JPH0924464A - Gas cutting torch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To satisfy functions required for a gas cutting torch, to reduce the peripheral piping as much as possible for the improvement of maintenance and also to lighten a mechanical load on the torch body. SOLUTION: The torch is provided with a head member B in which a part 3 is formed for attaching a nozzle 2 at the tip end and in which plural gas flow passages 6a-6c are formed, and an attachment C in which a hole 10 is formed for inserting the head member B and in which one or more members are selectively arranged from a pilot flame forming member D, water spray member E, flam extingushment detecting member F and height detecting member G; and the head member B and the attachment C are fixed by inserting the head member through the hole 10 of the attachment. The head member is formed with gas flow passages 6d, 6e for forming a pilot flame and a passage 8 for feeding water, with these passages opened to the outer circumferential surface. The hole 10 of the attachment C is formed with grooves 18a, 18b, 19 oppositely facing the openings of the passages.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas cutting torch equipped with an attachment in which a pilot flame forming member, a water sprinkling member, a misfire detecting member and a height detecting member are selectively arranged.

[0002]

2. Description of the Related Art A cutting device for cutting a steel sheet in a straight line or a cutting device for cutting a die is generally constructed by attaching a plurality of gas cutting torches to a garter. In such a cutting device, various functions are selectively added for the purpose of labor saving of cutting work, prevention of damage of the gas cutting torch, and improvement of quality.

For example, for the purpose of labor saving work, an ignition nozzle is arranged for each gas cutting torch, a pilot flame is formed in advance at the ignition nozzle when starting the cutting work, and the ignition nozzle is mounted on the gas cutting torch. By injecting a mixed gas of fuel gas and oxygen gas from the crater, flames can be simultaneously formed in a plurality of gas cutting torches. Similarly, a sensor for detecting misfire is arranged for each gas cutting torch, and it is possible to detect whether a flame is formed at the crater and / or whether cutting is performed to prevent the occurrence of defective cutting. Is configured as follows.

Further, the gas cutting torch has a water spray nozzle for spraying water around the gas cutting torch in order to prevent the influence of heat generated by a flame or heat generated by combustion of a base metal, and a cut target of the gas cutting torch. A sensor for detecting the height from the material to be cut is arranged in order to maintain the distance from the material at a constant value.

Although each of the above nozzles and sensors may be individually arranged in the gas cutting torch, a plurality of nozzles and sensors are usually arranged to perform cutting on the material to be cut and to cut the material from the gas cutting torch. The height of is monitored comprehensively.

[0006]

Each of the above nozzles and sensors has independent functions such as flame ignition, water spray, flame monitoring, and height monitoring, and is directly fixed to the gas cutting torch. Therefore, if you try to add various functions for the purpose of labor saving of cutting work, prevention of damage of gas cutting torch, or improvement of quality, the gas cutting torch has nozzles and sensors according to the intended function. Since it will be attached, complicated piping and wiring will be performed around the torch. As a result, maintenance work becomes complicated, and the mechanical load on the main body of the gas cutting torch increases.

An object of the present invention is to attach an attachment selectively arranging each of the above-mentioned functions to a gas cutting torch so as to reduce the piping around the torch as much as possible to improve the maintainability. Another object of the present invention is to provide a gas cutting torch with a reduced mechanical load on the gas cutting torch body.

[0008]

In order to solve the above-mentioned problems, a gas cutting torch according to the present invention has a mounting portion for mounting a gas cutting crater at its tip and is connected to a gas distribution portion provided in the mounting portion. Which forms a pilot flame that forms a plurality of gas flow passages and a hole that inserts through the head member, and forms a pilot flame that ignites a mixed gas of fuel gas and oxygen gas flowing out from the gas cutting crater. It consists of a flame forming member, a water sprinkling member that sprays water near the cutting site, a misfire detecting member that detects the presence or absence of preheating flame at the gas cutting crater, and a height detecting member that detects the distance from the material to be cut. An attachment in which one or a plurality of members are selectively arranged from the inside, and an instrument head member is inserted into a hole of the attachment to fix them.

In the above gas cutting torch, the head member has a gas supply passage and / or a water supply passage different from the gas flow passage connected to the gas distributor provided in the mounting portion of the head member. A gas supply path and / or a water supply path are opened to the outer peripheral surface of the vessel head member, and the attachment has a pilot flame forming member and / or a water sprinkling member, and the inner peripheral surface of the hole is the vessel head. It is preferable to have a gas passage and / or a water passage connected to the pilot flame forming member and / or the water sprinkling member at a position corresponding to the gas supply passage and / or the water supply passage opened on the outer peripheral surface of the member.

In the above gas cutting torch (hereinafter simply referred to as "torch"), a mounting portion for mounting a gas cutting crater (hereinafter simply referred to as "crater") is formed, and a gas distributor provided in the mounting portion. Since it has a vessel head member that forms a plurality of gas flow passages connected with, by attaching a crater to the mounting portion of this vessel head member and supplying fuel gas and supporting gas from the gas distribution portion to the crater, It is possible to cut the material to be cut by forming a flame for preheating at the crater and jetting cutting oxygen.

Further, a pilot flame forming member for forming a pilot flame for igniting a mixed gas of fuel gas and oxygen gas flowing out from the crater, a sprinkling member for spraying water in the vicinity of the cutting site, and the presence or absence of preheating flame at the crater are checked. A single structure having one or more functions by selectively disposing one or more members from among a member consisting of a misfire detecting member for detecting and a height detecting member for detecting a distance from a material to be cut. A torch having one or a plurality of functions can be formed by forming the attachment of FIG. 2 and inserting the instrument head member into the hole formed in the attachment to fix them. Therefore, the structure around the torch is simplified,
The workability of maintenance can be improved.

Further, the head member has a gas supply passage or a water supply passage different from the gas flow passage connected to the gas distribution portion provided in the mounting portion of the equipment head member, and the gas supply passage and the water supply passage are provided. Is formed by opening the outer peripheral surface of the device head member, and further, the attachment has a pilot flame forming member or a water sprinkling member,
When a pilot flame forming member, a gas passage connected to a water sprinkling member, and a water passage are formed on the inner peripheral surface of the hole and on the outer peripheral surface of the vessel head member, at positions corresponding to the water supply passage Can add a pilot flame formation or water spray function without exposing any special piping around the torch.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the torch will be described below with reference to the drawings. FIG. 1 is a side view of a torch having a pilot flame forming function, FIG. 2 is a view showing a relationship between an instrument head member and an attachment in the torch of FIG. 1, and FIG. 3 is a side view of a torch having all functional members. Is.

The torch A shown in the figure comprises a head member B and an attachment C, and the attachment C has one or more functions selected from a pilot flame forming member, a water spraying member, a misfire detecting member and a height detecting member. Members are arranged, and the device head member B and the attachment C are configured to be removable. Therefore, it is possible to configure the torch A having a desired function by selecting the attachment C that can correspond to the function required by the cutting device and mounting it on the torch body B.

The device head member B is made of a solid round bar having a length corresponding to the size of the attachment C, and is inserted into the pipe-shaped torch body 1 and attached to the tip of the body 1. As shown in FIG. 2A, the device head member B is
A mounting portion 3 for mounting the crater 2 by fixing the crater 2 with a nut 3a is formed, and a taper for continuously supplying fuel gas, combustion-supporting gas (preheating oxygen), and cutting oxygen to the crater 2 in a continuous manner. The distribution unit 4 is formed by the sheet-shaped sheet portion 4a and the groove-shaped supply portion 4b.

A valve 5a for fuel gas, a valve 5b for preheated oxygen, and a valve 5c for cutting oxygen are provided at the rear end of the torch body 1, and start and stop of supply of the corresponding gas,
And the flow rate can be adjusted. These valves 5a to 5c and the device head member B are connected by a pipe (not shown), and the pipes connected to the device head member B and the supply unit 4b of the distributor 4 are connected via a plurality of gas flow passages 6a to 6c. It is connected.

Therefore, by opening the valves 5a and 5b and supplying the fuel gas and the preheated oxygen to the crater 2, it is possible to form a flame at the crater 2 and preheat a material not shown, Moreover, by opening the valve 5c, it is possible to inject cutting oxygen from the crater 2 to cut the material to be cut.

The attachment C comprises one or a plurality of members selected from the pilot flame forming member D, the sprinkling member E, the misfire detecting member F, and the height detecting member G. A hole 10 through which the device head member B is inserted is formed at a predetermined position of the attachment C, and after being attached to the device head member B through the hole 10, the torch A is constructed by fastening with a nut 7.

The attachment C provided with the pilot flame forming member D will be described below with reference to FIG.

The pilot flame forming member D has a function of igniting a mixed gas of fuel gas and preheated oxygen ejected from the crater 2, and has a pilot nozzle 11 and an injector.
12 and a spark member 13.

A housing hole 14 for housing the injector 12 is formed in the attachment C, and a mounting portion 15 for mounting the pilot nozzle 11 is formed continuously with the housing hole 14. A flow passage 16a for supplying a fuel gas for forming a pilot flame is opened in the accommodation hole 14, and the injector 12
The oxygen gas injected from the oxygen hole 12a formed so as to coincide with the axis of the
Mix inside 14 and mix this gas into pilot nozzle 11
It is designed to be able to squirt from.

As the spark member 13, a known device for applying a high voltage to discharge is used. The transformer is housed in a hole (not shown) formed in the attachment C, and the wire 17 for energizing the transformer has an upper surface side of the attachment C. Is derived from.

In the above structure, the oxygen supplied to the oxygen hole 12a of the injector 12 and the fuel gas supplied to the accommodation hole 14 may be connected via the upper surface of the attachment C.
However, in this case, a pipe or hose for supplying oxygen gas and fuel gas is exposed along the torch body 1 and the circumference of the torch A becomes complicated.

Therefore, a pipe for supplying oxygen and fuel gas for forming a pilot flame is arranged inside the torch body 1 and is connected to the device head member B, and the injector is connected via the device head member B and the attachment C. 12, it is preferable to supply oxygen and fuel gas to the receiving hole 14. Similarly, in the attachment C provided with the water sprinkling member E, a pipe for supplying water is arranged inside the torch body 1 and connected to the device head member B to connect the device head member B.
And it is preferable to supply to the watering nozzle 20 via the attachment C.

For this reason, the gas flow passage 6d for supplying the fuel gas for forming the pilot flame to the vessel head member B at a position different from the gas flow passages 6a to 6c connected to the distributor 4 is provided.
And a gas supply path 6e for supplying oxygen is formed.
These gas supply paths 6d and 6e open at different positions on the outer peripheral surface of the device head member B. Similarly, a water channel 8 that opens to the outer peripheral surface is formed in the device head member B.

The gas flow passages 6d and 6e are connected to the tubes 9a and 9b arranged inside the torch body 1, and are connected to a fuel gas supply source and an oxygen supply source (not shown) provided outside the torch A, The flow path 8 is connected to a water supply source via a pipe (not shown) arranged inside the torch body 1.

The gas flow passage 6 is not necessarily provided in the device head member B.
It is not necessary to form both d, 6e and the water flow path 8,
It may be formed depending on whether the functional member disposed on the attachment C is both the pilot forming member D and the sprinkling member E or only one of them.

The gas flow passage 6 opened on the inner peripheral surface of the hole 10 formed in the attachment C and on the outer peripheral surface of the device head member B.
Annular grooves 18a and 18b are formed at positions facing d and 6e, respectively. The groove 18a allows the fuel gas to flow therethrough, and is connected to the flow passage 16a opened in the accommodation hole 14.
Further, the groove 18b allows oxygen to flow therethrough, and the flow passage 16b is provided.
Oxygen hole of injector 12 housed in housing hole 14 via
It is connected to 12a.

Similarly, the holes 10 formed in the attachment C
The inner peripheral surface of the flow path 8 that is open to the outer peripheral surface of the device head member B
A groove 19 is formed at a position opposite to the groove 19. The groove 19 is connected to a water spray nozzle 20 constituting a water spray member E via a flow path (not shown) formed in the attachment C.

With the torch A constructed as described above, when the fuel gas and the preheated oxygen are supplied to the crater 2, it is possible to automatically ignite the mixed gas injected by the pilot nozzle 11.

That is, if fuel gas and oxygen are supplied from the pipes 9a and 9b prior to supplying each gas to the crater 2,
These gases are stored in the attachment hole 14 of the attachment C.
The mixture is mixed inside and is injected from the pilot nozzle 11. At the same time, when the wire 17 is energized, it is discharged at the tip of the spark member 13, and the spark forms a pilot flame. Then, when the mixed gas of the fuel gas and the preheated oxygen is injected from the crater 2, the injected mixed gas is ignited by the pilot flame to form the preheated flame. After forming a preheating flame in crater 2,
It is possible to extinguish the pilot flame by stopping the supply of pilot fuel gas and oxygen.

Next, a torch A having an attachment C in which all functional members such as the pilot flame forming member D, the sprinkling member E, the misfire detecting member F, and the height detecting member G are arranged will be described with reference to FIG.

The gas flow passages 6a to 6e and the water flow passage 8 are formed in the device head member B, and the gas flow passage 6 for pilots is used.
The d, 6e and the flow path 8 are open to the outer peripheral surface. In addition, the hole 10 formed in the attachment C has grooves 18a, 18
b and 19, gas flow passages 6d and 6e, and flow passage 8 are formed.
Is in communication with

The sprinkling member E is a ring-shaped sprinkling nozzle 20.
And a pipe that connects the watering nozzle 20 and the attachment C
21 and the end of the pipe 21 has an attachment C
It is connected to the flow path communicated with the flow path 8 formed in the above, and is fixed to the attachment C by the nut 22.

Therefore, when water is supplied to a water pipe (not shown) arranged inside the torch body 1, the supplied water passes from the flow path 8 of the vessel head member B to the pipe 21 via the groove 19 of the attachment C. It is distributed and sprayed from the spray nozzle 20.

The misfire detecting member F is an infrared sensor 23 for monitoring the temperature on the extension line of the pilot nozzle 11 and the crater 2.
And a support member 24 that supports the infrared sensor 23, and the end portion of the support member 24 can be fixed to the attachment C by the nut 22.

A line 25 for transmitting and receiving signals to and from the infrared sensor 23
Is connected. This line 25 may be exposed to high temperature by the pilot flame or the flame in which the crater 2 is formed.
Therefore, the supporting member 24 is formed of a pipe, a through hole is formed in the attachment portion of the nut 22 of the attachment C, and the wire 25 is inserted into the supporting member 24 and the through hole to protect the wire 25. preferable. Also infrared sensor 23
When supporting the support member 24, an infrared sensor
It is preferable to configure 23 so that it can be set in a desired posture.

The height detecting member G has a capacitive sensor 26 for detecting the electric capacitance between the surface of the material to be cut and a supporting member 27 for supporting the capacitive sensor 26.
The end portion of is attached to the attachment C by a nut 22. A line 28 for transmitting and receiving a signal is connected to the capacitive sensor 26, and the line 28 may be exposed to a pilot flame or a flame formed in the crater 2. Therefore, by forming the support member 27 with a pipe, forming a through hole in the attachment portion of the nut 22 of the attachment C, and inserting the wire 28 into the support member 27 and the through hole,
It is preferred to protect the line 28.

In the torch A having the attachment C configured as described above, ignition of the mixed gas injected from the crater 2, presence / absence of flame in the crater 2 and presence / absence of pilot flame, and cutting of the crater 2 at the time of cutting It is possible to sprinkle the height from the material surface and the cutting site.
Therefore, by attaching the attachment C, which is a single member, to the torch body 1 and the device head member B, the torch A having a desired function can be configured.

In the above-described embodiment, the case where the pilot flame forming member D is arranged on the attachment C, the case where the pilot flame forming member D, the sprinkling member E, the misfire detecting member F,
Although the case where the height detection member G is provided has been described, it goes without saying that the present invention is not limited to these embodiments. That is, it is possible to configure the attachment C by selecting one or a plurality of functional members from each of the functional members based on the function required of the cutting machine equipped with the torch A.

In particular, an attachment C having one or a plurality of different functional members arranged therein is prepared in advance, and the attachment C corresponding to the purpose of cutting is appropriately replaced with the device head member B.
It is also possible to use by attaching to.

[0042]

As described in detail above, in the torch according to the present invention, the attachment made of a single material has one or more members selected from a pilot forming member, a sprinkling member, a misfire detecting member, and a height detecting member. Arrange multiple functional members,
Since this attachment is inserted through the device head member and fixed to each other, the structure around the torch can be simplified and the maintenance work can be easily performed.

In particular, when a flow passage for fuel gas or oxygen gas for forming a pilot flame or a flow passage for water is formed in the head member, it is not necessary to provide a pipe around the torch, and the number is smaller. It has features such as a simple structure with members.

[Brief description of drawings]

FIG. 1 is a side view of a torch having a pilot flame forming function.

FIG. 2 is a view showing a relationship between a device head member and an attachment in the torch of FIG.

FIG. 3 is a side view of a torch having all functional members.

[Explanation of symbols]

 A torch B device head member C attachment D pilot flame forming member E water sprinkling member F misfire detection member G height detection member 1 torch body 2 crater 3 mounting part 4 distribution part 5a-5c valve 6a-6e gas flow passage 7,22 nut 8 Water Channel 10 Hole 11 Pilot Nozzle 12 Injector 13 Spark Member 14 Storage Hole 15 Mounting Portion 16a, 16b Flow Path 17, 25, 28 Wire 18a, 18b, 19 Groove 20 Sprinkling Nozzle 21 Pipe 23 Infrared Sensor 24, 27 Support member 26 Capacitive sensor

Claims (2)

[Claims] 1. A device head member having a mounting portion for mounting a gas cutting crater at its tip and a plurality of gas flow passages connecting to a gas distribution unit provided in the mounting member, and the device head member inserted therethrough. A pilot flame forming member that forms a pilot flame that ignites a mixed gas of fuel gas and oxygen gas that flows out from the gas cutting crater, a sprinkling member that sprays water near the cutting site, and a gas cutting crater. A misfire detection member for detecting the presence or absence of preheating flame in the attachment, and an attachment in which one or a plurality of members are selectively arranged from a member including a height detection member for detecting a distance from a material to be cut, A gas cutting torch, characterized in that an instrument head member is inserted into a hole of the attachment to fix the both members. 2. The gas supply passage and / or the water supply passage different from the gas flow passage in which the device head member is connected to the gas distribution unit provided in the mounting portion of the device head member. Alternatively, the water supply passage is configured to be opened to the outer peripheral surface of the device head member, and the attachment has a pilot flame forming member and / or a water sprinkling member, and is an inner peripheral surface of the hole, and the outer peripheral surface of the device head member. The gas cutting according to claim 1, further comprising a gas passage and / or a water passage connected to the pilot flame forming member and / or the water sprinkling member at a position corresponding to the opened gas supply passage and / or water supply passage. torch.