JP2005201613A - Burner for liquid fuel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent dripping of fuel in an un-gasified liquid state from a burner in regard to a gas welding or gas cutting burner for liquid fuel such as gasoline. <P>SOLUTION: In the burner, complete gasification is carried out by mixing and agitating high pressure oxygen with fuel supplied in an un-gasified liquid state. By providing a spiral wall in the burner, a communication distance of high pressure mixed gas in the burner becomes long, combustion occurs even in the burner, the whole burner is heated, gasification of the fuel supplied to the burner in the un-gasified liquid state is promoted by the superheated burner, and as a result, dripping from the burner in a liquid state as in a conventional burner is prevented. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a crater used for gas welding and gas cutting using liquid fuel such as gasoline as fuel.

Gas welding or gas cutting using acetylene gas or the like is widely used as a means for welding or cutting steel materials. The gas welding or gas cutting is supplied to a torch through a hose from a gas cylinder filled with a combustible gas compressed with acetylene gas or the like and a high pressure oxygen cylinder filled with a compressed high pressure oxygen. A torch, also called a blowpipe, has been widely used in the past and will not be described in detail, but a worker who performs welding or cutting takes in the gripping part for gripping the torch, the combustible gas, and the high-pressure oxygen, respectively. It has a high-pressure oxygen inlet and a combustible gas inlet, and the combustible gas and the high-pressure oxygen are guided to the torch head through respective conduits piped in the torch. In this case, the combustible gas conduit and the high-pressure oxygen conduit include a combustible gas control valve and a high-pressure oxygen amount for adjusting the amount of combustible gas at the inlet portion of the combustible gas and the high-pressure oxygen and an intermediate portion of the torch head. It has a high-pressure oxygen control valve for adjusting the pressure. The torch head has a cylindrical crater inner cylinder that is hollow inside and has both ends penetrated, and a cylindrical crater outer cylinder that fits on the outer periphery of the crater inner cylinder. A crater having a structure in which the outer peripheral surface and the inner peripheral surface of the crater outer cylinder have a gap and both ends pass through is screwed and joined. Here, as a versatility, the high-pressure oxygen conduit passes through the inner space of the crater inner cylinder, and the combustible gas conduit extends in the gap between the outer surface of the crater inner cylinder and the inner peripheral surface of the crater outer cylinder. It has a structure of fitting and joining so as to penetrate.

In the torch having the above structure, the combustible gas and the high pressure oxygen are respectively supplied from the gas cylinder and the high pressure oxygen cylinder through the hose and supplied from the combustible gas inlet and the high pressure oxygen inlet to the respective conduits in the torch. The flammable gas is guided to the torch head and the other end of the crater screwed end is passed through the gap between the outer peripheral surface of the crater inner cylinder and the inner peripheral surface of the crater outer cylinder screwed and joined to the torch head. From the other end of the crater, the high-pressure oxygen passes through the inside of the crater inner cylinder screwed and joined to the torch head. The combustible gas will be mixed at the tip of the crater. When the high-pressure mixed gas mixed at the tip of the crater is ignited, a high-temperature flame is formed, and gas welding or gas cutting is performed by adjusting the amount of flammable gas and high-pressure oxygen with the flammable gas adjustment valve and high-pressure oxygen adjustment valve. The firepower that is suitable for is obtained. Note that a check valve for preventing backflow and backfire is installed in the combustible gas and high-pressure oxygen conduit in the torch, but a detailed description thereof is omitted here.

The use of flammable gas such as acetylene gas or LPG gas is widely used as a heat source for gas welding or gas cutting to weld or cut steel materials, but the unit price is cheaper than acetylene gas or LPG gas and it is easier to handle in terms of safety. However, gasoline such as acetylene gas or LPG gas, which does not change from the thermal power temperature, has begun to be used as a heat source for the gas cutting or gas welding.

FIG. 1 is an overall front view of a gas welding or gas cutting torch that uses liquid fuel such as gasoline as fuel. A hose is connected to a high pressure oxygen inlet 3 of the torch 1 from a high pressure oxygen cylinder (not shown). On the other hand, gasoline is stored in a pressure tank (not shown) equipped with a pressure pump, and a hose from the pressure tank is connected to the liquid fuel inlet 4 of the torch 1. Here, the gasoline is constantly ejected by the pressure in the pressure tank. The high-pressure oxygen supplied from the high-pressure oxygen inlet is guided to the high-pressure oxygen circulation pipe 9 through a conduit provided inside the grip portion 11. A high-pressure oxygen adjusting valve 5 is provided at the end of the high-pressure oxygen circulation pipe, and the high-pressure oxygen amount can be adjusted by this valve, and the high-pressure oxygen pipe is a branch pipe for a liquid fuel such as gasoline. The amount of high-pressure oxygen supplied from the branch pipe is adjusted by a high-pressure mixed gas adjustment valve 7. On the other hand, the gasoline supplied from the liquid fuel inlet passes through a conduit provided inside the gripper 11 and is led to the high-pressure mixed gas circulation pipe 8 which joins the high-pressure oxygen led by the branch pipe. Further, a liquid fuel adjustment valve is provided at the end of the high-pressure mixed gas flow pipe so that liquid fuel such as gasoline can be adjusted. The purpose of joining the high-pressure oxygen to the liquid fuel conduit by the aforementioned branch pipe is to gasify the liquid fuel such as gasoline by mixing the high-pressure oxygen with the liquid fuel such as gasoline. Gasified liquid fuel such as gasoline is led to the torch head 10 through the high-pressure gas mixture pipe, and high-pressure oxygen is led to the torch head 10 through the high-pressure oxygen pipe 9.

FIG. 2 is a three-dimensional view of a torch head with a crater. High-pressure oxygen passes through a high-pressure oxygen circulation pipe 9, and liquid fuel such as gasified gasoline enters a torch head 10 through a high-pressure mixed gas circulation pipe 8. A crater is screwed to and attached to the torch head 10 by a crater base tightening nut 14. FIG. 6 is a sectional view of the torch head portion with a crater. The crater as a whole has a cylindrical shape in which the inside is hollow and both ends penetrate, and the crater insertion port in which the outer periphery of the end on the side to be joined to the torch head 35 has a tapered shape, and the cylindrical shaft The ring-shaped bag retaining nut that is longer than the cylindrical outer diameter and has a tapered end at the bottom of the direction, and the cylindrical outer diameter that is adjacent to the cylindrical shaft and that is adjacent to the cylindrical shaft A crater-matching cylinder that is longer and shorter than the outer diameter of the tackle stopper is formed, and here, the hook-stopper and the crater-matching cylinder are outside the crater insertion slot when viewed from the front in the cylindrical shape axial direction. A plurality of holes 41 penetrates along the cylindrical axis in the same outer diameter radially from the cylindrical axis and larger than the outer diameter of the crater cylinder, and the other end, that is, the flame ejection side On the outer periphery of the end portion, the outer surface of the crater inner cylinder 42 is in contact with the inner surface of the crater outer cylinder 43 described later and A crater inner cylinder 42 having a projecting structure for providing a gap between the inner surfaces of the outer cylinder 43, and a cylindrical shape inscribed in the outer periphery of the crater alignment cylinder of the crater inner cylinder 42 and the outer periphery of the projecting structure at the upper part in the axial direction. A crater having a structure including a crater outer cylinder 43 having the same shape as the outer diameter of the forehead stopper and a crater base tightening nut 39 of a cap nut that freely moves in the axial direction of the previous period. A crater is screwed to a male screw cut on the outer periphery of the lower part of the torch head 35 and is screwed to the torch head 35.

In the torch head and crater having the above-described structure, the high-pressure oxygen A passes through the high-pressure oxygen flow pipe 33, the torch head inner hole 36, and the crater inner hole 44 and is released to the outside from the tip of the crater. On the other hand, the high pressure mixed gas B is discharged from the tip of the crater through the high pressure mixed gas flow pipe 37, the torch head outer hole 38, the torch head gap hole 40, the forehead retaining hole 41 and the crater gap hole 45. Here, the high-pressure oxygen A and the high-pressure mixed gas B released from the tip of the crater are mixed with each other and become an optimum gas for combustion, and when ignited, high-temperature jet combustion suitable for gas welding or gas cutting is performed.

In a conventional gas cutting and gas welding torch using liquid fuel such as gasoline, the liquid fuel such as gasoline supplied from the liquid fuel inlet 4 circulates the high pressure oxygen supplied from the high pressure oxygen 3 and the high pressure mixed gas flow. The gas is mixed and gasified at the end of the pipe 8, but the high-pressure mixed gas flow pipe is in a liquid state in which liquid fuel such as gasoline is not gasified due to the malfunction of the high-pressure mixed gas regulating valve 7 or the liquid fuel regulating valve 6. There was also a case of passing. Even when the adjustment of the high pressure mixed gas adjusting valve 7 or the liquid fuel adjusting valve 6 is optimal and all liquid fuel such as gasoline is gasified and passes through the high pressure mixed gas circulation pipe, it is provided in the torch head 10. The cross-sectional area of the outer hole of the torch head, which is the high-pressure mixed gas flow gap, is often smaller than the cross-sectional area of the high-pressure mixed gas flow pipe because of the workability of an operator to hold the torch and perform gas welding or gas cutting. When the high-pressure mixed gas that has passed through the high-pressure mixed gas flow pipe in the gasified state passes through the outer hole of the torch head having a small cross-sectional area, a part of the high-pressure mixed gas may return to the liquid. If liquid fuel such as gasoline passes through the crater without being gasified, the liquid fuel such as gasoline will not burn and crater combustion if there is a large amount of liquid that does not gasify even before or after ignition. In some cases, water droplets hang from the part. Such a liquid fuel such as gasoline is not gasified but drops into water droplets and drops from the crater. For example, when welding or cutting work is performed at a high place, it may fall on a person working at a low place. If there are flammable materials in low places, the risk of fire increases.

In order to solve the above problems, the gas cutting crater and gas welding crater using liquid fuel such as gasoline according to the present invention is a crater attached to a torch head, that is, a blow pipe head, and the inside is hollow and both ends are passed. Torch head inner hole through which a high-pressure oxygen in the torch head is formed by forming a cylindrical shape penetrating the outer shape of the cylindrical shape, i.e., the end of the contact side with the torch head. A tapered crater outlet and a cylindrical outer periphery of the crater insertion hole and a cylindrical shape that tapers upward from the upper portion to the lower position in the cylindrical axial direction and protrudes radially from the cylindrical shaft. A ring-shaped crater joint projecting radially from the cylindrical shaft that is larger than the outer diameter of the crater insertion port and smaller than the outer diameter of the forehead at the lower position in the axial direction, adjacent to the ring-shaped basin Forming a barrel, where the front end of the forehead and the axial length of the crater alignment cylinder is longer than the outer diameter of the previous crater insertion port and shorter than the crater alignment cylinder and radiates from the cylindrical shaft. A high pressure mixed gas circulation hole having a plurality of holes along the axial direction of the cylinder at the position of the pipe, and the plurality of holes are continuously connected from the high pressure mixed gas circulation pipe to the inside of the torch head to circulate high pressure oxygen. The high pressure mixed gas flow is caused by pressing the barbs with the tapered shape against the circular outer frame of the torch head in the gap hole provided between the outer peripheral surface of the inner hole of the torch head and the inner surface of the circular outer frame of the torch head. A high-pressure gas mixture is circulated in a consistent connection with the holes, and the inner diameter of the cylindrical shape is smaller than the crater alignment cylinder from the crater alignment cylinder to the lower part in the cylindrical axial direction. High pressure oxygen flows near the top of the cylinder There are one or two high-pressure oxygen injection holes through which the cylindrical cavity is perforated to inject high-pressure oxygen into the inner cylinder surface, and the outer peripheral surface of the protrusion protrudes in a tapered shape at the outer peripheral portion of the cylindrical shape. A crater inner cylinder having a rectifying portion provided with a plurality of grooves adapted to the tapered shape along the longitudinal direction of the cylindrical shape, and an upper portion fitted by the rectifying cylinder and the rectifying portion of the crater inner cylinder A cylindrical crater outer cylinder having a protrusion-shaped flange portion that is the same as or smaller than the outer diameter of the first tacking stopper, and a male screw cut below the torch head by a cap nut that moves freely in the cylindrical axial direction. A crater having a crater base fastening nut for screwing and joining the crater, and high-pressure oxygen flows from the high-pressure oxygen circulation pipe to a torch head inner hole in the torch head and is screwed by the crater base fastening nut. Jointed crater bore And is ejected from the end of the crater. On the other hand, the high-pressure mixed gas reaches from the high-pressure gas mixing flow pipe to the front torch head outer hole, the first torch head gap hole and the crater gap formed in the outer periphery of the inner wall of the torch head inner hole in the torch head. Here, a part of the high-pressure mixed gas such as gasoline flowing through the high-pressure mixed gas circulation pipe is not gasified but is gasified when flowing through the liquid fuel such as gasoline or the high-pressure mixed gas circulation pipe flowing in a liquid state. Even in such a state, liquid fuel such as gasoline whose high pressure gas has returned to liquid in the outer hole of the torch head where the pipe line is narrowed is again stirred and gasified by the high pressure oxygen ejected from the oxygen ejection hole. As a result, it will be ejected from the tip of the crater through the rectifying hole of the rectifying unit, and there will be no dripping in the liquid state from the tip of the crater generated by gas welding or gas cutting using conventional liquid fuel such as gasoline. is there.

In the crater of the present invention having the above-described characteristics, a structure is provided in which a spiral wall in a state where the top surface is in close contact with the inner surface of the crater outer cylinder is provided on the outer periphery of the inner cylinder so that the high-pressure mixed gas flows through the crater gap for a longer distance. Combustion of high-pressure oxygen and high-pressure gas mixture ignited at the end of the crater occurs in the spiral wall space, and the entire crater is heated, so that liquid fuel such as gasoline is not completely gasified. Therefore, dripping of the liquid fuel from the tip of the crater, which tends to occur in conventional gas welding and gas cutting using a liquid fuel such as gasoline, can be prevented.

In the case of gas welding and gas cutting craters that use liquid fuels such as gasoline, with the conventional crater structure, some liquid fuels such as gasoline hang from the tip of the crater during combustion in the state of liquid fuel without being gasified There is also a risk that liquid fuel such as flammable gasoline may fall on a person working in a low place or work on a flammable material to cause a fire. In the crater, the fuel supplied in the liquid state without being gasified is mixed with high-pressure oxygen and stirred to achieve complete gasification, and by further providing a spiral wall in the crater, high-pressure mixing in the crater Since the gas flow distance becomes longer, combustion occurs in the crater, resulting in heating of the entire crater, and the fuel supplied to the crater in the form of liquid fuel without gasification is also gasified by the overheated crater. Inspired, produces the effect that no dripping from the crater in the conventional liquid state, such as.

An embodiment of the liquid fuel crater according to the present invention will be described with reference to the drawings. However, the following examples are merely examples for embodying the basic idea of the present invention, and the present invention is not limited or limited to the following examples.

FIG. 3 is a front view of the present invention, and FIG. 4 is a sectional view of a torch head portion with a crater. In the crater attached to the torch head, the outer shape of the upper part of the cylindrical inner cylinder 20 that is hollow inside and penetrated at both ends, that is, the outer shape on the contact side with the torch head is consistently connected from the high-pressure oxygen circulation pipe of the torch. In addition, the crater insertion port 17 and the outer periphery of the inner cylinder 20 are tapered so as to be closely connected to the inner hole of the torch head through which high-pressure oxygen in the torch head flows. A ring-shaped tack 18 that is shaped and protrudes radially from the axis of the inner cylinder 20 and an outer diameter of the tack 18 that is adjacent to the tack and is lower than the outer diameter of the crater insertion port 17 at the lower position in the axial direction. A ring-shaped crater aligning cylinder 19 projecting radially from the shaft of the inner cylinder 20 is formed, and the outer side of the crater insertion port 17 is viewed from the front in the longitudinal direction of the rod stopper 18 and the crater aligning cylinder 19. Longer than the diameter of the crater barrel 19 It is a tacking high-pressure mixed gas flow hole 28 having a plurality of holes 23 that are shorter than the diameter and extending radially from the shaft to the radial position. The plurality of holes 23 are connected to the inside of the torch head 10 from the high-pressure mixed gas flow pipe 9. The torch head circular outer frame of the torch head outer hole 27 provided between the outer peripheral surface of the torch head inner hole 30 and the torch head circular outer frame inner surface through which high pressure oxygen is circulated in a consistent manner, and the barbs 18 having a tapered shape. Is connected to the high-pressure mixed gas flow hole to form a structure in which the high-pressure mixed gas flows. The inner cylinder 20 has an outer diameter smaller than the crater-matching cylinder from the crater-matching cylinder 19 to the axially lower portion. Thus, the inner cylinder 20 has one or two high-pressure oxygen injection holes 24 through which a cylindrical hollow portion 22 through which high-pressure oxygen flows is pierced near the upper end of the inner cylinder 20 and jets high-pressure oxygen to the surface of the inner cylinder 20. There is a tape on the outer periphery of the tip. A crater inner cylinder 13 having a rectifying portion 21 provided with a plurality of grooves which are projected in a shape and whose outer surface is aligned with the tapered shape along the longitudinal direction of the axis; and a crater alignment cylinder 19 of the crater inner cylinder 13; The torch includes a cylindrical crater outer cylinder 12 fitted with a rectifying portion 21 and having a protruding flange portion 15 having an outer diameter that is the same as or smaller than the outer diameter of the stopper 18 and a cap nut that moves freely in the axial direction. A crater having a structure including a crater base fastening nut 14 for screwing and joining a male screw cut at a lower portion of the head and a crater, and high-pressure oxygen is supplied from a high-pressure oxygen circulation pipe 9 to a torch head inner hole 30 in the torch head 10. It flows through the crater inner hole 22 that is circulated and screwed and joined by the crater base fastening nut 14 and is ejected from the end of the crater. On the other hand, the high pressure mixed gas is from the high pressure gas mixing flow pipe 8 to the outer periphery of the wall of the torch head inner hole 30 in the torch head 10, the torch head outer hole 26 in the gap, the torch head gap hole 27, the crater inner cylinder 13 and the crater. It reaches the crater gap 32 that is the gap between the outer cylinders 12. Here, a part of the high-pressure mixed gas such as gasoline flowing through the high-pressure mixed gas circulation pipe 8 is not gasified but is gasified when flowing through the liquid fuel such as gasoline or the high-pressure mixed gas circulation pipe flowing in a liquid state. Even in such a state, the liquid fuel such as gasoline whose high pressure gas has returned to liquid in the torch head outer hole 26 where the pipe is constricted is again stirred and gasified by the high pressure oxygen ejected from the oxygen ejection hole 24. Thus, it will be ejected from the tip of the crater through the rectifying hole 25 of the rectifying unit 21, and the dripping in the liquid state from the tip of the crater generated by gas welding or gas cutting using conventional liquid fuel such as gasoline is eliminated. It is.

FIG. 5 is an enlarged cross-sectional view of the crater. In the crater of the present invention having the above-described features, a spiral wall 16 is provided on the outer periphery of the crater inner cylinder 13 so that the top surface is in close contact with the inner surface of the crater outer cylinder 12. Thus, the crater has a structure in which the high-pressure mixed gas flows through the crater gap 32 for a longer distance, and combustion of the high-pressure oxygen and high-pressure mixed gas ignited at the end of the crater occurs in the spiral wall gap. The entire tip is heated so that non-gasified liquid fuel such as gasoline can be completely gasified and burned at the same time, and the tip of a crater that tends to occur in conventional gas welding and gas cutting using liquid fuel such as gasoline It is possible to prevent liquid fuel from dripping. Explaining in more detail with reference to FIG. 5, high-pressure oxygen A passes through the crater inner hole 31 and is ejected from the tip of the crater, but part of the high-pressure oxygen is one or two oxygen provided in the crater inner cylinder 13. It is ejected from the ejection hole 24 to the crater gap 32 (A1). On the other hand, the high-pressure mixed gas B of liquid fuel such as gasoline passes through the anchoring gap hole 28 and reaches the crater gap 32, and enters the rectifying hole 25 while being spirally circulated (B 1) by the spiral wall 16 in the crater gap 32. It is ejected from the tip of the crater. Here, a part of the high-pressure gas B of liquid fuel such as gasoline may enter the crater gap 32 in a liquid state without being gasified. At this time, the liquid fuel that is not gasified is ejected from the oxygen ejection hole 24. Is mixed and stirred by the high-pressure oxygen A1 to be completely gasified. Further, since the high-pressure mixed gas B passing through the crater gap 32 by the spiral wall 16 has a long distance and the crater gap 32 partitioned by the spiral wall 16 is wide enough to burn, combustion at the tip of the crater Is generated in the crater gap 32. As a result, the entire crater is heated, and liquid fuel such as gasoline that is not gasified by heating the entire crater is also gasified and simultaneously burns.

Torch front general view Three-dimensional view of torch head with crater Crater front view Cross section of torch head with crater Crater cross-sectional enlarged view Cross section of torch head with crater

Explanation of symbols

1 ···· Torch 2 ··· Tinder 5 ··· High pressure oxygen adjustment valve 6 ··· Liquid fuel adjustment valve 7 ··· High pressure mixed gas adjustment valve 8... High pressure mixed gas flow pipe 9... High pressure oxygen flow pipe 10... Torch head 12. ··· Tightening nut 15 ··· Throat 16 · · · Spiral wall 17 · · · Tinder insertion port 18 · · · Tightening 19 · · · Tinder Matching cylinder 20 ... Inner cylinder 21 ... Rectification part 22 ... Fastening high pressure oxygen flow hole 23 ... Fastening high pressure mixed gas flow hole 24 ... High pressure Oxygen injection hole 25 ... rectifying groove

Claims (2)

Cylindrical crater inner cylinder that has a hollow inside, both ends penetrated, and the outer circumference of both ends protrudes thickly, and a cylindrical crater that fits into both end protrusions of the crater inner cylinder and encloses the crater inner cylinder A crater having an outer cylinder, the crater inner cylinder projections at both ends are provided with a plurality of holes in the axial longitudinal direction, and there is a sufficient gap between the outer surface of the crater inner cylinder and the inner surface of the crater outer cylinder, The flow path formed by the cavity in the crater inner cylinder and the flow path formed between the crater inner cylinder and the crater outer cylinder form an independent flow path structure, and further between the outer surface of the crater inner cylinder and the inner surface of the crater outer cylinder. A structure in which one or a plurality of perforations are provided in the inner wall of the crater in the gap portion and a flow path formed by a cavity in the crater inner cylinder is connected to a flow path formed between the crater inner cylinder and the crater outer cylinder A gas welding and gas cutting crater for liquid fuel such as gasoline. The gas welding and gas cutting crater for liquid fuel such as gasoline according to claim 1, wherein the top portion is on the outer surface of the crater inner cylinder in the gap between the outer surface of the crater inner cylinder and the inner surface of the crater outer cylinder. A gas welding and gas cutting crater for liquid fuel such as gasoline, characterized by having a spiral wall that is in close contact and lengthening a flow passage formed between the crater inner cylinder and the crater outer cylinder.

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