 84, and as shown in Figure 6, it partially covers the object to be cut 84. The chamber section 90 is used to protect the worker 80 from radiant heat and sparks during the cutting operation.

[0051] A slit-shaped work-side opening 92 is formed on the side of the chamber section 90 facing the worker 80. The worker 80 inserts the cutting torch 44 into the work-side opening 92. In the examples of Figures 5 and 6, the orientation of the chamber section 90 is such that the work-side opening 92 extends vertically (up and down with the ground facing downwards).

[0052] The chamber section 90 can be supported and raised / lowered by a lifting mechanism for the chamber section (such as a crane, winch, or pulley, not shown). In the example in Figure 6, a wire 94 extending from the lifting mechanism and connected to the chamber section 90 is schematically shown. In this way, the height of the working-side opening 92 can be changed, and the range of motion of the cutting torch 44 can be changed.

[0053] Furthermore, by making the lifting mechanism movable, for example, in orthogonal directions (two horizontal axis directions), the chamber section 90 can be moved to any position in three dimensions.

[0054] A strip-shaped protective sheet 96 is attached to both edges of the working-side opening 92 of the chamber section 90. The protective sheet 96 is made of a nonwoven fabric (such as felt) that is flexible, heat-insulating, and non-flammable. The protective sheet 96 elastically deforms to sandwich the cutting torch 44 and closes the working-side opening 92, thereby more reliably preventing sparks, molten materials, and exhaust from coming into contact with the worker.

[0055] Thus, the functions of the chamber section 90 include: (1) preventing gaps from forming that could allow exhaust to leak (controlling the opening area) and efficiently recovering exhaust; (2) protecting the worker 80 from flames (sparks, molten material, etc.); (3) preventing the scattering of dust generated by cutting; (4) protecting the worker from fragments during cutting; and (5) protecting the worker from radiant heat during cutting.

[0056] <<Duct section 76>> A flexible pipe is used for the duct section 76. In Figure 5, the duct section 76 is shown to be positioned above the worker 80, but it is also possible to install the duct section 76 in a meandering manner on the ground.

[0057] High-temperature exhaust gas flows through the duct section 76. Therefore, the longer the duct section 76, the longer the distance to the blower 66 of the dust collector unit 52, and the more the exhaust gas cools.

[0058] Flexible tubing is used in the duct section 76 because the installation location of the cutting device unit 10 is not fixed. In other words, the amount of space that can be secured around the cutting device unit 10 depends on the work site. Therefore, by using flexible tubing in the duct section 76, the duct section 76 can be installed while securing the necessary length at various work sites.

[0059] The duct section 76 is covered with an insulating material (insulating sheet, not shown) to minimize any exposed areas. The temperature of the duct section 76 rises as high-temperature exhaust gas flows through it, and the outer periphery of the duct section 76 reaches a high temperature of, for example, 50°C or higher. Therefore, by covering the duct section 76 with insulating material, it is possible to prevent workers around the duct section 76 from directly coming into contact with the high-temperature duct section 76. Note that the insulating material may be omitted in the part of the duct section 76 that is close to the chamber section 90 (for example, within a few meters).

[0060] Figure 8 schematically shows the configuration of the duct section 76 and the main equipment installed in the dust collector unit 52. Outside air is introduced from two locations in the duct section 76, in front of the dust collector unit 52 (more specifically, in front of the blower 66). The parts indicated by reference numerals 102 and 104 in Figure 8 are the outside air introduction points. By taking in outside air, it is possible to further lower the temperature of the exhaust gas flowing into the dust collector unit 52.

[0061] In the example shown in Figure 8, a valve device 106 is provided at the outside air inlet 102, which is close to the dust collector unit 52. By opening the valve device 106, the introduction of outside air from the outside air inlet 102 to the duct section 76 can be controlled.

[0062] More specifically, during the cutting operation, the temperature of the exhaust gas inside the duct section 76 (exhaust temperature) is measured by the temperature sensor 108. When the control unit 75 determines that the exhaust temperature exceeds a predetermined threshold, it activates the valve device 106 to allow outside air to be introduced. The duct section 76 is under negative pressure due to the blower 66 (a sirocco fan in this embodiment). Even when the valve device 106 is open, the negative pressure is maintained by the blower 66, allowing outside air to flow in.

[0063] <Roles of each part in the gas cutting unit 12> <<Pipe connection panel section 26>> Various pipe fittings 34 (Figure 3(a), etc.) are attached to the pipe connection panel 26 of the gas cutting unit 12. During cutting operations, the upstream hose 112 and the supply hose 114 are connected to these pipe fittings 34, as schematically shown in Figure 5.

[0064] The front hose 112 is mainly a hose extending from the cylinder rack 78 to the piping connection panel 26, and the supply hose 114 is a hose extending from the piping connection panel 26 to the cutting torch 44. Multiple front hoses 112 and supply hoses 114 are used depending on the type and application of the gas (fuel gas, various types of oxygen). Each front hose 112 and each supply hose 114 is made of a material such as rubber and is flexible.

[0065] The pipe fittings 34 include an IN (input) pipe fitting and an OUT (output) pipe fitting. The upstream hose 112 is connected to the IN (input) pipe fitting, and the supply hose 114 is connected to the OUT (output) pipe fitting.

[0066] The piping connection panel 26 is equipped with various adjustment valves and measuring instruments (not shown). The flow rates of various gases from the cylinder rack 78 are regulated by the various adjustment valves (not shown), and the various gases are supplied to the cutting torch 44.

[0067] Numerous hoses (pre-stage hoses 112 and supply hoses 114) are connected to the piping connection panel 26. Therefore, to prevent incorrect connections of the various hoses 112 and 114, the hoses 112 and 114 are of different sizes and colors according to their intended use.

[0068] The preceding hose 112 is an IN (input) hose for various gases. The supply hose 114 is an OUT (output) hose for various gases. For example, the hydrogen IN (preceding hose 112 for fuel gas input) and hydrogen OUT (supply hose 114 for fuel gas output) are orange, the cutting oxygen OUT and preheating oxygen OUT are light blue, and the powder air IN (air IN for mixture generation) and powder air OUT (air OUT for mixture generation) are black.

[0069] For the input of cutting oxygen and preheating oxygen, a single oxygen IN (input) hose is used, and this oxygen IN (input) hose is a dark blue hose. The oxygen input from the oxygen IN (input) position is distributed to the cutting oxygen OUT (output) and preheating oxygen OUT (output) at the piping connection panel 26.

[0070] In this way, by differentiating the connection points and colors of hoses 112 and 114 according to their intended use, incorrect connections can be prevented, and fail-safe measures can be implemented.

[0071] Furthermore, the diameters of hoses 112 and 114 differ depending on their application. Fail-safe measures are also in place to accommodate the difference in diameter between hoses 112 and 114. In line with the difference in diameter between hoses 112 and 114, the corresponding pipe fittings also differ in size.

[0072] Regarding the color and thickness of hoses 112 and 114, for example, for the same type of gas, the colors may be the same, but the IN (input) upstream hose 112 may be thicker than the OUT (output) supply hose 114. It is also possible to make the IN (input) upstream hose 112 and the OUT (output) supply hose 114 the same thickness for some gases.

[0073] Furthermore, in the piping connection panel 26, the connection positions of the upstream hose 112 and the supply hose 114 are determined according to the specific gravity of the gases. Specifically, from top to bottom, the connection positions are arranged in the following order: hydrogen IN (input), hydrogen OUT (output), oxygen IN (input), cutting oxygen OUT (output), preheating oxygen OUT (output), powder air IN (input), and powder air OUT (output).

[0074] <<Machine Section 32>> Figures 2(a) to 2(d) show the gas cutting unit 12 during non-cutting operations. During cutting operations, air (air for generating a mixed gas (powder air)) is supplied to the powder dispenser 38 via the piping connection panel 26, as schematically shown in Figure 7.

[0075] During cutting operations, a valve device 126 is provided at the bottom of the powder dispenser 38. When the valve device 126 is opened, a mixture of powder and air is discharged from the powder dispenser 38 towards the cutting torch 44.

[0076] The mechanical unit 32 houses a compressor 128 for supplying air used to generate a fuel mixture. As shown in Figure 4(a), the compressor 128 is mounted on a shelf-shaped internal frame 130 within the mechanical unit. The compressor 128 can be mounted on the internal frame 130 using vibration-damping material (e.g., vibration-damping rubber). The legs of the internal frame 130 can also be fixed to a base plate 16 or base frame 18, for example, with vibration-damping material in between. By doing so, vibrations generated during the operation of the compressor 128 are insulated by the vibration-damping material, reducing the transmission of vibrations to the surrounding environment.

[0077] An air dryer 40 is positioned between the compressor 128 and the piping connection panel 26. As mentioned above, the air used to generate the mixture (powder air) is dry air from the air dryer 40.

[0078] <<Other functions of the gas cutting unit 12>> Furthermore, as shown in Figure 7, the gas cutting unit 12 is equipped with a wireless communication device 132 and a remote controller (hereinafter referred to as "remote control") 134 for remote operation. This wireless communication device 132 and remote control 134 allow the control unit 30 to be operated from a remote location (for example, several tens of meters away). By operating the remote control 134, instructions (commands) are input to the control unit 30. Various common wireless communication standards such as Wi-Fi and Bluetooth (registered trademark) can be used as communication standards.

[0079] The operator then uses the remote control 134 to input instructions such as supplying or stopping individual gases, supplying or stopping the entire gas supply, and emergency shutoff of the gas supply (individually and entirely) from a location away from the gas cutting unit 12. When these operations are performed, the control unit 30 receives signals from the wireless communication device 132 and controls various valves in the piping connection panel 26 according to the received information.

[0080] The gas cutting unit 12 is also equipped with a gas leak detector 136 and an alarm light (such as a tricolor light) 138. The control unit 30 of the gas cutting unit 12 determines that a gas leak has occurred when the detected gas value exceeds a threshold and performs information processing to issue an alert. When an alert is issued, the alarm light 138 lights up or flashes in a predetermined color.

[0081] Furthermore, the gas cutting unit 12 has a function for measuring the amount of powder used. The control unit 30 of the gas cutting unit 12 constantly measures the amount of powder used and monitors the amount of powder used in real time. The amount of powder used can be measured, for example, by installing a powder weight sensor (not shown) in the hopper 36 and / or powder dispenser 38 and monitoring the rate at which the powder weight decreases.

[0082] <Roles of each part in the dust collector unit 52> <<Blower 66>> As schematically shown in Figure 8, the blower 66 of the dust collector unit 52 is connected to the filter unit 68. The blower 66 performs intake and exhaust, drawing in dust and exhaust air through the duct unit 76 and sending it to the filter unit 68.

[0083] <<Air Tank 72>> The air tank 72 stores the compressed air supplied from the compressor 70. The compressed air from the air tank 72 is supplied in pulses and blown onto the filter unit 68.

[0084] <<Filter section 68>> In the filter section 68, dust in the exhaust is collected. Dust collection in the filter section 68 is performed by blowing compressed air in a pulsed manner onto the filter (not shown) to create an impact and cause dust (adhered matter) to fall off the filter. The compressed air is blown at predetermined time intervals (for example, every few minutes). In this way, the exhaust is filtered and purified in the filter section 68 before being released into the outside air.

[0085] The filter section 68 is provided with a dust collection section 154. The dust collection section 154 has the function of collecting dust that is blown away and falls by compressed air. The dust collection section 154 is provided in a pull-out manner on the filter section 68 and can be attached to and detached from the filter section 68. For example, an operator near the cutting device unit 10 can easily dispose of the dust accumulated in the dust collection section 154 by manually removing it from the filter section 68.

[0086] An expansion section 156, formed in a bag shape from a flexible material, is connected to the lower part of the filter section 68. The expansion section 156 functions as an auxiliary dust collection section. The total amount of dust that can be collected is determined by the size of the dust collection section 154 and the expansion section.

[0087] <Other functions of the dust collector unit 52> As mentioned above, in the dust collector unit 52, when the exhaust temperature exceeds a threshold during cutting, the valve device 106 is activated and outside air is introduced. At that time, an alert is issued. For example, the alarm light (three-color light, etc.) 138 shown in Figure 7 can be used to issue the alert.

[0088] Furthermore, the dust collector unit 52 is equipped with a remote control function that allows the airflow to be controlled remotely, even from a distance. The airflow is changed by controlling the rotation speed of the rotor blades. As shown in Figure 8, the dust collector unit 52 is equipped with a wireless communication device 158 for remote control. This wireless communication device 158 can communicate wirelessly with the remote control 134. The remote control 134 is the same as the one shown in Figure 7, and by switching channels, it can also communicate with the wireless communication device 158.

[0089] The remote control 134 can operate the control unit 75 of the dust collector unit 52. By operating the remote control 134, instructions (commands) are input to the control unit 75. Various common wireless communication standards such as Wi-Fi and Bluetooth (registered trademark) can be used as the communication standard.

[0090] Furthermore, the combination of the blower 66 and the filter unit 68 can also be referred to as a dust collector. Additionally, the blower 66 and the filter unit 68, along with the dust containment unit 154, can also be referred to as a dust collector.

[0091] Furthermore, in this embodiment, the dust collector unit 52 can be remotely controlled by wireless communication using the wireless communication device 158, but the invention is not limited to this. For example, the dust collector unit 52 may be controlled using wired communication equipment such as a wired remote control (including a wired control panel, etc.). Also, the dust collector unit 52 may be selectively controlled by either wireless or wired means depending on the situation. Moreover, it is possible to control the dust collector unit 52 by wire and issue alerts wirelessly.

[0092] <Main advantages of the cutting device unit 10 according to this embodiment> As described above, the cutting device unit 10 can be transported by truck vehicle 1, making it easy to transport to various locations.

[0093] Furthermore, the cutting device unit 10 integrates all the necessary equipment into the gas cutting unit 12 and the dust collector unit 52. Therefore, the necessary equipment can be compactly arranged. This also makes it possible to easily transport the cutting device unit 10 by truck vehicle 1. Moreover, using the cutting device unit 10, it is possible to easily construct a cutting system with minimal impact on the surrounding environment at various work sites.

[0094] <Inventions that can be extracted from the embodiments> The following inventions can be extracted from the embodiments. (1) Having a size that can be loaded onto a transport vehicle (such as truck vehicle 1), and having at least, A powder supply unit (powder dispenser 38, etc.) for supplying cutting powder (metal powder, etc.) to a cutting torch (cutting torch 44, etc.) for cutting an object to be cut (object to be cut 84, etc.) with a flame (flame 82, etc.), A portable cutting device unit that holds a dust collection unit (such as a blower 66) for collecting dust in the exhaust generated as a result of cutting the object to be cut. (2) A first unit having the powder supply unit (such as a gas cutting unit 12), A portable cutting device unit according to (1) above, comprising a second unit (such as a dust collector unit 52) ​​having the dust collection section. (3) The portable cutting device unit according to (2) above, wherein the first unit and the second unit are able to be connected and separated via joints (joints 22, 62, etc.). (4) The first unit, A control unit (such as a control unit 30) capable of controlling the supply of the cutting powder, The system is equipped with communication equipment (such as wireless communication equipment 132 and wired communication equipment) capable of communicating with the control unit, During the cutting process, A portable cutting device unit according to either (2) or (3) above, which is capable of inputting instructions for supplying and stopping the supply of the cutting powder to the control unit via the wireless communication device. (5) During cutting, A duct section (such as duct section 76) for guiding the exhaust is connected to the dust collection section. A temperature detection unit (such as a temperature sensor 108) is placed in the exhaust flow path (such as in the duct section 76 or at the inlet of the blower 66) to detect the temperature of the exhaust, The duct section is equipped with an opening / closing mechanism (such as a valve device 106) that allows for the introduction of cooling gas, The second unit, A portable cutting device unit according to claim 2 or 3, further comprising a control unit (such as a control unit 75) capable of controlling the opening and closing unit based on the detection result of the temperature detection unit. (6) Having a size that can be loaded onto a transport vehicle (such as truck vehicle 1), and having at least, A powder supply unit (powder dispenser 38, etc.) for supplying cutting powder (metal powder, etc.) to a cutting torch (cutting torch 44, etc.) for cutting an object to be cut (object to be cut 84, etc.) with a flame (flame 82, etc.), The system includes a dust collection unit (such as a blower 66) for collecting dust in the exhaust generated during the cutting of the object to be cut, and a portable cutting device unit (such as a cutting device unit 10) that holds the dust collection unit (such as a blower 66). During the cutting process, A duct section (such as duct section 76) for guiding the exhaust is connected to the dust collection section. A temperature detection unit (such as a temperature sensor 108) is placed in the exhaust flow path to detect the temperature of the exhaust, The duct section is equipped with an opening / closing mechanism (such as a valve device 106) that allows for the introduction of cooling gas, A cutting system in which the opening and closing unit is controlled based on the detection result of the temperature detection unit.

[0095] <Other> Although one embodiment of the present invention has been described above, the present invention is not limited to these embodiments, and many modifications are possible within the scope of the technical idea of ​​the present invention. Furthermore, the embodiments described are merely examples of how the present invention can be implemented, and the technical scope of the present invention should not be interpreted as being limited by these embodiments.

[0096] The cutting torch 44 is designed to be held by the operator 80, but support for the cutting torch 44 is not necessarily limited to direct holding by the operator 80. For example, a gripping device (not shown) for the cutting torch 44 can be provided, and the cutting torch 44 can be supported by this gripping device. Examples of gripping devices include relatively lightweight, simple types (holder type, stand type, handle type, etc.) or heavy equipment attachments that can be mounted on heavy machinery.

[0097] Furthermore, various materials other than reinforced concrete can be used as the object to be cut 84. For example, objects made of acrylic resin glass, steel plates, and soil column walls (made by embedding H-shaped steel as a core material in a cement-mixed soil) can also be used as objects to be cut. Additionally, objects from construction sites, demolition sites, and structures other than those containing steel can also be used as objects to be cut. [Explanation of symbols]

[0098] 1: Truck vehicle 10: Portable cutting device unit 12: Gas cutting unit 14: Frame section 16: Base plate 18: Base frame 20: Anti-tip angle 22: Joint part 24: Hanging hardware 26: Piping connection panel 28: Switchboard section 30: Control Unit 32: Machinery Department 34: Pipe fittings 36: Hoppa 38: Powder dispenser 40: Air dryer 42: Torch rack 44: Cutting Torch 52: Dust collector unit 54: Frame section 56: Base plate 58: Base mount 60: Anti-tip angle 62: Joint part 64: Hanging hardware 66: Blower 68: Filter section 70: Compressor 72: Air Tank 74:Switchboard section 75: Control Unit 76: Duct section 78: Cylinder rack 80: Worker 82: Flame 84: Object to be cut 86 :Cleft part 88: Shield metal plate 89: Opening 90: Chamber Department 92: Work side opening 94: Wire 96: Protective sheet 102, 104: Outside air intake section 106: Valve device 108: Temperature sensor 112: Front hose 114: Supply hose 126: Valve device 128: Compressor 130: Internal frame of the machine section 132: Wireless communication equipment 134: Remote control 136: Detector 138:Warning light 154: Dust containment section 156: Expansion section

Claims

1. A suspended first unit having a powder supply unit for supplying cutting powder to a cutting torch for cutting an object with a flame, A second suspended unit having a dust collection section for collecting dust in the exhaust generated as a result of cutting the object to be cut, A portable cutting device unit having a size that allows it to be mounted on a truck vehicle and that can be easily loaded and unloaded from the truck vehicle.

2. The portable cutting device unit according to claim 1, wherein the first unit and the second unit are connectable and detachable via a joint.

3. In the first unit, A control unit capable of controlling the supply of the cutting powder, A communication device capable of communicating with the control unit is provided, During the cutting process, The portable cutting device unit according to claim 1 or 2, wherein the control unit can receive instructions for supplying and stopping the supply of the cutting powder via the communication device.

4. During the cutting process, A duct section for guiding the exhaust is connected to the dust collection section. A temperature detection unit is placed in the exhaust flow path to detect the temperature of the exhaust, The duct section is equipped with an opening / closing section that allows for the introduction of cooling gas, The second unit, A portable cutting device unit according to claim 1 or 2, further comprising a control unit capable of controlling the opening and closing unit based on the detection result of the temperature detection unit.

5. It is small enough to be mounted on a transport vehicle, and at least, A powder supply unit for supplying cutting powder to a cutting torch used to cut an object with a flame, The portable cutting device unit includes a dust collection unit that collects dust in the exhaust generated during the cutting of the object to be cut, During the cutting process, A duct section for guiding the exhaust is connected to the dust collection section. A temperature detection unit is placed in the exhaust flow path to detect the temperature of the exhaust, The duct section is equipped with an opening / closing section that allows for the introduction of cooling gas, A cutting system in which the opening and closing unit is controlled based on the detection result of the temperature detection unit.

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