Plasma cutting machine for earthquake rescue and use method thereof

Abstract

The present invention relates to the technical field of plasma cutting equipment, and discloses a plasma cutting machine for earthquake rescue and a method of using the same, comprising a machine body, a spray gun and an auxiliary support device, wherein a connecting pipe is installed on the spray gun, and the connecting pipe and the output socket of the machine body are detachably installed, and the auxiliary support device is used to replace the human hand holding the spray gun; the auxiliary support device comprises a hand-held rod, an extension plate, a mounting assembly, a clamping assembly and a pointing assembly; the plasma cutting machine for earthquake rescue, by arranging the hand-held rod, the extension plate, the mounting assembly and the clamping assembly, enables the auxiliary support device to be clamped and fixed on the building steel bars to be cut, so that the weight of the nozzle and the auxiliary support device is borne by the building steel bars, and the nozzle is not easy to shake during cutting, thereby ensuring smooth and accurate cutting, and by arranging the pointing assembly, the spray gun can accurately point to the position to be cut of the building steel bars and cut perpendicularly to the axial direction of the building steel bars, thereby ensuring cutting efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of plasma cutting equipment, and in particular to a plasma cutting machine for earthquake rescue and a method of using the same. Background Art

[0002] Earthquake disasters are characterized by sudden and destructive nature, often leading to the collapse of building structures, the deformation and seizure of metal components, and the creation of complex ruins. Earthquake rescue plasma cutters are emergency rescue equipment that utilize the heat of a high-temperature plasma arc to melt metal materials and then use a high-speed plasma jet to remove the molten metal, enabling rapid cutting of metal structures (such as rebar and steel components).

[0003] Chinese patent CN118162730B discloses an inverter air plasma cutting machine. By providing a retractable cutting table at the bottom of the main machine, the portable plasma cutting machine can also clamp and fix the workpiece, thereby ensuring smooth and accurate cutting.

[0004] Plasma cutters used for earthquake rescue in the prior art generally use handheld spray guns to cut metal components of buildings due to unpredictable working environments. The cutting table used in the above-mentioned device is designed with a method to ensure smooth cutting that can also be achieved by portable plasma cutters. However, this method can only place the workpiece on the equipment for cutting, and the cutting height cannot be changed. During earthquake rescue, when cutting the steel bars of a building, the position of the steel bars cannot be moved. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In response to the shortcomings of the existing technology, the present invention provides a plasma cutting machine for earthquake rescue and a method of using the same, which has the function of fixing the nozzle of the plasma cutting machine to one end of the building steel bar to be cut, so that the nozzle can be fixed to the building steel bar, solving the problems mentioned in the above background technology.

[0007] (2) Technical solution

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] A plasma cutting machine for earthquake rescue, comprising a machine body, a spray gun, and an auxiliary support device. The spray gun is mounted with a connecting pipe, which is detachably mounted to an output socket of the machine body. The auxiliary support device is used to replace a human hand to hold the spray gun.

[0010] 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 and the extension plate are rotatably connected. The mounting assembly is mounted on the extension plate. The handle of the spray gun is detachably mounted on the mounting assembly. The clamping assembly is used to clamp the building steel bar to be cut. The pointing assembly is used to direct the nozzle of the spray gun toward one side of the building steel bar clamped by the clamping assembly.

[0011] 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 mounted on the opening and closing plate, the slider is slidably mounted on the extension plate, and 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, which is rotatably mounted on the hand-held rod for controlling the rotation of the slider.

[0012] Preferably, an angle control mechanism is provided between the hand-held rod and the extension plate, and the angle control mechanism includes an incomplete gear, a limit block and a limit spring. The incomplete gear is fixedly mounted on the hand-held rod, and the limit block is slidably mounted on the extension plate, and the limit block is adapted to be engaged with the incomplete gear, and the two ends of the limit spring are fixedly connected to the limit block and the extension plate respectively.

[0013] Preferably, the clamping transmission mechanism includes a clamping transmission disk, an eccentric rod, a swing rod and a clamping transmission gear. The clamping transmission disk is rotatably mounted on the extension plate, the eccentric rod is fixedly mounted on the clamping transmission disk at a position deviated from the center of the circle, the two ends of the swing rod are rotatably connected to the eccentric rod and the slider respectively, the clamping transmission gear is rotatably mounted on the hand-held rod, and the clamping transmission gear is meshed with the clamping transmission disk, and the clamping adjustment knob is transmission-connected to the clamping transmission gear; a straight slot is provided on the extension plate, and the slider is slidably connected to the straight slot.

[0014] Preferably, the arc-shaped clamping plates cooperate to form a circular ring, and threaded rods are threadedly connected to the arc-shaped clamping plates. The threaded rods are distributed in a circular array on the circular ring, and clamping blocks are fixedly installed at the ends of the threaded rods.

[0015] Preferably, the clamping assembly further includes a return spring, and both ends of the return spring are respectively mounted on the opening and closing plates.

[0016] Preferably, the mounting assembly includes a mounting tube, a card plate, a positioning spring and a pull rod. A slot is provided on the mounting tube, and a retreat groove is provided at one end of the slot. The handle of the spray gun is adapted to be plugged into the slot, and the card plate is arranged inside the retreat groove. The pull rod is slidingly connected to the mounting tube, and the pull rod passes through the outer wall of the mounting tube and extends to the interior of the mounting tube and is fixedly connected to the card plate. The two ends of the positioning spring are respectively fixedly connected to the card plate and the retreat groove. A card slot adapted to the card plate is provided on the handle of the spray gun.

[0017] Preferably, the pointing assembly includes a pointing swivel seat, a pointing rod and a rotating rod. The pointing swivel seat is rotatably mounted on the extension plate, and the rotation axis of the pointing swivel seat and the opening and closing plate are on the same axis. The mounting tube is fixedly connected to the pointing swivel seat, and the pointing rod is fixedly mounted on the pointing swivel seat, and a sliding groove is provided on the pointing rod. A connecting rod is slidably mounted in the sliding groove. 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.

[0018] Preferably, the pointing turntable includes a pointing turntable and a limiting turntable, the pointing turntable is rotatably connected to the extension plate, and the pointing turntable is fixedly connected to the pointing rod, the limiting turntable is rotatably connected to the pointing turntable, and the limiting turntable is fixedly connected to the mounting tube; the pointing assembly also 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 the pointing transmission disk is transmission-connected to the limiting turntable, the pointing transmission gear is rotatably installed on the hand-held rod, and the pointing transmission gear is meshed with the pointing transmission disk, the pointing control knob is rotatably installed on the hand-held rod, and the pointing control knob is transmission-connected to the pointing transmission disk.

[0019] Preferably, a fan-shaped groove is provided inside the directional turntable, and a fan-shaped block is fixedly mounted on the limit turntable, and the fan-shaped block is rotatably adapted to the fan-shaped groove.

[0020] The present invention also discloses a method for using a plasma cutting machine for earthquake rescue, which specifically comprises the following steps:

[0021] Use demolition tools to expose the building steel bars to be cut from the concrete structure;

[0022] Place the machine body steadily on the ground near the building to be cut, and assemble the spray gun and mounting components;

[0023] Hold the handle of the auxiliary support device and operate the clamping assembly to clamp the arc-shaped clamping plate on the building steel bar to be cut, then plug and install the connecting pipe and the output socket of the machine body, and start the equipment to cut;

[0024] After cutting is completed, turn off the power of the equipment first, and then remove the auxiliary support device from the cut building steel bars.

[0025] (3) Beneficial effects

[0026] Compared with the prior art, the present invention provides a plasma cutting machine for earthquake rescue and a method of using the same, which has the following beneficial effects:

[0027] 1. This plasma cutting machine for earthquake rescue is equipped with a handheld rod, an extension plate, a mounting assembly and a clamping assembly, so that the auxiliary support device can be clamped and fixed on the building steel bar to be cut, so that the weight of the nozzle and the auxiliary support device is borne by the building steel bar. The nozzle is not easy to shake during cutting, thereby ensuring smooth and accurate cutting. By setting a pointing assembly, the spray gun can be accurately directed to the position to be cut of the building steel bar and cut perpendicular to the axial direction of the building steel bar to ensure cutting efficiency.

[0028] 2. The plasma cutting machine for earthquake rescue is provided with an opening and closing plate, an arc-shaped clamping plate, a slider, a rotating plate and a clamping transmission mechanism, so that earthquake rescue workers can easily clamp the arc-shaped clamping plate onto the building steel bars. At the same time, since the hand-held rod and the extension plate are rotatably connected, by providing a clamping transmission plate, an eccentric rod, a swing rod, a clamping transmission gear and a clamping adjustment knob, the rescue workers holding the hand-held rod can clamp the arc-shaped clamping plate onto the building steel bars that are far away and in narrow spaces that are difficult for people to enter, so that the rescue workers can find a safe working position in a larger range to cut the building steel bars.

[0029] 3. The plasma cutting machine for earthquake rescue can directly insert the handle of the spray gun into the slot of the mounting tube to achieve positioning by providing a mounting tube, a clamping plate, a positioning spring and a pull rod. By providing a pointing swivel seat, a pointing rod and a rotating rod, the spray gun installed in the mounting tube is directed toward the building steel bars clamped by the arc-shaped clamping plate. Since the pointing swivel 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 perpendicularly to the axial direction of the building steel bars, thereby ensuring cutting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is one of the three-dimensional structural schematic diagrams of the plasma cutting machine for earthquake rescue of the present invention;

[0031] Figure 2 This is the second schematic diagram of the three-dimensional structure of the plasma cutting machine for earthquake rescue of the present invention;

[0032] Figure 3 This is the third schematic diagram of the three-dimensional structure of the plasma cutting machine for earthquake rescue of the present invention;

[0033] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the local structure at point A;

[0034] Figure 5 This is the fourth schematic diagram of the three-dimensional structure of the plasma cutting machine for earthquake rescue of the present invention;

[0035] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the local structure at point B in the middle;

[0036] Figure 7 This is one of the exploded schematic views of the three-dimensional structure of the plasma cutting machine for earthquake rescue of the present invention;

[0037] Figure 8 This is the second schematic diagram of the exploded three-dimensional structure of the plasma cutting machine for earthquake rescue of the present invention.

[0038] In the picture:

[0039] 1. Body;

[0040] 2. Spray gun; 21. Card slot;

[0041] 3. Connecting pipe;

[0042] 4.Handheld rod;

[0043] 5. Extension plate; 51. Straight notch;

[0044] 6. Mounting assembly; 61. Mounting cylinder; 62. Clamping plate; 63. Positioning spring; 64. Pull rod; 65. Slot; 66. Backing slot;

[0045] 7. Clamping assembly; 71. Opening and closing plate; 72. Arc-shaped clamping plate; 721. Threaded rod; 722. Clamping block; 73. Slider; 74. Rotating plate; 75. Clamping transmission mechanism; 751. Clamping transmission plate; 752. Eccentric rod; 753. Swinging rod; 754. Clamping transmission gear; 755. Clamping adjustment knob; 76. Return spring;

[0046] 8. Pointing assembly; 81. Pointing swivel seat; 811. Pointing turntable; 812. Position-limiting turntable; 813. Sector slot; 814. Sector block; 82. Pointing rod; 821. Slide slot; 822. Connecting rod; 83. Rotating rod; 84. Pointing transmission mechanism; 841. Pointing transmission disk; 842. Pointing transmission gear; 843. Pointing control knob;

[0047] 9. Angle control mechanism; 91. Incomplete gear; 92. Limit block; 93. Limit spring. DETAILED DESCRIPTION

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0049] Example 1

[0050] See also Figure 1 、 Figure 2 and Figure 7 The present invention provides a plasma cutting machine for earthquake rescue, comprising a machine body 1, a spray gun 2 and an auxiliary support device. The spray gun 2 is provided with a connecting pipe 3, which is detachably mounted to the output socket of the machine body 1. The auxiliary support device is used to replace a human hand to hold the spray gun 2.

[0051] 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 and the extension plate 5 are rotatably connected, the mounting assembly 6 is mounted on the extension plate 5, the handle of the spray gun 2 is detachably mounted on the mounting assembly 6, the clamping assembly 7 is used to clamp the building steel bar to be cut, and the pointing assembly 8 is used to direct the nozzle of the spray gun 2 toward one side of the building steel bar clamped by the clamping assembly 7;

[0052] The clamping assembly 7 includes an opening and closing plate 71, an arc-shaped clamping plate 72, a slider 73, a rotating plate 74 and a clamping transmission mechanism 75. The opening and closing plate 71 is rotatably connected to the extension plate 5, the arc-shaped clamping plate 72 is fixedly mounted on the opening and closing plate 71, the slider 73 is slidably mounted on the extension plate 5, and the two ends of the rotating plate 74 are rotatably connected to the opening and closing plate 71 and the slider 73 respectively. The clamping transmission mechanism 75 includes a clamping adjustment knob 755, which is rotatably mounted on the hand-held rod 4 for controlling the rotation of the slider 73.

[0053] As can be seen from the above, since the hand-held rod 4 and the extension plate 5 are rotatably connected, when the plasma cutting machine is used, the spray gun 2 can be extended into a space that is difficult for rescue personnel to enter. By setting the opening and closing plate 71, the arc-shaped clamping plate 72, the slider 73, and the rotating plate 74, since the opening and closing 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 so that the opening and closing plate 71 is opened, so that the arc-shaped clamping plate 72 can clamp the building steel bars. By setting the clamping transmission mechanism 75 and the clamping adjustment knob 755, the movement of the slider 73 can be controlled by rotating the clamping adjustment knob 755, so that when the spray gun 2 is extended into a space that is difficult for rescue personnel to enter, the arc-shaped clamping plate 72 can be controlled to clamp the building steel bars.

[0054] When using the device, use a demolition tool to expose the building steel bars to be cut from the concrete structure; place the body 1 steadily on the ground near the building to be cut, and assemble the spray gun 2 and the mounting assembly 6; hold the handheld rod 4 of the auxiliary support device and operate the clamping assembly 7 so that the arc-shaped clamping plate 72 is clamped on the building steel bars to be cut, and then plug and install the connecting pipe 3 and the output socket of the body 1, and start the device for cutting; after the cutting is completed, first turn off the power of the device, and then remove the auxiliary support device from the cut building steel bars.

[0055] Example 2

[0056] like Figure 3 and Figure 4 As shown, the difference between this embodiment and the above embodiment is that an angle control mechanism 9 is provided between the hand-held rod 4 and the extension plate 5, and 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 mounted on the hand-held rod 4, the limit block 92 is slidably mounted on the extension plate 5, and the limit block 92 is adapted to be engaged with the incomplete gear 91, and the two ends of the limit spring 93 are fixedly connected to the limit block 92 and the extension plate 5 respectively.

[0057] As can be seen from the above, since the limit block 92 is adapted to be engaged with the incomplete gear 91, when the limit block 92 is in close contact with the incomplete gear 91, the hand-held 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, when the extension plate 5 needs to be rotated, it is only necessary to pull open the limit block 92 to enable the extension plate 5 to rotate.

[0058] Example 3

[0059] like Figure 7 As 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 mounted on the extension plate 5, the eccentric rod 752 is fixedly mounted on the clamping transmission disk 751 at a position deviated from the center of the circle, the two ends of the swing rod 753 are rotatably connected to the eccentric rod 752 and the slider 73 respectively, the clamping transmission gear 754 is rotatably mounted on the hand-held rod 4, and the clamping transmission gear 754 is meshed with the clamping transmission disk 751, and the clamping adjustment knob 755 is transmission-connected to the clamping transmission gear 754; a straight slot 51 is opened on the extension plate 5, and the slider 73 is slidingly connected to the straight slot 51.

[0060] 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 that drives the slider 73 to move back and forth linearly when the clamping transmission disk 751 rotates. At the same time, since the clamping transmission gear 754 is meshed and connected to the clamping transmission disk 751, and the clamping adjustment knob 755 is transmission-connected to the clamping transmission gear 754, rotating the clamping adjustment knob 755 can control the reciprocating linear movement of the slider 73, so that the opening and closing plate 71 is repeatedly opened and closed. Therefore, it is only necessary to rotate the clamping adjustment knob 755 in one direction to continuously realize the opening and closing of the opening and closing plate 71. When the extension plate 5 rotates relative to the hand-held rod 4, the clamping transmission gear 754 and the clamping transmission disk 751 rotate relative to each other, causing the opening and closing of the opening and closing plate 71 to be opened and closed will not limit the use of the clamping assembly 7.

[0061] The arc-shaped clamping plates 72 cooperate to form a circular ring, and threaded rods 721 are threadedly connected to the arc-shaped clamping plates 72 . The threaded rods 721 are distributed in a circular array on the circular ring, and clamping blocks 722 are fixedly installed at the ends of the threaded rods 721 .

[0062] As can be seen from the above, by providing the threaded rod 721, all the clamping blocks 722 can clamp the building steel bars, and the auxiliary support device can be stably hung on the building steel bars without shaking or swaying.

[0063] The clamping assembly 7 further includes a return spring 76 , and both ends of the return spring 76 are respectively mounted on the opening and closing plate 71 .

[0064] As can be seen from the above, by setting the reset spring 76, the two opening and closing plates 71 are subjected to a force that makes them close to each other and close. Therefore, when the rescuer releases the clamping adjustment knob 755, the opening and closing plates 71 are automatically clamped, and the arc-shaped clamping plate 72 can automatically clamp the building steel bars, and the arc-shaped clamping plate 72 will not be always loose.

[0065] Example 4

[0066] like Figure 2 、 Figure 5 、 Figure 6 and Figure 7 As shown, the difference between this embodiment and the above embodiment is that the mounting assembly 6 includes a mounting cylinder 61, a clamping plate 62, a positioning spring 63 and a pull rod 64, a slot 65 is provided on the mounting cylinder 61, a retreat groove 66 is provided at one end of the slot 65, the handle of the spray gun 2 is adapted to be plugged into the slot 65, the clamping plate 62 is arranged inside the retreat groove 66, the pull rod 64 is slidably connected to the mounting cylinder 61, and the pull rod 64 passes through the outer wall of the mounting cylinder 61 and extends to the interior of the mounting cylinder 61 and is fixedly connected to the clamping plate 62, the two ends of the positioning spring 63 are respectively fixedly connected to the clamping plate 62 and the retreat groove 66, and the handle of the spray gun 2 is provided with a clamping slot 21 adapted to the clamping plate 62.

[0067] As can be seen from the above, since the card plate 62 and the card slot 21 are adapted to each other, when the spray gun 2 is inserted into the slot 65 of the mounting tube 61, the card plate 62 squeezes the positioning spring 63 and moves toward the inside of the retreat groove 66. When the spray gun 2 is inserted, under the action of the positioning spring 63, the card plate 62 is automatically inserted into the card slot 21, preventing the spray gun 2 from escaping from the mounting tube 61. When the spray gun 2 needs to be removed, it is only necessary to pull the pull rod 64 to make the card plate 62 escaping from the card slot 21.

[0068] The pointing assembly 8 includes a pointing swivel seat 81, a pointing rod 82 and a rotating rod 83. The pointing swivel seat 81 is rotatably mounted on the extension plate 5, and the rotation axis of the pointing swivel seat 81 and the opening and closing plate 71 are on the same axis. The mounting tube 61 is fixedly connected to the pointing swivel seat 81, and the pointing rod 82 is fixedly mounted on the pointing swivel seat 81, and a slide groove 821 is provided on the pointing rod 82, and a connecting rod 822 is slidably mounted in the slide groove 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.

[0069] 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 installed on the pointing rod 82 through the slide groove 821, and the pointing rod 82 is rotatably installed on the extension plate 5 through the pointing swivel seat 81, and the opening and closing plate 71 and the pointing swivel 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 tube 61 is fixedly connected to the pointing swivel seat 81, the mounting tube 61 can be oriented through the pointing swivel seat 81 so that the spray gun 2 is directed toward the construction steel bars to be cut.

[0070] Example 5

[0071] like Figure 7 and Figure 8 As shown, the difference between this embodiment and the above embodiment is that the pointing turntable 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 tube 61; the pointing assembly 8 also includes a pointing transmission mechanism 84, the pointing transmission mechanism 84 includes a pointing transmission disk 841, a pointing transmission gear 842 and a pointing control knob 843, the pointing transmission disk 841 is rotatably installed on the extension plate 5, and the pointing transmission disk 841 is transmission-connected to the limiting turntable 812, the pointing transmission gear 842 is rotatably installed on the hand-held rod 4, and the pointing transmission gear 842 is meshed with the pointing transmission disk 841, the pointing control knob 843 is rotatably installed on the hand-held rod 4, and the pointing control knob 843 is transmission-connected to the pointing transmission disk 841.

[0072] As can be seen from the above, this embodiment, based on the fourth embodiment, enables the spray gun 2 to rotate in a controlled manner, which is convenient for the spray gun 2 to cut steel bars with larger diameters. Since the pointing turntable 811 is fixedly connected to the pointing rod 82, the direction of the pointing turntable 811 is controlled by the pointing rod 82. Since the limit turntable 812 is connected to the pointing transmission disk 841, the pointing transmission disk 841 is meshed with the pointing transmission gear 842, and the pointing control knob 843 is connected to the pointing transmission disk 841, the rotation of the limit turntable 812 can be controlled by the pointing control knob 843, thereby controlling the nozzle direction of the spray gun 2.

[0073] A fan-shaped groove 813 is provided inside the pointing turntable 811 , and a fan-shaped block 814 is fixedly mounted on the limiting turntable 812 , and the fan-shaped block 814 is rotatably adapted to the fan-shaped groove 813 .

[0074] As can be seen from the above, due to the design of the fan-shaped groove 813 and the fan-shaped block 814, the limiting turntable 812 can only rotate at a small angle relative to the pointing turntable 811, preventing the spray gun 2 from rotating to face backward. Combined with the design in Example 4, the nozzle of the spray gun 2 can rotate at a smaller angle while being able to completely cut large-diameter construction steel bars.

[0075] Example 6

[0076] See also Figure 1 - Figure 8 The present invention also discloses a method for using a plasma cutting machine for earthquake rescue, which comprises the following steps:

[0077] Use demolition tools to expose the building steel bars to be cut from the concrete structure;

[0078] Place the machine body 1 steadily on the ground near the building to be cut, and assemble the spray gun 2 and the mounting assembly 6;

[0079] Hold the handle 4 of the auxiliary support device and operate the clamping assembly 7 so that the arc-shaped clamping plate 72 is clamped on the building steel bar to be cut, then plug and install the connecting pipe 3 and the output socket of the machine body 1, and start the equipment to cut;

[0080] After cutting is completed, turn off the power of the equipment first, and then remove the auxiliary support device from the cut building steel bars.

[0081] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the 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: The spray gun is provided with a connecting pipe, which is detachably mounted to the output socket of the machine body, and the auxiliary support device is used to replace the human hand to hold the spray gun; 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 and the extension plate are rotatably connected. The mounting assembly is mounted on the extension plate. The handle of the spray gun is detachably mounted on the mounting assembly. The clamping assembly is used to clamp the building steel bar to be cut. The pointing assembly is used to direct the nozzle of the spray gun toward one side of the building 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, wherein the opening and closing plate is rotatably connected to the extension plate, the arc-shaped clamping plate is fixedly mounted on the opening and closing plate, the slider is slidably mounted on the extension plate, and both ends of the rotating plate are rotatably connected to the opening and closing plate and the slider respectively, and the clamping transmission mechanism includes a clamping adjustment knob, which is rotatably mounted on the hand-held rod for controlling the rotation of the slider; The mounting assembly includes a mounting tube, a clamping plate, a positioning spring and a pull rod. A slot is provided on the mounting tube, a retreat groove is provided at one end of the slot, the handle of the spray gun is adapted to be plugged into the slot, the clamping plate is arranged inside the retreat groove, the pull rod is slidably connected to the mounting tube, and the pull rod passes through the outer wall of the mounting tube and extends to the interior of the mounting tube 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, and the handle of the spray gun is provided with a clamping slot adapted to the clamping plate; The pointing assembly includes a pointing swivel seat, a pointing rod and a rotating rod. The pointing swivel seat is rotatably mounted on the extension plate, and the rotation axis of the pointing swivel seat and the opening and closing plate are on the same axis. The mounting cylinder is fixedly connected to the pointing swivel seat. The pointing rod is fixedly mounted on the pointing swivel seat, and a sliding groove is provided on the pointing rod. A connecting rod is slidably mounted in the sliding groove. 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. The pointing turntable includes a pointing turntable and a limiting turntable, the pointing turntable is rotatably connected to the extension plate, and the pointing turntable is fixedly connected to the pointing rod, the limiting turntable is rotatably connected to the pointing turntable, and the limiting turntable is fixedly connected to the mounting tube; the pointing assembly also 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 the pointing transmission disk is transmission-connected to the limiting turntable, the pointing transmission gear is rotatably installed on the hand-held rod, and the pointing transmission gear is meshed with the pointing transmission disk, the pointing control knob is rotatably installed on the hand-held rod, and the pointing control knob is transmission-connected to the pointing transmission disk.

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

3. The plasma cutting machine for earthquake rescue according to claim 1, characterized in that: The clamping transmission mechanism includes a clamping transmission disk, an eccentric rod, a swing rod and a clamping transmission gear. The clamping transmission disk is rotatably mounted on the extension plate, the eccentric rod is fixedly mounted on the clamping transmission disk at a position deviated from the center of the circle, the two ends of the swing rod are respectively rotatably connected to the eccentric rod and the slider, the clamping transmission gear is rotatably mounted on the handheld rod, and the clamping transmission gear is meshed with the clamping transmission disk, and the clamping adjustment knob is transmission-connected to the clamping transmission gear; a straight slot is provided on the extension plate, and the slider is slidably connected to the straight slot.

4. The plasma cutting machine for earthquake rescue according to claim 1, characterized in that: The arc-shaped clamping plates cooperate to form a circular ring, and threaded rods are threadedly connected to the arc-shaped clamping plates. The threaded rods are distributed on the circular ring in a ring array, and clamping blocks are fixedly installed on the ends of the threaded rods.

5. The plasma cutting machine for earthquake rescue according to claim 1, characterized in that: The clamping assembly further comprises a return spring, and both ends of the return spring are respectively mounted on the opening and closing plates.

6. The plasma cutting machine for earthquake rescue according to claim 1, characterized in that: A fan-shaped groove is provided inside the directional turntable, and a fan-shaped block is fixedly mounted on the limit turntable. The fan-shaped block is rotatably adapted to the fan-shaped groove.

7. A method for using a plasma cutting machine for earthquake rescue, using the plasma cutting machine for earthquake rescue according to any one of claims 1 to 6, characterized in that: The specific steps are: Use demolition tools to expose the building steel bars to be cut from the concrete structure; Place the machine body steadily on the ground near the building to be cut, and assemble the spray gun and mounting components; Hold the handle of the auxiliary support device and operate the clamping assembly to clamp the arc-shaped clamping plate on the building steel bar to be cut, then plug and install the connecting pipe and the output socket of the machine body, and start the equipment to cut; After cutting is completed, turn off the power of the equipment first, and then remove the auxiliary support device from the cut building steel bars.

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