Plasma cutting machine for earthquake rescue and using method thereof

Abstract

The invention relates to the technical field of plasma cutting equipment, and discloses a plasma cutting machine for earthquake rescue and a using method thereof.The plasma cutting machine comprises a machine body, a spray gun and an auxiliary supporting device, a connecting pipe is installed on the spray gun, the connecting pipe and an output socket of the machine body are detachably installed, and the auxiliary supporting device is used for replacing a human hand to hold the spray gun; the auxiliary supporting device comprises a handheld rod, an extension plate, a mounting assembly, a clamping assembly and a pointing assembly. According to the plasma cutting machine for earthquake rescue, a handheld rod, an extension plate, a mounting assembly and a clamping assembly are arranged, so that an auxiliary supporting device can be clamped and fixed to a to-be-cut construction steel bar, the weight of a spray head and the auxiliary supporting device is borne by the construction steel bar, the spray head is not prone to shaking during cutting, and therefore it is guaranteed that cutting is stable and accurate; and by arranging the pointing assembly, the spray gun can accurately face the to-be-cut position of the construction steel bar and conduct cutting perpendicular to the axial direction of the construction steel bar, and the cutting efficiency is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of plasma cutting equipment, and particularly to a plasma cutting machine for earthquake rescue and its usage method. Background Art

[0002] Earthquake disasters are characterized by strong suddenness and great destructiveness, often resulting in the collapse of building structures and the deformation and jamming of metal components, forming a complex rubble environment. A plasma cutting machine for earthquake rescue is an emergency rescue device that uses the heat of a high-temperature plasma arc to melt metal materials and blows away the molten metal with a high-speed plasma flow, thereby realizing the rapid cutting of metal structures (such as building steel bars, steel structure components, etc.).

[0003] Chinese Patent CN118162730B discloses an inverter air plasma cutting machine. By setting a pull-out cutting table at the bottom of the main machine, a portable plasma cutting machine can also clamp and fix workpieces, thus ensuring smooth and accurate cutting.

[0004] In the prior art, for plasma cutting machines used in earthquake rescue, due to the unpredictable working environment, generally, the method of holding the spray gun by hand is used to cut the metal components of buildings. The cutting table used in the above device designs a method to ensure smooth cutting that can also be achieved by a portable plasma cutting machine. However, this method can only place the workpiece on the equipment for cutting and cannot change the cutting height. During earthquake rescue, when cutting the steel bars of buildings, the position of the steel bars cannot be moved. Summary of the Invention

[0005] (I) Technical Problems to be Solved Aiming at the deficiencies of the prior art, the present invention provides a plasma cutting machine for earthquake rescue and its usage method, which has the function of fixing the nozzle of the plasma cutting machine at one end of the building steel bar to be cut, enabling the nozzle to be fixed to the building steel bar, and solving the problems mentioned in the above background art.

[0006] (II) Technical Solutions To solve the above technical problems, the present invention provides the following technical solutions: A plasma cutting machine for earthquake rescue includes a machine body, a spray gun, and an auxiliary support device. A connecting pipe is installed on the spray gun, and the connecting pipe is detachably installed with the output socket of the machine body. The auxiliary support device is used to replace the hand-held spray gun by a person; The auxiliary support device includes a hand-held rod, an extension plate, a mounting assembly, a clamping assembly, and a pointing assembly. The hand-held rod is rotatably connected to the extension plate. The mounting assembly is installed on the extension plate. The handle of the spray gun is detachably installed on the mounting assembly. The clamping assembly is used to clamp the construction steel bar to be cut. The pointing assembly is used to direct the nozzle of the spray gun towards one side of the construction steel bar clamped by the clamping assembly. The clamping assembly includes an opening and closing plate, an arc-shaped clamping plate, a slider, a rotating plate, and a clamping transmission mechanism. The opening and closing plate is rotatably connected to the extension plate. The arc-shaped clamping plate is fixedly installed on the opening and closing plate. The slider is slidably installed on the extension plate. The two ends of the rotating plate are respectively rotatably connected to the opening and closing plate and the slider. The clamping transmission mechanism includes a clamping adjustment knob. The clamping adjustment knob is rotatably installed on the hand-held rod and is used to control the rotation of the slider.

[0007] Preferably, an angle control mechanism is provided between the hand-held rod and the extension plate. The angle control mechanism includes an incomplete gear, a limit block, and a limit spring. The incomplete gear is fixedly installed on the hand-held rod. The limit block is slidably installed on the extension plate and is adapted to be clamped with the incomplete gear. The two ends of the limit spring are respectively fixedly connected to the limit block and the extension plate.

[0008] Preferably, the clamping transmission mechanism includes a clamping transmission disc, an eccentric rod, a swing rod, and a clamping transmission gear. The clamping transmission disc is rotatably installed on the extension plate. The eccentric rod is fixedly installed at a position deviating from the center of the clamping transmission disc. The two ends of the swing rod are respectively rotatably connected to the eccentric rod and the slider. The clamping transmission gear is rotatably installed on the hand-held rod and is meshed with the clamping transmission disc. The clamping adjustment knob is in transmission connection with the clamping transmission gear. A straight slot is provided on the extension plate, and the slider is slidably connected to the straight slot.

[0009] Preferably, the arc-shaped clamping plates cooperate to form a ring, and threaded rods are connected to the arc-shaped clamping plates. The threaded rods are annularly arranged on the ring, and clamping blocks are fixedly installed at the ends of the threaded rods.

[0010] Preferably, the clamping assembly further includes a return spring, and the two ends of the return spring are respectively hung and installed on the opening and closing plate.

[0011] Preferably, the mounting assembly includes a mounting cylinder, a clamping plate, a positioning spring, and a pull rod. A slot is provided on the mounting cylinder, and a retreat groove is provided at one end of the slot. The handle of the spray gun is adaptively inserted into the slot. The clamping plate is arranged inside the retreat groove. The pull rod is slidably connected to the mounting cylinder and penetrates through the outer wall of the mounting cylinder and extends into the interior of the mounting cylinder and is fixedly connected to the clamping plate. The two ends of the positioning spring are respectively fixedly connected to the clamping plate and the retreat groove. A clamping groove adapted to the clamping plate is provided on the handle of the spray gun.

[0012] Preferably, the pointing component includes a pointing turntable, a pointing rod and a rotating rod. The pointing turntable is rotatably mounted on the extension plate, and the rotation axes of the pointing turntable and the opening and closing plate are on the same axis. The mounting cylinder is fixedly connected to the pointing turntable. The pointing rod is fixedly mounted on the pointing turntable, and a chute is provided on the pointing rod. A connecting rod is slidably mounted in the chute. One end of the rotating rod is rotatably connected to the connecting rod, and the other end of the rotating rod is rotatably connected to the opening and closing plate.

[0013] Preferably, the pointing turntable includes a pointing disk and a limiting disk. The pointing disk is rotatably connected to the extension plate and fixedly connected to the pointing rod. The limiting disk is rotatably connected to the pointing disk and fixedly connected to the mounting cylinder. The pointing component further includes a pointing transmission mechanism. The pointing transmission mechanism includes a pointing transmission disk, a pointing transmission gear and a pointing control knob. The pointing transmission disk is rotatably mounted on the extension plate and is in transmission connection with the limiting disk. The pointing transmission gear is rotatably mounted on the hand-held rod and is meshed with the pointing transmission disk. The pointing control knob is rotatably mounted on the hand-held rod and is in transmission connection with the pointing transmission disk.

[0014] Preferably, a sector-shaped groove is formed inside the pointing disk, and a sector-shaped block is fixedly mounted on the limiting disk. The sector-shaped block is rotationally adapted to the sector-shaped groove.

[0015] The present invention also discloses a using method of the plasma cutting machine for earthquake rescue. The specific steps are as follows: Use a demolition tool to expose the building steel bars to be cut from the concrete structure. Place the machine body stably on the ground near the building to be cut, and assemble the spray gun with the mounting component. Hold the hand-held rod of the auxiliary support device and operate the clamping component to make the arc-shaped clamping plate clamp on the building steel bars to be cut. Then insert and install the connecting pipe into the output socket of the machine body, and start the equipment for cutting. After cutting is completed, first turn off the power of the equipment, and then remove the auxiliary support device from the cut building steel bars.

[0016] (III) Beneficial effects Compared with the prior art, the present invention provides a plasma cutting machine for earthquake rescue and its using method, having the following beneficial effects: 1. The plasma cutting machine for earthquake rescue can clamp and fix the auxiliary support device on the building steel bars to be cut by setting a hand-held rod, an extension plate, a mounting component and a clamping component. The weight of the nozzle and the auxiliary support device is borne by the building steel bars, so that the nozzle is not easy to shake during cutting, thus ensuring the smoothness and accuracy of cutting. By setting a pointing component, the spray gun can accurately face the position to be cut on the building steel bars and cut perpendicular to the axial direction of the building steel bars, ensuring the cutting efficiency.

[0017] 2. The plasma cutting machine for earthquake rescue can enable earthquake rescue personnel to easily clamp the arc-shaped clamping plate onto the building steel bars by setting an opening and closing plate, an arc-shaped clamping plate, a slider, a rotating plate and a clamping transmission mechanism. At the same time, since the hand-held rod and the extension plate are rotatably connected, by setting a clamping transmission disc, an eccentric rod, a swing rod, a clamping transmission gear and a clamping adjustment knob, the rescue personnel holding the hand-held rod can clamp the arc-shaped clamping plate onto the building steel bars in a narrow space with a long distance and difficult access for people, enabling the rescue personnel to find a safe working position within a larger range for cutting the building steel bars.

[0018] 3. The plasma cutting machine for earthquake rescue can directly insert the handle of the spray gun into the slot of the mounting cylinder for positioning by setting a mounting cylinder, a clamping plate, a positioning spring and a pull rod. By setting a pointing rotating seat, a pointing rod and a rotating rod, the orientation of the spray gun installed in the mounting cylinder is directly opposite to the building steel bars clamped by the arc-shaped clamping plate. Since the pointing rotating seat includes a pointing turntable and a limiting turntable, and the pointing transmission mechanism can control the rotation of the limiting turntable, the spray gun can cut perpendicular to the axial direction of the building steel bars, ensuring the cutting efficiency. Brief Description of the Drawings

[0019] Figure 1 One of the three-dimensional structure schematic diagrams of the plasma cutting machine for earthquake rescue of the present invention; Figure 2 Two of the three-dimensional structure schematic diagrams of the plasma cutting machine for earthquake rescue of the present invention; Figure 3 Three of the three-dimensional structure schematic diagrams of the plasma cutting machine for earthquake rescue of the present invention; Figure 4 For the present invention Figure 3 The enlarged schematic diagram of the partial structure at A in [the present invention]; Figure 5 Four of the three-dimensional structure schematic diagrams of the plasma cutting machine for earthquake rescue of the present invention; Figure 6 For the present invention Figure 5 The enlarged schematic diagram of the partial structure at B in [the present invention]; Figure 7 One of the three-dimensional structure exploded schematic diagrams of the plasma cutting machine for earthquake rescue of the present invention; Figure 8 This is the second schematic diagram of the three-dimensional structure decomposition of the plasma cutter for earthquake rescue of the present invention.

[0020] In the figure: 1. Machine body; 2. Spray gun; 21. Card slot; 3. Connecting pipe; 4. Handheld rod; 5. Extension plate; 51. Straight notch; 6. Installation component; 61. Installation cylinder; 62. Clamping plate; 63. Positioning spring; 64. Pull rod; 65. Slot; 66. Retreating groove; 7. Clamping component; 71. Opening and closing plate; 72. Arc-shaped clamping plate; 721. Threaded rod; 722. Clamping block; 73. Slide block; 74. Rotating plate; 75. Clamping transmission mechanism; 751. Clamping transmission disk; 752. Eccentric rod; 753. Swing rod; 754. Clamping transmission gear; 755. Clamping adjustment knob; 76. Reset spring; 8. Pointing component; 81. Pointing rotating seat; 811. Pointing turntable; 812. Limit turntable; 813. Sector groove; 814. Sector block; 82. Pointing rod; 821. Slide groove; 822. Connecting rod; 83. Rotating rod; 84. Pointing transmission mechanism; 841. Pointing transmission disk; 842. Pointing transmission gear; 843. Pointing control knob; 9. Angle control mechanism; 91. Incomplete gear; 92. Limit clamping block; 93. Limit spring. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Embodiment 1

[0023] Please refer to Figure 1 、 Figure 2 and Figure 7 . The present invention provides a plasma cutter for earthquake rescue, including a machine body 1, a spray gun 2 and an auxiliary support device. A connecting pipe 3 is installed on the spray gun 2, and the connecting pipe 3 is detachably installed with the output socket of the machine body 1. The auxiliary support device is used to replace the human hand to hold the spray gun 2; The auxiliary support device includes a hand-held rod 4, an extension plate 5, a mounting assembly 6, a clamping assembly 7, and a pointing assembly 8. The hand-held rod 4 is rotatably connected to the extension plate 5. The mounting assembly 6 is installed on the extension plate 5. The handle of the spray gun 2 is detachably installed on the mounting assembly 6. The clamping assembly 7 is used to clamp the construction steel bars to be cut. The pointing assembly 8 is used to direct the nozzle of the spray gun 2 towards one side of the construction steel bars clamped by the clamping assembly 7; The clamping assembly 7 includes a split plate 71, an arc-shaped clamping plate 72, a slider 73, a rotating plate 74, and a clamping transmission mechanism 75. The split plate 71 is rotatably connected to the extension plate 5. The arc-shaped clamping plate 72 is fixedly installed on the split plate 71. The slider 73 is slidably installed on the extension plate 5. The two ends of the rotating plate 74 are respectively rotatably connected to the split plate 71 and the slider 73. The clamping transmission mechanism 75 includes a clamping adjustment knob 755. The clamping adjustment knob 755 is rotatably installed on the hand-held rod 4 and is used to control the rotation of the slider 73.

[0024] As can be seen from the above, since the hand-held rod 4 is rotatably connected to the extension plate 5, when using this plasma cutting machine, the spray gun 2 can be extended into a space where rescue personnel are difficult to enter. By setting the split plate 71, the arc-shaped clamping plate 72, the slider 73, and the rotating plate 74, since the split plate 71 is rotatably connected to the extension plate 5, when the slider 73 slides on the extension plate 5, the slider 73 pushes the slider 73 to move, causing the split plate 71 to open, so that the arc-shaped clamping plate 72 can clamp the construction steel bars. By setting the clamping transmission mechanism 75 and the clamping adjustment knob 755, rotating the clamping adjustment knob 755 can control the movement of the slider 73, so that when the spray gun 2 is extended into a space where rescue personnel are difficult to enter, the arc-shaped clamping plate 72 can also clamp the construction steel bars.

[0025] When using this device, use a demolition tool to expose the construction steel bars to be cut from the concrete structure; place the machine body 1 stably on the ground near the construction steel bars to be cut, and assemble the spray gun 2 with the mounting assembly 6; hold the hand-held rod 4 of the auxiliary support device and operate the clamping assembly 7 to make the arc-shaped clamping plate 72 clamp the construction steel bars to be cut. Then, insert and install the connecting pipe 3 into the output socket of the machine body 1 and start the equipment for cutting; after cutting is completed, first turn off the power of the equipment, and then remove the auxiliary support device from the cut construction steel bars.

[0026] Embodiment 2

[0027] As Figure 3 and Figure 4As shown, the difference between this embodiment and the above embodiment is that an angle control mechanism 9 is provided between the handheld rod 4 and the extension plate 5. The angle control mechanism 9 includes an incomplete gear 91, a limit block 92, and a limit spring 93. The incomplete gear 91 is fixedly installed on the handheld rod 4, the limit block 92 is slidably installed on the extension plate 5, and the limit block 92 is adaptively clamped with the incomplete gear 91. The two ends of the limit spring 93 are respectively fixedly connected to the limit block 92 and the extension plate 5.

[0028] As can be seen from the above, since the limit block 92 is adaptively clamped with the incomplete gear 91, when the limit block 92 is in close contact with the incomplete gear 91, the handheld rod 4 and the extension plate 5 remain fixed. Since the limit spring 93 of the limit block 92 is installed on the extension plate 5, therefore, when the extension plate 5 needs to be rotated, only by pulling the limit block 92 can the extension plate 5 be rotated.

[0029] Embodiment Three

[0030] As Figure 7 shown, the difference between this embodiment and the above embodiment is that the clamping transmission mechanism 75 includes a clamping transmission disk 751, an eccentric rod 752, a swing rod 753, and a clamping transmission gear 754. The clamping transmission disk 751 is rotatably installed on the extension plate 5. The eccentric rod 752 is fixedly installed at a position deviating from the center of the clamping transmission disk 751. The two ends of the swing rod 753 are respectively rotatably connected to the eccentric rod 752 and the slider 73. The clamping transmission gear 754 is rotatably installed on the handheld rod 4, and the clamping transmission gear 754 is meshed with the clamping transmission disk 751. The clamping adjustment knob 755 is in transmission connection with the clamping transmission gear 754; a straight slot 51 is provided on the extension plate 5, and the slider 73 is slidably connected to the straight slot 51.

[0031] As can be seen from the above, the clamping transmission disk 751, the eccentric rod 752, the swing rod 753, and the slider 73 constitute a mechanism in which the rotation of the clamping transmission disk 751 drives the slider 73 to move back and forth linearly. At the same time, since the clamping transmission gear 754 is meshed with the clamping transmission disk 751, and the clamping adjustment knob 755 is in transmission connection with the clamping transmission gear 754, therefore, rotating the clamping adjustment knob 755 can control the slider 73 to move back and forth linearly, so that the opening and closing plate 71 repeats opening and closing. Therefore, only by rotating the clamping adjustment knob 755 in one direction can the opening and closing of the opening and closing plate 71 be continuously realized. When the extension plate 5 rotates relative to the handheld rod 4, the situation where the clamping transmission gear 754 and the clamping transmission disk 751 rotate relative to each other and cause the opening and closing of the opening and closing plate 71 will not limit the use of the clamping assembly 7.

[0032] The arc-shaped clamping plates 72 cooperate to form a ring, and a threaded rod 721 is threadedly connected to the arc-shaped clamping plates 72. The threaded rods 721 are annularly arranged on the ring, and a clamping block 722 is fixedly installed at the end of the threaded rod 721.

[0033] As can be seen from the above, by setting the threaded rod 721, all the clamping blocks 722 can clamp the construction steel bars, and the auxiliary support device can be stably hung on the construction steel bars without easy shaking and swaying.

[0034] The clamping assembly 7 further includes a return spring 76, and both ends of the return spring 76 are respectively hung and installed with the opening and closing plates 71.

[0035] As can be seen from the above, by setting the return spring 76, the two opening and closing plates 71 are subjected to a force that makes them approach and close to each other. Therefore, when the rescuer loosens the clamping adjustment knob 755, the opening and closing plates 71 automatically clamp, and the arc-shaped clamping plate 72 can automatically clamp the construction steel bars, and the situation where the arc-shaped clamping plate 72 is always loose will not occur.

[0036] Embodiment 4

[0037] As Figure 2 、 Figure 5 、 Figure 6 and Figure 7 As shown in

[0038] As can be seen from the above, since the clamping plate 62 and the clamping groove 21 are adapted, when the spray gun 2 is inserted into the slot 65 of the mounting cylinder 61, the clamping plate 62 squeezes the positioning spring 63 and moves towards the inside of the retreat groove 66. When the insertion of the spray gun 2 is completed, under the action of the positioning spring 63, the clamping plate 62 automatically inserts into the clamping groove 21 to prevent the spray gun 2 from disengaging from the mounting cylinder 61. When it is necessary to remove the spray gun 2, only need to pull the pull rod 64 to make the clamping plate 62 disengage from the clamping groove 21.

[0039] The pointing assembly 8 includes a pointing turntable 81, a pointing rod 82 and a rotating rod 83. The pointing turntable 81 is rotatably installed on the extension plate 5, and the rotation axes of the pointing turntable 81 and the opening and closing plate 71 are on the same axis. The mounting cylinder 61 is fixedly connected to the pointing turntable 81. The pointing rod 82 is fixedly installed on the pointing turntable 81, and a chute 821 is provided on the pointing rod 82. A connecting rod 822 is slidably installed in the chute 821. One end of the rotating rod 83 is rotatably connected to the connecting rod 822, and the other end of the rotating rod 83 is rotatably connected to the opening and closing plate 71.

[0040] As can be seen from the above, since one end of the rotating rod 83 is rotatably connected to the opening and closing plate 71 and the other end is rotatably connected to the connecting rod 822, the connecting rod 822 is always on the symmetry line of the two opening and closing plates 71. Since the connecting rod 822 is slidably mounted on the pointing rod 82 through the sliding groove 821, and the pointing rod 82 is rotatably mounted on the extension plate 5 through the pointing rotating seat 81, and the opening and closing plate 71 and the pointing rotating seat 81 rotate coaxially, the length direction of the pointing rod 82 is collinear with the symmetry line of the two opening and closing plates 71. At the same time, since the mounting cylinder 61 is fixedly connected to the pointing rotating seat 81, the mounting cylinder 61 can be oriented through the pointing rotating seat 81, so that the spray gun 2 faces the building steel bars to be cut.

[0041] Embodiment 5

[0042] As Figure 7 and Figure 8 shown, the difference between this embodiment and the above embodiment is that the pointing rotating seat 81 includes a pointing turntable 811 and a limiting turntable 812. The pointing turntable 811 is rotatably connected to the extension plate 5, and the pointing turntable 811 is fixedly connected to the pointing rod 82. The limiting turntable 812 is rotatably connected to the pointing turntable 811, and the limiting turntable 812 is fixedly connected to the mounting cylinder 61. The pointing assembly 8 further includes a pointing transmission mechanism 84. The pointing transmission mechanism 84 includes a pointing transmission disc 841, a pointing transmission gear 842 and a pointing control knob 843. The pointing transmission disc 841 is rotatably mounted on the extension plate 5, and the pointing transmission disc 841 is in transmission connection with the limiting turntable 812. The pointing transmission gear 842 is rotatably mounted on the handheld rod 4, and the pointing transmission gear 842 is meshed with the pointing transmission disc 841. The pointing control knob 843 is rotatably mounted on the handheld rod 4, and the pointing control knob 843 is in transmission connection with the pointing transmission disc 841.

[0043] As can be seen from the above, on the basis of Embodiment 4, this embodiment enables the spray gun 2 to rotate controllably, which is convenient for the spray gun 2 to cut steel bars with a larger diameter. Since the pointing turntable 811 is fixedly connected to the pointing rod 82, the orientation of the pointing turntable 811 is controlled by the pointing rod 82. Since the limiting turntable 812 is in transmission connection with the pointing transmission disc 841, the pointing transmission disc 841 is meshed with the pointing transmission gear 842, and the pointing control knob 843 is in transmission connection with the pointing transmission disc 841, the limiting turntable 812 can be controlled to rotate through the pointing control knob 843, so as to control the nozzle orientation of the spray gun 2.

[0044] A sector-shaped groove 813 is formed inside the pointing turntable 811, and a sector-shaped block 814 is fixedly mounted on the limiting turntable 812. The sector-shaped block 814 is rotationally adapted to the sector-shaped groove 813.

[0045] As can be seen from the above, due to the design of the sector slots 813 and the sector blocks 814, the limit turntable 812 can only rotate relative to the pointing turntable 811 by a small angle, preventing the spray gun 2 from rotating towards the rear. In cooperation with the design in the fourth embodiment, while the rotation angle of the nozzle of the spray gun 2 is small, it can completely cut large-diameter construction steel bars.

[0046] Embodiment Six

[0047] Please refer to Figure 1 - Figure 8 The present invention also discloses a method for using a plasma cutting machine for earthquake rescue. The specific steps are as follows: Use a demolition tool to expose the construction steel bar to be cut from the concrete structure; Place the machine body 1 stably on the ground near the construction steel bar to be cut, and assemble the spray gun 2 with the installation component 6; Hold the hand-held rod 4 of the auxiliary support device and operate the clamping component 7 so that the arc-shaped clamping plate 72 clamps on the construction steel bar to be cut. Then, insert and install the connecting pipe 3 into the output socket of the machine body 1, and start the device for cutting; After cutting is completed, first turn off the power of the device, and then remove the auxiliary support device from the cut construction steel bar.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plasma cutting machine for earthquake rescue, comprising a machine body, a spray gun and an auxiliary support device, characterized in that: A connecting pipe is installed on the spray gun. The connecting pipe is detachably installed with the output socket of the machine body. The auxiliary support device is used to replace a person's hand to hold the spray gun. The auxiliary support device includes a hand-held rod, an extension plate, a mounting component, a clamping component, and a pointing component. The hand-held rod is rotatably connected to the extension plate. The mounting component is installed on the extension plate. The handle of the spray gun is detachably installed on the mounting component. The clamping component is used to clamp the building steel bars to be cut. The pointing component is used to make the nozzle of the spray gun face one side of the building steel bars clamped by the clamping component. The clamping component includes an opening and closing plate, an arc-shaped clamping plate, a slider, a rotating plate, and a clamping transmission mechanism. The opening and closing plate is rotatably connected to the extension plate. The arc-shaped clamping plate is fixedly installed on the opening and closing plate. The slider is slidably installed on the extension plate. The two ends of the rotating plate are respectively rotatably connected to the opening and closing plate and the slider. The clamping transmission mechanism includes a clamping adjustment knob. The clamping adjustment knob is rotatably installed on the hand-held rod and is used to control the rotation of the slider.

2. The plasma cutting machine for earthquake rescue according to claim 1, characterized in that: An angle control mechanism is arranged between the hand-held rod and the extension plate. The angle control mechanism includes an incomplete gear, a limit block, and a limit spring. The incomplete gear is fixedly installed on the hand-held rod. The limit block is slidably installed on the extension plate, and the limit block is adaptively clamped with the incomplete gear. The two ends of the limit spring are respectively fixedly connected to the limit block and the extension plate.

3. The plasma cutter for earthquake rescue according to claim 1, characterized in that: The clamping transmission mechanism includes a clamping transmission disc, an eccentric rod, a swing rod, and a clamping transmission gear. The clamping transmission disc is rotatably installed on the extension plate. The eccentric rod is fixedly installed at a position deviating from the center of the clamping transmission disc. The two ends of the swing rod are respectively rotatably connected to the eccentric rod and the slider. The clamping transmission gear is rotatably installed on the hand-held rod, and the clamping transmission gear is meshed with the clamping transmission disc. The clamping adjustment knob is in transmission connection with the clamping transmission gear. A straight slot is opened on the extension plate, and the slider is slidably connected with the straight slot.

4. The plasma cutting machine for earthquake rescue according to claim 1, wherein: The arc-shaped clamping plates cooperate to form a ring, and threaded rods are connected to the arc-shaped clamping plates. The threaded rods are annularly arranged on the ring, and clamping blocks are fixedly installed at the ends of the threaded rods.

5. The plasma cutter for earthquake rescue according to claim 1, characterized in that: The clamping component further includes a return spring. The two ends of the return spring are respectively hung and installed on the opening and closing plate.

6. The plasma cutting machine for earthquake rescue according to claim 1, wherein: The mounting component includes a mounting cylinder, a clamping plate, a positioning spring, and a pull rod. A slot is opened on the mounting cylinder. A retreat groove is opened at one end of the slot. The handle of the spray gun is adaptively inserted into the slot. The clamping plate is arranged inside the retreat groove. The pull rod is slidably connected with the mounting cylinder, and the pull rod penetrates through the outer wall of the mounting cylinder and extends into the interior of the mounting cylinder and is fixedly connected to the clamping plate. The two ends of the positioning spring are respectively fixedly connected to the clamping plate and the retreat groove. A clamping groove adapted to the clamping plate is opened on the handle of the spray gun.

7. The plasma cutter for earthquake rescue according to claim 6, wherein: The pointing component includes a pointing turntable, a pointing rod and a rotating rod. The pointing turntable is rotatably installed on the extension plate, and the rotation axes of the pointing turntable and the opening and closing plate are on the same axis. The installation cylinder is fixedly connected to the pointing turntable. The pointing rod is fixedly installed on the pointing turntable, and a chute is provided on the pointing rod. A connecting rod is slidably installed in the chute. One end of the rotating rod is rotatably connected to the connecting rod, and the other end of the rotating rod is rotatably connected to the opening and closing plate.

8. The plasma cutting machine for earthquake rescue according to claim 7, wherein: The pointing turntable includes a pointing disk and a limiting disk. The pointing disk is rotatably connected to the extension plate and fixedly connected to the pointing rod. The limiting disk is rotatably connected to the pointing disk and fixedly connected to the installation cylinder. The pointing component further includes a pointing transmission mechanism. The pointing transmission mechanism includes a pointing transmission disk, a pointing transmission gear and a pointing control knob. The pointing transmission disk is rotatably installed on the extension plate and is in transmission connection with the limiting disk. The pointing transmission gear is rotatably installed on the handheld rod and is meshed with the pointing transmission disk. The pointing control knob is rotatably installed on the handheld rod and is in transmission connection with the pointing transmission disk.

9. The plasma cutting machine for earthquake rescue according to claim 8, wherein: A sector groove is formed inside the pointing disk, and a sector block is fixedly installed on the limiting disk. The sector block is rotationally adapted to the sector groove.

10. A method for using a plasma cutting machine for earthquake rescue, which uses a plasma cutting machine for earthquake rescue as described in any one of claims 1-9, characterized in that, The specific steps are as follows: Use a demolition tool to expose the building steel bars to be cut from the concrete structure. Place the machine body stably on the ground near the building to be cut, and assemble the spray gun with the installation component. Hold the handheld rod of the auxiliary support device and operate the clamping component so that the arc-shaped clamping plate clamps on the building steel bars to be cut. Then insert and install the connecting pipe into the output socket of the machine body, and start the equipment for cutting. After cutting is completed, first turn off the power of the equipment, and then remove the auxiliary support device from the cut building steel bars.

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