JPH0329009Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to an oxygen cutting device for cutting and drilling metal, concrete, etc. by passing oxygen into a steel pipe containing an auxiliary wire. This invention relates to a lance for oxygen cutting and drilling that can be made entirely flexible.

[Conventional technology]

In general, methods for perforating steel plates, etc., include the gas cutting method using a gas burner, the generation of an arc between the metal base material and the cutting electrode, and the metal being heated by the generated arc heat. An arc cutting method is used in which the material is fused and fused. When drilling holes in steel plates, etc., in a factory or the like with equipment, either a gas cutting method or an arc cutting method can be used depending on the purpose. However, when cutting or drilling steel plates, concrete, etc. at work sites such as underground mining sites, steel plate installation sites, etc., there may be times when it is not possible to use arc cutting due to unavailability or power failure. There are many conditions where it is not possible to use either the gas cutting method or the arc cutting method. Oxygen cutting is the most suitable cutting method for locations with such conditions. This oxygen cutting method includes an oxygen spear method and an oxygen arc cutting method.

The oxygen spear method involves inserting a linear combustion aid into a steel tube, passing oxygen through between the combustion aids, and causing an oxidation reaction between the combustion aid and oxygen at the tip of the steel tube. This oxygen lance cutting machine uses heat to cut and drill steel plates, concrete, etc., and the configuration of this oxygen lance cutting machine is shown in Figure 8. That is, in the figure, an oxygen lance cutting machine 100 has a torch 110, and a lance 120 is detachably attached to the tip of the torch 110. Further, an oxygen hose 140 is connected to the rear end of the torch 110 via an oxygen regulating valve 130. This oxygen hose 14
The other end of 0 is connected to an oxygen gauge 150. This oxygen gauge 150 is connected to an oxygen cylinder 160.
installed on. The oxygen lance cutting machine 100 configured in this manner adjusts the amount of oxygen supplied from the oxygen cylinder 160 via the oxygen hose 140 with the oxygen control valve 130 to control the torch 11.
0 is supplied to the lance 120 attached to the 0.
The oxygen supplied to this lance 120 is
An oxidation reaction occurs between the auxiliary wire inserted in the lance 20 and the tip of the lance 120, generating oxidation heat. The oxidation reaction heat at the tip of the lance 120 cuts the base material 300 such as steel plate, concrete, etc.
Perform drilling etc. The lance 120 detachably attached to the tip of the torch 110 is conventionally
It has a configuration as shown in FIGS. 9, 10, and 11. The lance 120 shown in FIG. 9 is constructed by inserting a plurality of auxiliary wires 1202 made of iron, aluminum, etc. into a cylindrical steel pipe 1201. Therefore, there is a gap 1203 between the steel pipe 1201 and the auxiliary wire 1202, and a gap 120 between the wires of the auxiliary wire 1202.
4 are formed respectively. This void 120
3, 1204, the oxygen cylinder 160 shown in FIG.
Oxygen for cutting and drilling and oxygen for auxiliary combustion are supplied from Further, in the lance 120 shown in FIG. 10, a steel inner tube 1213 having a cylindrical shape is provided inside a steel outer tube 1211 having a cylindrical shape. This steel outer tube 12
A plurality of auxiliary combustion wires 1212 made of iron, aluminum, etc. are inserted between the inner tube 1213 and the steel inner tube 1213. Therefore, this steel inner tube 12
13 is arranged inside the auxiliary combustion line 1212. Inside this steel inner tube 1213,
A space 1214 is formed, and this space 12
14 is supplied with oxygen for cutting and drilling and oxygen for auxiliary combustion, which are supplied from an oxygen cylinder 160 shown in FIG. In addition, the lance 120 shown in FIG.
A plurality of auxiliary wires 122 made of iron, aluminum, etc. are placed in a cylindrical steel pipe 1221.
2 is inscribed in the inner wall surface of the steel pipe 1221 and arranged in a ring shape. Therefore, there is a gap between the steel pipe 1221 and the auxiliary wire 1222.
Moreover, a space is formed in the center of each of the auxiliary combustion wires 1222 arranged in a ring shape. This gap serves as an auxiliary combustion oxygen hole 1223 that supplies auxiliary combustion oxygen supplied from the oxygen cylinder 160 shown in FIG.
Also, the space is the oxygen cylinder 160 shown in FIG.
Oxygen holes 1224 for cutting and drilling are respectively configured to supply oxygen for cutting and drilling.

In addition, in the oxygen arc cutting method, oxygen is ejected from the tip of the steel tube, and at the same time an arc is generated between the steel plate, etc., which is the material to be cut or perforated, and the tip of the steel tube, and the heat generated by the arc is The oxygen arc cutting machine cuts and perforates steel plates etc. using the heat of reaction between oxygen and the steel plate as the material to be cut, and the configuration of an oxygen arc cutting machine using this oxygen arc cutting method is shown in FIG. That is, in the figure, oxygen arc cutting machine 2
00 has a torch 210, and a lance 230, which is an electrode rod for oxygen arc cutting and drilling, is supported by a holder 220 and detachably attached to the tip of the torch 210. Further, a cord 290 and an oxygen hose 250 are connected to the rear end of the torch 210. This oxygen hose 250
An oxygen hose 250 is connected to the other end via an oxygen control valve 240. The other end of this oxygen hose 250 is connected to an oxygen gauge 260. This oxygen gauge 260 is connected to the oxygen cylinder 27
It is attached to 0. In addition, the code 290
is connected to the (-) terminal of the DC welding machine 280. A base material 300, which is a material to be cut such as a steel plate, is connected to the (+) terminal of the DC welding machine 280 via a cord 295. The oxygen arc cutting machine 200 configured in this manner has a lance 230 attached to the torch 210 that adjusts the amount of oxygen supplied from the oxygen cylinder 270 via the oxygen hose 250 with the oxygen control valve 240.
supply to. A voltage is applied between the lance 230 and the base material 300 to cause arc discharge, and the oxygen supplied to the lance 230 is injected from the tip of the lance 230. As a result, arc heat is generated by arc discharge, and at the same time, at the tip of the lance 230, an oxidation reaction occurs between the oxygen supplied to the lance 230 and the steel plate that is the material to be cut, and oxidation heat is generated. to occur. The arc heat and oxidation reaction heat at the tip of the lance 230 cause the base material 300 to
Cutting, drilling, etc. A lance 230 is detachably attached to the tip of this torch 210.
has conventionally had a configuration as shown in FIGS. 13 and 14. The lance 230 shown in FIG. 13 has iron, iron,
A plurality of auxiliary combustion wires 2322 made of aluminum or the like are inscribed in the inner wall surface of a steel pipe 2331 and arranged in a ring shape, and the steel pipe 2331 is covered with a covering material 2335. Therefore, between the steel pipe 2331 and the auxiliary wire 2332,
The void is also arranged in a ring-like auxiliary wire 23.
A space is formed in the center of 32, respectively. This void is the oxygen cylinder 270 shown in FIG.
The oxygen hole 2333 for auxiliary combustion supplies the oxygen for auxiliary combustion supplied from the oxygen tank 2333, and the oxygen hole 2334 for cutting and drilling supplies the oxygen for cutting and drilling supplied from the oxygen cylinder 270 shown in FIG. are composed of each. Furthermore, the lance 230 shown in FIG. 14 is used when the diameter of the lance is small, such as an electrode rod for oxygen arc cutting and perforation. The auxiliary combustion line as shown in Fig. 11 and Fig. 13 is
This steel pipe 2310 is not inserted, but is constructed by covering the steel pipe 2310 with a covering material 2311. Therefore, the lance 230 shown in FIG.
It is used by supplying oxygen to 310.

[Problem that the invention attempts to solve]

In this type of oxygen cutting method, arc heat and oxidation reaction heat are generated at the tip of the lance, and the tip of the lance is sequentially burned and consumed by the heat and oxidation reaction, reducing the overall length of the lance. , gradually becoming shorter. Conventional lances for oxygen cutting and drilling, which are subject to sequential combustion and wear and tear, are made by cutting the entire length of the lance to a fixed length (approximately 2 to 3 m) using a hard steel pipe. Therefore, conventional lances for oxygen cutting and drilling are made of hard steel pipes of a fixed length (approximately 2
Use a single lance cut to ~3m), or
Or it is used as a two piece joint. For this reason, as the lance was being used, the tip of the lance would gradually burn out and wear out, and once the specified length had been used, a new lance would be attached to the torch.

Therefore, in the conventional oxygen cutting method, it is necessary to stop the work and replace the lance on the torch after every fixed length of the lance, and it takes a lot of time to replace the lance, especially when working underwater. The problem is that the work efficiency is extremely low.

[Means for solving problems]

This invention generates arc heat and oxidation reaction heat at the tip of the lance, and even if the tip of the lance is gradually burned and worn out due to this heat and oxidation reaction, the lance can be replaced on the torch like in the past. It is capable of continuously supplying lances without the need for supply.
A lance for oxygen cutting and perforation used in an oxygen cutting device that cuts and perforates metal, concrete, etc. by passing oxygen into a steel pipe placed in an auxiliary wire, in which a ring-shaped or spiral corrugation process is applied to the steel pipe constituting the lance. In addition, this is the above-mentioned auxiliary wire with a twist added to it.

〔Example〕

FIG. 4 shows the configuration of an embodiment using the lance of the present invention. In the figure, an oxygen lance cutting machine 400 has a guide 410 through which a lance 420 passes. The lance 420 is wound around a drum 470, and can be freely let out from the drum 470, which is rotatably hung on a stand 480. One end of the lance 420 is connected to an oxygen hose 490 through a rotary joint (not shown) through the axes of the drum 470 and the stand 480, and has a structure that allows oxygen to be supplied to the lance 420 while freely rotating the drum 470. It's getting old. The other end of the oxygen hose 490 is connected to a constant flow supply device 430 at hand.
This constant flow supply device 430 is an oxygen cylinder 460.
is connected via an oxygen gauge 450 and an oxygen hose 440.

The lance cutting machine 400 configured in this way is
Oxygen hose 440 supplies oxygen from oxygen cylinder 460;
It is supplied to the lance 420 via a constant flow supply device 430, an oxygen hose 490, a rotary joint, etc. The oxygen supplied to this lance 420 is
An oxidation reaction occurs between the auxiliary wire inserted into the lance 420, the lance 420, the base material 300, and the tip of the lance 420 to generate oxidation heat. The heat of the oxidation reaction is used to cut and drill holes in the base material 300, such as a steel plate or concrete.

Examples of the present invention will be described below.

FIG. 1 shows a first embodiment of the invention. This embodiment corresponds to the conventional example shown in FIG.

In the figure, a lance 420 is constructed by twisting and inserting a plurality of auxiliary combustion wires 3 made of iron, aluminum, etc. into a cylindrical steel pipe 1. A ring-shaped corrugate 2 is formed on this steel pipe 1, and the steel pipe 1 is configured to have flexibility as a whole. This steel pipe 1 may be a spiral corrugate instead of the ring-shaped corrugate 2. That is, the steel pipe 1 only needs to be corrugated. Therefore, a gap 4 is formed between the steel pipe 1 and the auxiliary wire 3, and a gap 5 is formed between the wires of the auxiliary wire 3. These gaps 4 and 5 are supplied with oxygen for cutting and drilling and oxygen for auxiliary combustion, which are supplied from an oxygen cylinder 460 shown in FIG.

FIG. 2 shows a second embodiment of the invention. This embodiment corresponds to the conventional example shown in FIG.

In the figure, a lance 420 includes a steel inner tube 6 having a cylindrical shape inside a steel outer tube 1 having a cylindrical shape. The steel outer tube 1 and the steel inner tube 6 include a ring-shaped corrugate 2,
7 is formed, and is configured to have flexibility as a whole. The steel pipe 1 and the steel inner pipe 6 may be spiral corrugates instead of ring-shaped corrugates 2 and 7. That is, the steel pipe 1 and the steel inner pipe 6 may be corrugated. This steel outer tube 1 and steel inner tube 6
Multiple auxiliary wires 3 made of iron, aluminum, etc.
It is constructed by twisting and inserting. Therefore, this steel inner tube 6 is arranged inside the auxiliary combustion wire 3. A space 8 is formed inside this steel inner tube 6, and oxygen for cutting and drilling and oxygen for auxiliary combustion are supplied to this space 8 from an oxygen cylinder 460 shown in FIG. .

FIG. 3 shows a third embodiment of the invention. This embodiment corresponds to the conventional example shown in FIG.

In the figure, a lance 420 includes a plurality of twisted auxiliary wires 3 made of iron, aluminum, etc., inserted into a cylindrical steel pipe 1.
It is arranged in a ring shape inscribed on the inner wall surface of the. A ring-shaped corrugate 2 is formed on this steel pipe 1, and the steel pipe 1 is configured to have flexibility as a whole. This steel pipe 1 may be a spiral corrugate instead of the ring-shaped corrugate 2. That is, the steel pipe 1 only needs to be corrugated. Therefore,
A gap is formed between the steel pipe 1 and the auxiliary wire 3, and a space is formed in the center of the auxiliary wire 3 arranged in a ring shape. This gap serves as the auxiliary combustion oxygen hole 4 that supplies oxygen for auxiliary combustion supplied from the oxygen cylinder 460 shown in FIG.
Oxygen holes 9 for cutting and drilling each supply oxygen for drilling.

FIG. 7 shows the configuration of an oxygen arc cutting machine using the lance of the present invention. In the figure, oxygen lance cutting machine 5
00 is an oxygen amount and arc current regulator 540 and a lance 520 which is an electrode rod for oxygen arc cutting and perforation.
It has a guide 510 that supports and sends out the. The lance 520 is wound around a drum 550, and the drum 5 is rotatably hung on a stand 555.
You can freely draw from 50. Lance 5
20 has a drum 550 and a stand 55 at one end.
The lance 520 is connected to the oxygen hose 590 through a rotary joint (not shown) through the axis of the drum 550.
The structure is such that it can supply oxygen to the body. Also,
The other end of oxygen hose 590 is connected to oxygen gauge 560 via flow regulator 540. Also, the end of the lance 520 on the drum side is connected to the drum 550.
and is connected to the cord 545 via a slip ring (not shown) attached to the stand 555. This code 545 is for DC welding machine 580
The (-) terminal is connected to the (-) terminal, and the (+) terminal is cut through a cord 595 to a base material 300 that is a material to be cut, such as a steel plate. Further, an arc current regulator 540 between the lance 520, which is an electrode rod for oxygen arc cutting and drilling, and the drilling material 300 to be cut, is connected to a DC welding machine 580 via a cord 575. Further, a voltage is applied between the lance 520 and the base material 300 to cause arc discharge, and the oxygen supplied to the lance 520 is injected from the tip of the lance 520. As a result, arc heat is generated by arc discharge, and at the same time,
At the tip of the lance 520, an oxidation reaction occurs between the oxygen supplied to the lance 520 and the steel plate, which is the material to be cut, to generate oxidation heat. This Lance 520
Cutting, perforation, etc. of the base material 300 are performed by arc heat and oxidation reaction heat at the tip of the base material 300. This guide 51
Lance 5 is removably attached to the tip of 0.
20 has a configuration as shown in FIGS. 5 and 6.

FIG. 5 shows a fourth embodiment of the invention. This embodiment corresponds to the conventional example shown in FIG.

In the figure, a lance 520 is used for cutting and drilling steel plates etc. underwater, and is a cylindrical steel pipe 1 that is made of twisted iron, aluminum, etc. The auxiliary combustion wire 3 is inscribed in the inner wall surface of the steel pipe 1 and arranged in a ring shape, and the steel pipe 1 is covered with a coating material 11. A ring-shaped corrugate 2 is formed on this steel pipe 1, and the steel pipe 1 is configured to have flexibility as a whole.
This steel pipe 1 may be a spiral corrugate instead of the ring-shaped corrugate 2. That is, the steel pipe 1 only needs to be corrugated. Further, the layer of the covering material 11 has a structure having sufficient flexibility to correspond to the flexibility of the steel pipe 1. Therefore, a gap is formed between the steel pipe 1 and the auxiliary wire 3, and a space is formed in the center of the auxiliary wire 3 arranged in a ring shape. This gap serves as the auxiliary combustion oxygen hole 4 for supplying auxiliary combustion oxygen supplied from the oxygen cylinder 570 shown in FIG.
Oxygen holes 9 for cutting and drilling are respectively configured to supply oxygen for cutting and drilling supplied from 70 .

FIG. 6 shows a fifth embodiment of the invention. This embodiment corresponds to the conventional example shown in FIG.

In the figure, a lance 520 is used when the diameter of the lance is small, such as an electrode rod for oxygen arc cutting and perforation. The combustion aid material is
Although not inserted, a pipe-shaped combustion auxiliary material 14 made of overlapping steel strips is arranged inside the steel pipe 12. Further, a ring-shaped corrugate 13 is formed on the steel pipe 12, and the steel pipe 12 is configured to have flexibility as a whole. This steel pipe 12 may be a spiral corrugate instead of the ring-shaped corrugate 2. That is, the steel pipe 12 only needs to be corrugated. Also,
The steel pipe 12 is covered with a coating material 15. Further, the layer of the covering material 15 has a structure having enough flexibility to sufficiently correspond to the flexibility of the steel pipe 12. Furthermore, when the lances are wound around the drum 550, they also have insulating properties to prevent short circuits between the lances. In this way, the lance 10 shown in FIG. 6 is used by supplying oxygen to the combustion auxiliary material 14 provided inside the steel pipe 12 and the base material 300 which is the material to be cut.

[Effect of idea]

As explained above, according to the present invention, the lance is not made by cutting the entire length of the lance to a fixed length (approximately 2 to 3 m) from a hard steel pipe as in the past.
The steel tube and inner tube are corrugated in a ring shape, spiral shape, etc., making the entire lance flexible, making it possible to manufacture endless long lances, and drum winding. ,
It can be rolled up into bundles for easy storage and transportation.

Furthermore, according to the present invention, the steel tube and inner tube can be processed with corrugations such as bellows and spiral to make the lance endlessly long, so it can be stored in drums, bundles, etc. This eliminates the need to stop the work after each set length and attach a new lance to the torch, unlike in the conventional method, where the lance gradually burns and wears out from the tip and is used for a set length. , it can be used continuously for a long time, and the efficiency of drilling and cutting work can be greatly improved.

Furthermore, according to the present invention, conventional lances were constructed from hard steel pipes, which could not be bent, and were made by cutting the entire length of the lance to a fixed length. The steel tube and inner tube have corrugations such as bellows and spirals, so the lance can be bent freely and has improved operability even in tight spaces. can do.

Furthermore, according to the present invention, since the auxiliary wires inserted into the steel pipe are twisted, when the lance is bent, the auxiliary wires do not have an extreme bending difference, and can be used normally. When the bending length is longer than the twist pitch length, the length of each auxiliary wire can be made uniform.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a lance for oxygen cutting and drilling showing a first embodiment of the present invention, Fig. 2 is a sectional view of a lance for oxygen cutting and drilling showing a second embodiment of the invention, and Fig. 3 is a sectional view of a lance for oxygen cutting and drilling showing a second embodiment of the invention. FIG. 4 is a configuration diagram of a cutting machine using the oxygen lance of the present invention, and FIG. 5 is a cross-sectional view of a lance for oxygen cutting and drilling showing a third embodiment of the present invention. 6 is a sectional view of a lance for oxygen arc cutting and drilling showing a fifth embodiment of the present invention; FIG. 7 is a configuration diagram of an oxygen arc cutting machine using the oxygen arc lance of the present invention; Fig. 8 is a block diagram of a conventional oxygen lance cutting machine using the oxygen lance method, Fig. 9 is a sectional view of a conventional oxygen cutting lance, Fig. 10 is a sectional view of a conventional oxygen cutting lance, and Fig. 11 is a sectional view of a conventional oxygen cutting lance. The figure is a sectional view of a conventional lance for oxygen cutting and drilling, Figure 12 is a configuration diagram of a conventional oxygen arc cutting machine using the arc fusing method, Figure 13 is a sectional view of a conventional lance for oxygen cutting and drilling, and Figure 14 is a sectional view of a conventional lance for oxygen cutting and drilling. FIG. 2 is a sectional view of a conventional oxygen arc cutting lance. 1, 12... steel pipe, 2, 7, 13... ring-shaped corrugate, 3... auxiliary combustion wire, 4... oxygen hole for auxiliary combustion, 5... void, 6... steel inner tube, 8... space,
9... Oxygen hole for cutting and drilling, 420, 520... Lance, 11, 15... Covering material.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A lance for oxygen cutting and perforation used in an oxygen fusing device that cuts and perforates metal, concrete, etc. by passing oxygen into a steel pipe containing an auxiliary wire, and a steel pipe constituting the lance. In addition to applying ring-shaped or spiral corrugation to the
A lance for oxygen cutting and drilling, characterized by adding twist to the above-mentioned auxiliary wire. (2) In the case of a double-walled steel pipe, both the outer pipe and the inner pipe are subjected to a ring-shaped or spiral corrugation process. lance for use. (3) The lance for oxygen cutting and drilling according to claim 1 or 2, wherein the outer circumferential surface of the steel pipe is coated with a flexible coating material.