A metal arc power-free burning rod

Abstract

The present invention discloses a metal arc power-free burning rod, comprising an oxygen cylinder, a gas pressure reducer, a gun head and a metal arc burning rod, wherein the oxygen cylinder is connected to the gas pressure reducer and the gun head in sequence through a pipeline, the other end of the gun head is used to clamp the metal arc burning rod, and a gunpowder coating is provided at the end of the metal arc burning rod. The present invention provides a metal arc power-free burning rod, which can be ignited in the case of power supply, and can also be ignited by using an ignition device such as a lighter in the case of power failure.

Description

Technical Field

[0001] The invention relates to the technical field of burning rods, in particular to a metal arc power-free burning rod. Background Art

[0002] The burning rod can be used as a metal cutter and is widely used in various rescue and emergency situations. It is an indispensable tool in modern firefighting and rescue, and demolition work. Traditional cutters such as oxygen acetylene cutters, toothless saw cutters, gasoline cutters, and hydraulic cutting pliers have limited cutting capabilities and cannot remove high-strength metal obstacles in a timely and effective manner. In the patent with patent number CN201520294921.3, a portable metal arc cutter is provided, but its metal arc burning rod cannot be used in the event of a power failure. In view of this, there is an urgent need for a metal arc power-free burning rod that can be ignited even in the event of a power failure. Summary of the invention

[0003] In view of the above-mentioned prior art, the present invention provides a metal arc power-free burning rod, which can be ignited when there is power, and can also be ignited by using an ignition device such as a lighter in the event of a power failure.

[0004] The technical solution of the present invention is achieved in this way:

[0005] A metal arc power-free burning rod comprises an oxygen cylinder, a gas pressure reducer, a gun head and a metal arc burning rod, wherein the oxygen cylinder is sequentially connected to the gas pressure reducer and the gun head through a pipeline, the other end of the gun head is used to clamp the metal arc burning rod, and a gunpowder coating is provided at the end of the metal arc burning rod.

[0006] Furthermore, the metal arc combustion rod includes a hollow shell, a plurality of oxygen supply pipes and a plurality of solid fuel rods, the oxygen supply pipes and the solid fuel rods are arranged in the hollow shell, the solid fuel rods are located between the oxygen supply pipes, and the oxygen supply pipes are connected to the oxygen channel of the gun head.

[0007] Furthermore, the gas pressure reducer includes an inner tube, an outer tube, a spring, a piston, a connecting rod and a valve. The inner tube is sleeved in the outer tube. The spring and the piston are arranged between the outer tube and the inner tube. The spring is used to push the piston to move in a direction close to the valve. The piston drives the valve to open or close through the connecting rod. One end of the outer tube is provided with a first air hole connected to the atmosphere, and the other end is provided with a second air hole connected to the inner tube. Sealing covers are provided at both ends of the outer tube, one of the sealing covers is provided with a slide groove for passing the connecting rod, and the slide groove is connected to a sealing cover that covers the connecting rod and the control knob of the valve.

[0008] Furthermore, the inner tube is provided with a third air hole at a position between the valve and the sealing cover, and the third air hole is connected to the sealing cover.

[0009] Furthermore, the valve includes a control knob, a screw and a valve core, the control knob is rotatably connected to the inner tube, the valve core is slidably connected to the inner tube, the control knob is provided with a threaded hole, the valve core is provided with a screw threadedly connected to the threaded hole, the control knob is provided with a first gear, and the connecting rod is provided with a first rack meshing with the first gear.

[0010] Furthermore, the inner ring of the piston is connected to the first telescopic tube, the outer ring of the piston is connected to the second telescopic tube, the other end of the first telescopic tube is connected to the inner tube, and the other end of the second telescopic tube is connected to the outer tube.

[0011] Furthermore, one end of the spring is connected to a slider, and the slider is provided with a conical wheel, a second gear and a second rack, the conical wheel is fixedly connected to the second gear, the second gear is meshed with the second rack, the second rack is slidably connected to the slider, one end of the second rack is fixedly connected to the piston, the inner tube is provided with an inclined rail, and the conical wheel fits against the inclined rail and continuously maintains friction; in the process of releasing elastic potential energy of the spring, the contact position between the conical wheel and the inclined rail moves from the end with a smaller diameter of the conical wheel to the end with a larger diameter.

[0012] Furthermore, the conical wheel is provided with a plurality of grooves, and the inclined rail is provided with a plurality of protrusions matching with the grooves.

[0013] The beneficial effect of the present invention is that after the metal arc burning rod is scraped on the ignition plate of the power supply, the power supply is used for ignition. Therefore, the present invention can not only be used for ignition on the power supply, but also can be used for ignition using an open flame when the power supply fails or cannot be used. In addition, the burning rod can still be used for power ignition in water, so that the burning rod can be used in various situations and the rescue time is shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 This is a schematic diagram of the structure of a metal arc power-free combustion rod according to Example 1 of the present invention;

[0016] Figure 2This is a cross-sectional view of a metal arc burning rod according to Example 1 of the present invention;

[0017] Figure 3 This is a schematic structural diagram of a gas pressure reducer according to Embodiment 2 of the present invention;

[0018] Figure 4 This is a schematic structural diagram of a gas pressure reducer according to Embodiment 3 of the present invention;

[0019] Figure 5 A top view of the matching relationship between the tapered wheel and the inclined rail of Example 3 of the present invention;

[0020] Figure 6 A three-dimensional diagram of the matching relationship between the tapered wheel and the inclined rail of Example 3 of the present invention;

[0021] In the figure, 1 oxygen cylinder, 2 gas pressure reducer, 3 gun head, 4 metal arc burning rod, 5 gunpowder coating, 6 hollow shell, 7 oxygen supply pipe, 8 solid fuel rod, 9 inner tube, 10 outer tube, 11 spring, 12 piston, 13 connecting rod, 14 valve, 15 first air hole, 16 second air hole, 17 sealing cover, 18 slide groove, 19 sealing cover, 20 third air hole, 21 control knob, 22 screw, 23 valve core, 24 threaded hole, 25 first gear, 26 first rack, 27 first telescopic tube, 28 second telescopic tube, 29 slider, 30 conical wheel, 31 second gear, 32 second rack, 33 ramp, 34 groove, 35 protrusion. DETAILED DESCRIPTION

[0022] In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0023] Example 1

[0024] See also Figures 1-2A metal arc power-free burning rod comprises an oxygen cylinder 1, a gas pressure reducer 2, a gun head 3 and a metal arc burning rod 4, wherein the oxygen cylinder 1 is connected to the gas pressure reducer 2 and the gun head 3 in sequence through a pipeline, and the other end of the gun head 3 is used to clamp the metal arc burning rod 4, and a gunpowder coating 5 is provided at the end of the metal arc burning rod 4. Oxygen is stored in the oxygen cylinder 1, and the gas pressure reducer 2 and the gun head 3 are connected in sequence through a pipeline, and the gun head 3 clamps the metal arc burning rod 4. The oxygen in the oxygen cylinder 1 is ejected after passing through the gas pressure reducer 2, the gun head 3 and the metal arc burning rod 4, and a gunpowder coating 5 is provided at the end of the metal arc burning rod 4. When welding, the gunpowder coating 5 is ignited by an ignition device such as a lighter, thereby igniting the metal arc burning rod 4. The present invention scrapes the metal arc burning rod 4 on the ignition plate of the power supply, and then uses the power supply for ignition, so the present invention can not only be used for ignition on the power supply, but also can be used for ignition operation using an open flame when the power supply fails or the power supply cannot be used. In addition, the combustion rod can still be ignited with power in water, so that the combustion rod can be used in various situations and the rescue time can be shortened.

[0025] Specifically, the metal arc burning rod 4 includes a hollow shell 6, a plurality of oxygen supply pipes 7 and a plurality of solid fuel rods 8, wherein the oxygen supply pipes 7 and the solid fuel rods 8 are arranged in the hollow shell 6, and the solid fuel rods 8 are located between the oxygen supply pipes 7, and the oxygen supply pipes 7 are connected to the oxygen channel of the gun head 3. The hollow shell 6 protects the oxygen supply pipes 7 and the solid burning rods. During the combustion process, the oxygen supply pipes 7 are arranged around the solid burning rods, and the oxygen discharged by the oxygen supply pipes 7 can be directly absorbed by the solid burning rods, so that the initial combustion is more stable.

[0026] Example 2

[0027] See also Figure 3 The difference between this embodiment and embodiment 1 is that the gas pressure reducer 2 includes an inner tube 9, an outer tube 10, a spring 11, a piston 12, a connecting rod 13 and a valve 14, the inner tube 9 is sleeved in the outer tube 10, the spring 11 and the piston 12 are arranged between the outer tube 10 and the inner tube 9, the spring 11 is used to push the piston 12 to move in a direction close to the valve 14, and the piston 12 drives the valve 14 to open or close through the connecting rod 13, one end of the outer tube 10 is provided with a first air hole 15 connected to the atmosphere, and the other end is provided with a second air hole 16 connected to the inner tube 9, and both ends of the outer tube 10 are provided with sealing covers 17, one of the sealing covers 17 is provided with a slide groove 18 for passing the connecting rod 13, and the slide groove 18 is connected with a sealing cover 19 covering the control knob 21 of the connecting rod 13 and the valve 14.

[0028] A passage for oxygen circulation is formed in the inner tube 9. The inner tube 9 is sleeved in the outer tube 10, and an air cavity capable of storing oxygen is formed between the inner tube 9 and the outer tube 10. A spring 11 and a piston 12 are arranged in the air cavity. The piston 12 divides the air cavity into two parts, left and right. The left part is connected to the outside atmosphere through the first air hole 15, and the right part is connected to the inner tube 9 through the second air hole 16. The air pressure in the right part of the air cavity is the same as the air pressure in the inner tube 9. The spring 11 is used to push the piston 12 to move in the direction close to the valve 14, and the piston 12 drives the valve 14 to open or close through the connecting rod 13. When the air pressure in the inner tube 9 is too high, the piston 12 will move to the left, thereby driving the valve 14 to gradually close through the connecting rod 13, reducing the amount of oxygen entering the inner tube 9, and the air pressure in the inner tube 9 will gradually decrease; when the air pressure in the inner tube 9 is too low, the piston 12 will move to the right, thereby driving the valve 14 to gradually open through the connecting rod 13, increasing the amount of oxygen entering the inner tube 9, and the air pressure in the inner tube 9 will gradually increase. At the same time, due to the effect of the valve 14, the gas pressure reducer 2 automatically opens and closes the valve 14 as the air pressure of the oxygen cylinder 1 changes, so the gas pressure reducer 2 can keep the air pressure of the inner tube 9 relatively stable at a relatively low pressure state. In the process of the metal arc burning rod 4 burning, the air pressure gradually decreases as the oxygen cylinder 1 consumes, but under the effect of the gas pressure reducer 2, the flame of the metal arc burning rod 4 can be kept stable. Sealing covers 17 are provided at both ends of the outer tube 10 so that the air cavity of the right part can be isolated from the outside. The sealing cover 17 near the valve 14 is provided with a slide groove 18 for passing the connecting rod 13, and the slide groove 18 is connected to a sealing cover 19 covering the connecting rod 13 and the control knob 21 of the valve 14. Under the action of the sealing cover 19, oxygen is prevented from leaking out of the slide groove 18, which can promote the stability of the air pressure in the air cavity, save oxygen resources, and prevent accidents.

[0029] Specifically, the inner tube 9 is provided with a third air hole 20 at a position between the valve 14 and the sealing cover 17, and the third air hole 20 is connected to the sealing cover 19. When the connection between the valve 14 and the inner tube 9 is not tight and there is air leakage, the gas can flow into the inner tube 9 from the third air hole 20, reducing the air pressure change of the right part of the air cavity caused by the air leakage, so that the air pressure of the right part of the air cavity is closer to the air pressure of the inner tube 9.

[0030] Specifically, the valve 14 includes a control knob 21, a screw 22 and a valve core 23. The control knob 21 is rotatably connected to the inner tube 9, the valve core 23 is slidably connected to the inner tube 9, the control knob 21 is provided with a threaded hole 24, the valve core 23 is provided with a screw 22 threadedly connected to the threaded hole 24, the control knob 21 is provided with a first gear 25, and the connecting rod 13 is provided with a first rack 26 meshed with the first gear 25. In the process of the connecting rod 13 moving left and right, the first rack 26 fixed on the connecting rod 13 will drive the first gear 25 to rotate, and the first gear 25 is fixedly connected to the control knob 21, so when the connecting rod 13 moves left and right, it will drive the control knob 21 to rotate. The valve core 23 is slidably connected to the inner tube 9, and the valve core 23 can move relative to the radial direction of the inner tube 9, and adjust the gas flow channel cross section of the inner tube 9 during the movement. When the control knob 21 is turned, the threaded hole 24 and the screw rod 22 cooperate with each other through the thread, so when the control knob 21 is turned, the valve core 23 will be driven to move along the radial direction of the inner tube 9, thereby adjusting the diameter of the airflow channel of the inner tube 9 and controlling the oxygen intake. The valve core 23 can be driven to move by the rotation of the control knob 21, but the control knob 21 cannot be driven to rotate by the movement of the valve core 23, so as to avoid pushing the valve core 23 to move when the oxygen pressure in the gas cylinder is high, thereby improving the stability of control. The valve core 23 can only slide along the radial direction of the inner tube 9, and there is a pressure difference on both sides of the valve core 23, so that the valve core 23 is subjected to gas pressure in the left and right directions, but the air pressure is perpendicular to the movement direction of the valve core 23, thereby avoiding the problem that the valve core 23 is pushed open when the air pressure of the oxygen cylinder 1 is high, and the valve core 23 is difficult to close the airflow channel of the inner tube 9 when the pressure of the oxygen cylinder 1 is high.

[0031] Specifically, the inner ring of the piston 12 is connected to the first telescopic tube 27, the outer ring of the piston 12 is connected to the second telescopic tube 28, the other end of the first telescopic tube 27 is connected to the inner tube 9, and the other end of the second telescopic tube 28 is connected to the outer tube 10. The first telescopic tube 27 and the second telescopic tube 28 can be bellows, or tubes made of flexible materials, or tubes made of rubber materials. The first extension tube and the second telescopic tube 28 seal the inner ring and the outer ring of the piston 12 to prevent gas leakage from the inner ring and the outer ring of the piston 12, improve air tightness, and at the same time enable the piston 12 to be gap-matched with the inner tube 9 and the outer tube 10 to reduce sliding friction.

[0032] Example 3

[0033] See also Figures 4 to 6, the difference between this embodiment and embodiment 2 is that one end of the spring 11 is connected to a slider 29, the slider 29 is provided with a conical wheel 30, a second gear 31 and a second rack 32, the conical wheel 30 is fixedly connected to the second gear 31, the second gear 31 is meshed with the second rack 32, the second rack 32 is slidably connected to the slider 29, one end of the second rack 32 is fixedly connected to the piston 12, the inner tube 9 is provided with an inclined rail 33, the conical wheel 30 fits the inclined rail 33 and keeps friction; in the process of the spring 11 releasing the elastic potential energy, the contact position between the conical wheel 30 and the inclined rail 33 moves from the end with a smaller diameter of the conical wheel 30 to the end with a larger diameter. The spring 11 pushes the slider 29 to move in the direction of the piston 12, the conical wheel 30 on the slider 29 contacts the inclined rail 33 fixed to the inner tube 9, the diameter of the conical wheel 30 fits the inclined rail 33 and there is friction that can prevent the conical wheel 30 from sliding relative to the inclined rail 33. The force of the spring 11 pushing the slider 29 acts on the rotating shaft of the conical wheel 30. Due to the friction between the conical wheel 30 and the inclined rail 33, a torque is generated to cause the conical wheel 30 to roll. The torque acts on the second gear 31 and pushes the second rack 32 to move through the second gear 31. In the process of releasing the elastic potential energy of the spring 11, the contact position between the conical wheel 30 and the inclined rail 33 moves from the end with a smaller diameter of the conical wheel 30 to the end with a larger diameter. The distance between the acting force of the spring 11 and the contact point between the conical wheel 30 and the inclined rail 33 increases, and the force arm of the acting force of the spring 11 on the conical wheel 30 increases. The reduction of the acting force of the spring 11 and the increase of the force arm offset each other, so that the torque generated on the conical wheel 30 remains unchanged. Therefore, in the process that the elastic force of the spring 11 gradually decreases, the torque of the cone wheel 30 driving the second gear 31 to rotate remains unchanged, so the thrust generated by the second gear 31 on the second rack 32 remains unchanged, so that the pressure on the piston 12 during the movement remains unchanged, so the air pressure in the right part of the air cavity is always equal to the sum of the atmospheric pressure and the pressure generated by the second gear 31 acting on the piston 12, and the pressure in the right part of the air cavity is kept constant. Therefore, when the air pressure in the pressure reducer is too high, the piston 12 will move to the left to drive the valve 14 to reduce the air flow channel until the air pressure is equal to the preset value. When the air pressure in the pressure reducer is too low, the piston 12 will move to the right to drive the valve 14 to increase the air flow channel until the air pressure is equal to the preset value. The problem of unstable air pressure in the pressure reducer caused by the different thrusts generated by the spring 11 with different deformation amounts is greatly reduced.

[0034] Specifically, the conical wheel 30 is provided with a plurality of grooves 34, and the inclined rail 33 is provided with a plurality of protrusions 35 that cooperate with the grooves 34. The friction between the conical wheel 30 and the inclined rail 33 is increased to prevent the conical wheel 30 from slipping.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A metal arc burning rod without power supply, It is characterized in that It includes an oxygen cylinder, a gas pressure reducer, a gun head and a metal arc burning rod. The oxygen cylinder is connected to the gas pressure reducer and the gun head in sequence through a pipeline. The other end of the gun head is used to clamp the metal arc burning rod. The end of the metal arc burning rod is provided with a gunpowder coating. The gas pressure reducer includes an inner tube, an outer tube, a spring, a piston, a connecting rod and a valve. The inner tube is sleeved in the outer tube. The spring and the piston are provided between the outer tube and the inner tube. The spring is used to push the piston to move in a direction close to the valve. The piston drives the valve to open or close through the connecting rod. One end of the outer tube is provided with a first air hole connected to the atmosphere, and the other end is provided with a second air hole connected to the inner tube. Both ends of the outer tube are provided with sealing covers, one of the sealing covers is provided with a sliding groove for passing the connecting rod, and the sliding groove is connected with a sealing cover with a control knob covering the connecting rod and the valve The valve includes a control knob, a screw and a valve core, the control knob is rotatably connected to the inner tube, the valve core is slidably connected to the inner tube, the control knob is provided with a threaded hole, the valve core is provided with a screw threadedly connected to the threaded hole, the control knob is provided with a first gear, the connecting rod is provided with a first rack meshed with the first gear, one end of the spring is connected to a slider, the slider is provided with a conical wheel, a second gear and a second rack, the conical wheel is fixedly connected to the second gear, the second gear is meshed with the second rack, the second rack is slidably connected to the slider, one end of the second rack is fixedly connected to the piston, the inner tube is provided with an inclined rail, the conical wheel fits the inclined rail and continuously maintains friction; in the process of releasing the elastic potential energy of the spring, the contact position between the conical wheel and the inclined rail moves from the end with a smaller diameter of the conical wheel to the end with a larger diameter.

2. A metal arc power-free burning rod according to claim 1, It is characterized in that The metal arc burning rod comprises a hollow shell, a plurality of oxygen supply pipes and a plurality of solid fuel rods, wherein the oxygen supply pipes and the solid fuel rods are arranged in the hollow shell, the solid fuel rods are located between the oxygen supply pipes, and the oxygen supply pipes are connected to the oxygen channel of the gun head.

3. A metal arc power-free burning rod according to claim 1, It is characterized in that The inner tube is provided with a third air hole at a position between the valve and the sealing cover, and the third air hole is connected to the sealing cover.

4. A metal arc power-free burning rod according to claim 1, It is characterized in that The inner ring of the piston is connected to the first telescopic tube, the outer ring of the piston is connected to the second telescopic tube, the other end of the first telescopic tube is connected to the inner tube, and the other end of the second telescopic tube is connected to the outer tube.

5. A metal arc power-free burning rod according to claim 1, It is characterized in that The conical wheel is provided with a plurality of grooves, and the inclined rail is provided with a plurality of protrusions matched with the grooves.

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