JP2896352B2 - Gas processing torch ignition method and gas processing torch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas processing torch for performing cutting, welding, scarfing, and the like, and more particularly to automatic ignition of a crater required for automation.

[0002]

2. Description of the Related Art Heretofore, a gas working torch has been manually ignited by a lighter or the like. However, this requires a lot of time and labor for setting up before work, and automation of ignition has been desired because of the need for a large number of personnel.

[0003] Taking a gas cutting torch as an example, various parts are provided around the gas cutting torch in order to save labor and automate the cutting operation, prevent damage to the cutting torch, or improve the quality of the cut surface. Devices have been selectively added. For example, a sensor for misfire detection that detects that a flame is formed at the crater and cutting is being performed, and a certain distance to prevent the effects of heat due to the flame and the heat generated due to the combustion of the base material In order to maintain, a sensor for detecting the height from the cut material is arranged.

One such device is an ignition device 30 as shown in FIG. The ignition device 30 is attached to the cutting torch 31, and the nozzle 33 is arranged toward the tip of the cutting crater 32. By forming a pilot flame in the nozzle 33, the cutting crater 32 can be automatically ignited, and this is particularly effective in forming a flame simultaneously in a cutting machine having a plurality of cutting torches 31.

[0005]

However, in the above-described ignition device, the ignition device 30 is attached so as to be added to the outside of the cutting torch 31, and ignition energy such as high-frequency power is applied to the ignition section 34 to thereby provide the ignition device 30. Must be ignited. Therefore, the equipment configuration around the cutting torch 31 becomes complicated, and one torch is required only for ignition, so that the manufacturing cost is unavoidably increased.

In the ignition device having the above-described structure, first, the nozzle 33 is ignited, and the preheated mixed gas ejected from the tip of the cutting crater 32 is ignited by the formed pilot flame. Therefore, unless both the ignition rate of the nozzle 33 and the ignition rate from the nozzle 33 to the cutting tip 32 are high, the final ignition rate to the gas cutting tip 32 will decrease.

[0007] The additional device exposed to the outside is susceptible to adverse effects such as the surrounding environment and dirt. In cutting, water is sprayed to prevent distortion of the cut material.In particular, in the igniter 30, the water evaporates and adheres to the igniting portion 34, making it impossible to ignite or dust. Adsorption may cause poor ignition.

[0008] A planar cutter for cutting a steel plate in a straight line and an NC cutter for cutting a die are generally constructed by mounting a plurality of gas cutting torches on a garter. However, if an apparatus is added around the cutting torch as described above, unless the gap between the gas cutting torches is secured, the additional apparatus may come into contact with another gas cutting torch and be damaged. Therefore, there is a problem that the cutting interval cannot be reduced to a certain extent or more, and the capability of the cutting device is limited.

[0009]

According to the present invention, there is provided a method of igniting a gas processing torch according to the present invention, wherein a deflagration fuel gas and a deflagration oxygen gas are supplied to a gas processing torch. The deflagration fuel gas and the deflagration oxygen gas are mixed inside the torch to generate a deflagration mixed gas, or a premixed deflagration fuel gas is supplied to the gas processing torch, and the gas processing torch is provided. A deflagration flame is formed by igniting the deflagration fuel gas inside the refuse, and the gas processing torch is ignited with the deflagration flame.

[0010] The gas processing torch according to the present invention comprises:
A gas processing torch for processing a workpiece by generating a flame by supplying a fuel gas and an oxygen gas, comprising: a deflagration fuel gas supply means for supplying a deflagration fuel gas; and a deflagration oxygen gas supply. Deflagration oxygen gas supply means, deflagration fuel gas and the deflagration oxygen gas are mixed to generate a deflagration mixture gas, and a deflagration flame passage having an opening at the tip of the torch; And a heat source for ignition arranged.

Another configuration of the gas processing torch according to the present invention is a gas processing torch that supplies fuel gas and oxygen gas to generate a flame to perform cutting, welding, and the like. A deflagration mixed gas supply means for supplying a deflagration mixed gas in which a gas and a deflagration oxygen gas are mixed in advance; a deflagration flame passage which is supplied with the deflagration mixed gas and has an opening at a torch tip; A heat source for ignition arranged in the passage.

The gas processing torch is a gas cutting torch, a cutting oxygen gas supply means for supplying a cutting oxygen gas, and a cutting oxygen passage for passing the cutting oxygen gas and having an opening at the tip of the torch. A preheating fuel gas supply means for supplying a preheating fuel gas; a preheating oxygen gas supply means for supplying a preheating oxygen gas; and a preheating mixture by mixing the preheating fuel gas and the preheating oxygen gas. A preheating mixed gas generating means for generating gas; and a preheating flame outlet provided at the tip of the torch for jetting the preheating mixed gas, wherein the deflagration oxygen gas supply means includes the cutting oxygen gas supply. Or a preheating oxygen gas supply means.

The gas processing torch is a gas cutting torch, a cutting oxygen gas supply means for supplying a cutting oxygen gas, and a cutting oxygen passage for passing the cutting oxygen gas and having an opening at the tip of the torch. A preheating fuel gas supply means for supplying a preheating fuel gas; a preheating oxygen gas supply means for supplying a preheating oxygen gas; and a preheating mixture by mixing the preheating fuel gas and the preheating oxygen gas. A preheating mixed gas generating means for generating gas; and a preheating flame outlet provided at the tip of the torch for jetting the preheating mixed gas. The deflagration fuel gas supply means includes the preheating fuel gas. It is a supply means.

In the gas processing torch, the deflagration flame passage is the cutting oxygen passage, and the opening of the deflagration flame passage is the opening of the cutting oxygen passage.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A gas cutting torch will be described as an example of a gas processing torch according to the present invention, and an ignition method of a gas processing torch according to the present invention will be described. FIG.
2 is a partial sectional view of the gas cutting torch according to the first embodiment, FIG.
FIG. 3 is a sectional view taken along line AA in FIG. 1, FIG. 3 is a front view of the tip of the gas cutting torch, and FIG. 4 is a fluid system diagram.

A gas cutting torch 1 shown in FIG. 1 has a head 2 at the tip and a crater 3 attached to the head 2. At the rear end of the gas cutting torch 1, a preheating oxygen valve 4a as a preheating oxygen gas supply means, a preheating fuel valve 4b as a preheating fuel gas supply means, and a cutting oxygen valve 4c as a cutting oxygen gas supply means are provided. The configuration is such that tail adjustment of the flow rate of the corresponding gas can be performed.

The preheating oxygen valve 4a is connected to the crater 3 by a preheating oxygen passage 5a.
b is a preheating fuel passage 5b, and the cutting oxygen valve 4c is connected to the crater 3 by a cutting oxygen passage 5c. The crater 3 has an injection structure, in which the preheating oxygen gas sucks the preheating fuel gas and mixes to generate a preheating mixed gas, and the preheating mixed gas is injected into a preheating flame jet at the tip of the crater 3 shown in FIG. It can be ejected from the outlet 3b.

The preheating fuel passage 5b is branched and connected to the cut oxygen passage 5c via the deflagration fuel passage 5d. This makes it possible to supply the fuel gas supplied as the preheating fuel to the cutting oxygen passage. At the branch point, a deflagration fuel valve 4d is attached to control the flow rate, and a deflagration fuel passage 5d is provided with a check valve 7b. Thus, the supply of the fuel gas can be stopped.

The cutting oxygen passage 5c is provided with an ignition pin 6, which is a heat source for ignition, so that high-frequency power can be supplied from a power source (not shown) to perform arc discharge.

The flow of each gas is shown in the fluid system diagram of FIG.
As shown in the figure, the preheating oxygen gas supply means 8a, the preheating fuel gas supply means 8b, and the cutting oxygen supply means 8c respectively have a preheating oxygen valve 9a, a preheating fuel valve 9b, and a cutting oxygen valve 9c to open and close the path. It is supplied into the torch 1 while controlling the flow rate by the valves 4a to 4c. Further, the preheating fuel gas supply means is branched to form a deflagration fuel valve 4d.
And it is connected to the cutting oxygen passage 5c through the deflagration fuel passage 5d. Thus, the deflagration fuel gas is supplied without increasing the supply source of the fuel gas.

When cutting is started using the gas cutting torch 1, first, the preheating oxygen valve 9a and the preheating fuel valve 9b are opened, and the preheating oxygen gas and the preheating fuel gas are supplied to the crater 3, and the preheating flame is supplied. The mixed gas for preheating is ejected from the ejection port 3b. At the same time, the cut oxygen passage 5 is connected via the deflagration fuel passage 5d.
The fuel gas for preheating is supplied to c as the fuel gas for deflagration.

Next, a small amount of the cutting oxygen valve 9c is opened to supply the cutting oxygen gas, and mixed with the above-described deflagration fuel gas in the cutting oxygen passage 5c to generate a deflagration mixed gas. Here, high-frequency power is supplied to the ignition pin 6 to cause arc discharge, and the high heat ignites the deflagration mixed gas, thereby causing the deflagration flame to be ejected from the cut oxygen ejection port 3a.

Then, the mixed gas for preheating which has been ejected from the preheating flame outlet 3b is ignited, and a preheating flame is formed. Since the check valves 7a and 7b are provided in the cut oxygen passage 5c and the deflagration fuel passage 5d, the flame due to the deflagration does not return to the gas supply side.

When the preheating flame is formed, the cutting oxygen valve 9c is fully opened, and the cutting oxygen is ejected. Then, since the pressure difference between the cutting oxygen gas and the preheating fuel gas is large, the check valve 7b operates to close the deflagration fuel passage 5d, and the cutting oxygen passage 5c
The supply of the preheated fuel gas to the fuel cell can be stopped.

Next, a second embodiment of the gas processing torch according to the present invention will be described by taking a gas cutting torch as an example as in the first embodiment. FIG. 5 is a partial sectional view of the gas cutting torch according to the present invention, FIG. 6 is a sectional view taken along line BB in FIG.
Is a front view of the tip of the gas cutting torch, and FIG. 8 is a fluid system diagram according to the second embodiment. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The gas cutting torch 10 shown in FIG. 5 has a head 2 at the tip and a crater 11 attached to the head 2. At the rear end of the torch body 10, a preheating oxygen valve 4a as a preheating oxygen gas supply means, a preheating fuel valve 4b as a preheating fuel gas supply means, and a cutting oxygen valve 4c as a cutting oxygen gas supply means are provided. It is configured such that the flow rate of the corresponding gas can be adjusted.

The preheating oxygen valve 4a is connected to the crater 8 by a preheating oxygen passage 13a.
b is a preheating fuel passage 13b, and the cutting oxygen valve 4c is connected to the crater 11 by a cutting oxygen passage 13c. The preheated oxygen gas and the preheated fuel gas are mixed in the crater 11 and are ejected from a preheated flame outlet 11b shown in FIG.

As shown in FIG. 6, the gas cutting torch 10
On the side of the deflagration oxygen valve is a deflagration oxygen gas supply stage
12a and a deflagration fuel valve 12b, which is a deflagration fuel gas supply means, are provided so that the flow rate of the corresponding gas can be adjusted. The deflagration oxygen gas and the deflagration fuel gas supplied from these valves are both supplied to the deflagration flame passage 13d and mixed to generate a deflagration mixed gas.

The deflagration flame passage 13d is connected to the crater 11, and has a deflagration flame outlet 11c as an opening at the tip of the crater 11. As shown in FIG. 7, the deflagration flame outlet 11c is arranged close to the preheating flame outlet 11b. An ignition heater 14 serving as a heat source for ignition is provided in the middle of the deflagration flame passage 13d.
Is provided, and power is supplied from a power source (not shown) to generate heat and ignite the mixed gas for deflagration in the deflagration flame passage 13d.

FIG. 8 shows a fluid system diagram of this gas. As shown in the figure, the preheating oxygen gas supply means 8a is branched and connected to a preheating oxygen valve 4a and a deflagration oxygen valve 12a via a preheating oxygen valve 9a and a deflagration oxygen valve 16a, respectively. Similarly, the preheating fuel gas supply means 8b branches and is connected to the preheating fuel valve 4b and the deflagration fuel valve 12b via the preheating fuel valve 9b and the deflagration fuel valve 16b, respectively.

As described above, by branching the gas outside the gas cutting torch 7 and making it independent, a solenoid valve can be provided in each gas path, and the opening and closing of the path can be ensured. It is easy to set the flow rate by the valve.

When starting cutting using this gas cutting torch 10, first, the preheating oxygen valve 4a and the preheating fuel valve 4b are opened. Then, the preheated oxygen gas and the preheated fuel gas are mixed in the crater 11 and the preheated flame outlet at the tip of the crater 118 is formed.
From 11b, it becomes a preheating mixed gas and jets out.

Similarly, the deflagration oxygen valve 12a and the deflagration fuel valve 12b are opened and mixed at a predetermined ratio in the deflagration flame passage 13d to generate a deflagration mixed gas. Here, electric power is supplied to the ignition heater 14 to generate heat, and the deflagration flame passage 13 d
By igniting the deflagration mixed gas generated therein, the explosion mixed gas can be explosively burned.

Here, the ignition heater 14 in the deflagration flame passage 13d
By providing the check valve 15 more upstream than the
When the deflagration mixed gas explodes and burns, the deflagration flame passage 13d can be closed, and the flame can be prevented from flowing back to the gas supply source.

When the deflagration flame formed by igniting the deflagration mixed gas is ejected from the deflagration flame ejection port 11c, the preheating mixture gas previously ejected from the preheating flame ejection port 11b is ignited, and a preheating flame is formed. Is done. When the preheat flame is formed, the deflagration oxygen valve 12a and the deflagration fuel valve 12b are closed to stop the supply of the deflagration mixed gas, and the cutting oxygen valve 4c is opened to discharge the cutting oxygen from the cutting oxygen outlet 11a. In this manner, cutting oxygen can be ejected while preheating the cutting material by the preheating flame, and cutting can be performed.

In the second embodiment, the deflagration flame outlet 11c is provided inside the preheating flame outlet 11b.
As shown in FIG. 9 (a), the explosion flame outlet 17
b, and the deflagration flame outlet shown in FIG. 9 (b).
It may be provided in two or more places as in 18.

In the first embodiment, the fuel gas for preheating is used as the fuel gas for deflagration and is diverged in the torch and communicated with the cutting oxygen passage, and the cutting oxygen gas is used as the oxygen gas for deflagration. In the second embodiment, the fuel gas for preheating and the oxygen gas for preheating are branched outside the torch to become the fuel gas for deflagration and the fuel gas for preheating, respectively, and supplied to the deflagration flame passage to be mixed and then detonated. A mixed gas for production was shown.

However, the present invention is not limited to these. For example, a preheating fuel gas and a preheating oxygen gas branched outside the torch are supplied to a cutting oxygen passage to generate a deflagration fuel mixed gas. It is also possible to supply a deflagration fuel gas in which a deflagration fuel gas and a deflagration oxygen gas are mixed in advance.

In the first and second embodiments, the present invention has been described in detail by taking a gas cutting torch as an example. However, the present invention can be applied to a gas welding torch or the like with a similar configuration. .

FIG. 10 is a front view of the tip end of the torch tip of the gas welding torch, and has a welding flame outlet 19 at the center. The gas welding torch shown in FIG. 10 (a) is one in which one deflagration flame passage is formed and an injection port 20 is formed at the tip of the gas welding torch.

The gas welding torch shown in FIG.
The gas welding torch has a double structure, and a ring-shaped deflagration flame outlet 21 is formed concentrically with the welding flame outlet 19.

[0042]

As described above, the gas processing torch according to the present invention can simplify the periphery of the torch by providing the inside of the torch with the ignition device conventionally mounted outside the gas processing torch. . Therefore, the production cost is reduced because the torch for the ignition device is not required, and the capability of the device can be improved because the interval between the torches for gas processing can be reduced.

When applied to a gas cutting torch,
Since the ignition device is always heated to a high temperature due to the heat generated by the cutting, the cooling water that has been sprayed and evaporated does not condense and is always in a dry state. Therefore, it is possible to prevent the ignition from becoming impossible and reduce the adhesion of dirt.

Further, since the relative positions of the deflagration flame outlet and the flame outlet to be ignited such as the preheating flame outlet are fixed,
There is no need to adjust the positional relationship between the pilot crater and the flame outlet. Further, since the amount of the ignition medium is reduced, the ignition rate can be improved.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a gas cutting torch according to a first embodiment.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a front view of the tip of the gas cutting torch.

FIG. 4 is a fluid system diagram.

FIG. 5 is a partial sectional view of a gas cutting torch according to the present invention.

FIG. 6 is a sectional view taken along line BB in FIG.

FIG. 7 is a front view of the tip of the gas cutting torch.

FIG. 8 is a fluid system diagram.

FIG. 9 is a front view of a distal end portion of a gas cutting torch according to another embodiment.

FIG. 10 is a front view of the tip of the gas welding torch when the present invention is applied to the gas welding torch.

FIG. 11 is a diagram illustrating a conventional ignition device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Gas cutting torch 2 ... Head 3 ... Crater 3a ... Cutting oxygen jet 3b ... Preheating flame jet 4a ... Preheating oxygen valve 4b ... Preheating fuel valve 4c ... Cutting oxygen valve 4d ... Explosive fuel valve 5a ... Preheating oxygen passage 5b ... preheating fuel passage 5c ... cutting oxygen passage 5d ... deflagration fuel passage 6 ... ignition pin 7 ... gas cutting torch 7a ... check valve 7b ... check valve 8 ... crater 8a ... preheating oxygen gas supply means 8b ... preheating flame outlet 8b ... preheating fuel gas supply means 8c ... cutting oxygen supply means 9a ... preheating oxygen valve 9b ... preheating fuel valve 9c ... cutting oxygen valve 10 ... gas cutting torch 10 ... torch body 11 ... crater 118 ... crater 11a ... cutting oxygen jet 11b ... Preheat flame outlet 11c Deflagration flame outlet 12a Deflagration oxygen valve 12b Deflagration fuel valve 13a Preheating oxygen passage 13b Preheating fuel passage 13c Cutting oxygen passage 13d: deflagration flame passage 14: ignition heater 15: check valve 16a: deflagration oxygen valve 16b: deflagration fuel valve 17: deflagration flame jet 18: deflagration flame jet 19: welding flame jet 20: deflagration flame jet 21 Explosive flame spout

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B23K 7/10 F23D 14/38 F23Q 3/00 102

Claims (6)

(57) [Claims] 1. A deflagration fuel gas and a deflagration oxygen gas are supplied to a gas processing torch, and the deflagration fuel gas and the deflagration oxygen gas are mixed inside the gas processing torch to form a deflagration gas mixture. A deflagration gas is generated or supplied to a gas processing torch with a premixed deflagration gas, and a deflagration flame is formed by igniting the deflagration mixture gas inside the gas processing torch. A method for igniting a gas processing torch, characterized by igniting a gas processing torch. 2. A gas processing torch for supplying a fuel gas and an oxygen gas to generate a flame and process a workpiece, comprising: a deflagration fuel gas supply means for supplying a deflagration fuel gas; A deflagration oxygen gas supply means for supplying gas; a deflagration fuel passage having an opening at a tip of a torch; a deflagration flame passage having an opening at a torch tip by mixing the deflagration fuel gas and the deflagration oxygen gas; A torch for gas processing, comprising: a heat source for ignition disposed in a flame passage. 3. A gas processing torch for supplying fuel gas and oxygen gas to generate a flame and performing cutting, welding, etc., wherein a deflagration fuel gas and a deflagration oxygen gas are mixed in advance. It has a deflagration fuel gas supply means for supplying gas, a deflagration flame passage which is supplied with the deflagration fuel gas and has an opening at the tip of a torch, and an ignition heat source arranged in the deflagration flame passage. Torch for gas processing. 4. The gas processing torch is a gas cutting torch, and a cutting oxygen gas supply means for supplying a cutting oxygen gas, and a cutting oxygen gas having an opening at the tip of the torch while allowing the cutting oxygen gas to pass therethrough. A passage, a preheating fuel gas supply means for supplying a preheating fuel gas, a preheating oxygen gas supply means for supplying a preheating oxygen gas, and a preheating fuel gas mixed with the preheating oxygen gas. A preheating mixed gas generating means for generating a mixed gas, and a preheating flame outlet provided at the tip of the torch for jetting the preheating mixed gas; and the deflagration oxygen gas supply means includes the cutting oxygen gas. The gas processing torch according to claim 2 or 3, which is a supply unit or the preheating oxygen gas supply unit. 5. The gas processing torch is a gas cutting torch, a cutting oxygen gas supply means for supplying a cutting oxygen gas, and a cutting oxygen gas having an opening at the tip of the torch while allowing the cutting oxygen gas to pass therethrough. A passage, a preheating fuel gas supply means for supplying a preheating fuel gas, a preheating oxygen gas supply means for supplying a preheating oxygen gas, and a preheating fuel gas mixed with the preheating oxygen gas. A preheating mixed gas generating means for generating a mixed gas; and a preheating flame outlet provided at the tip of the torch for jetting the preheating mixed gas, wherein the deflagration oxygen gas supply means includes the preheating fuel. 3. A gas supply means.
A torch for gas processing according to any one of claims 1 to 4. 6. The gas processing torch, wherein the deflagration flame passage is the cutting oxygen passage, and the opening of the deflagration flame passage is an opening of the cutting oxygen passage. A torch for gas processing according to claim 4.