JP2002059262A - Nozzle for gas welding utilizing nozzle body for gas cutting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nozzle for gas welding utilizing a nozzle body for gas cutting in which two works of gas cutting and gas welding can be jointly performed by one torch, the switching is simple because only nozzle tips are changed, and the facility cost can be reduced. SOLUTION: This nozzle 4 for gas welding utilizing the nozzle body for gas cutting forms a welding nozzle body 10 utilizing the nozzle body for gas cutting, and comprises the welding nozzle body 10, the nozzle tip 13 for gas welding, an adapter 12 for fitting the nozzle tip for gas welding, and a cap nut 14. The adapter 12 is connected to a tip part of the welding nozzle body 10 by using the cap nut 14. The nozzle tip 13 for gas welding is connected to the tip part of the adapter 12. During the gas welding, the mixture gas of the fuel and oxygen is fed to the nozzle tip 13 for gas welding while oxygen for cutting is not fed to a gas cutting oxygen distribution hole in the welding nozzle body 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can attach a crater tip for gas welding by using a crater body of a crater for gas cutting attached to a head of a torch for gas cutting.
The present invention relates to a gas welding crater body-using gas welding crater that can perform two operations of gas cutting and gas welding by using a single torch.

[0002]

2. Description of the Related Art Conventionally, gas cutting of metal such as steel using a gas cutting torch (blown pipe) and gas welding of metal such as steel using a gas welding torch have already been specified in the JIS standard and are widely known. I have.

[0003]

However, conventionally, when performing a gas cutting operation and a gas welding operation,
The gas cutting torch and the crater attached to it, and the gas welding torch and the crater attached to it must be prepared separately, and two types of torch and crater are required, which increases the equipment cost. ,
There was a problem that maintenance and management of these torches and craters was troublesome.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to form a welding tip body using a gas cutting tip body attached to the head of a gas cutting torch.
By attaching a gas welding tip to this welding tip body via a special adapter, two operations, gas cutting and gas welding, can be performed with a single torch, and the tip tip is replaced. Therefore, an object of the present invention is to provide a gas cutting crater using a crater main body for gas cutting, in which the switching is easy and the equipment cost is low.

[0005]

In order to achieve the above object, a gas welding crater using a gas cutting crater body according to the present invention is attached to a head of a gas cutting torch and has a cutting oxygen flow hole therein. A crater body for welding using a crater body for gas cutting having a fuel and oxygen mixed gas flow hole; a crater body for welding; a crater tip for gas welding; a crater body for welding and a crater for gas welding The adapter for gas crater tip attachment interposed between the tips and the cap nut for connecting the gas crater tip to the distal end of the gas cutting crater body is used to connect the adapter to the tip of the welding crater body. The adapter has a cap nut connected thereto, an annular outward convex portion is provided at a base end of the adapter, a male screw portion is provided at the distal end, and a fuel / oxygen mixed gas flow hole is provided inside the adapter. Setting With the base end of the adapter abutting against the distal end of the welding crater body, the annular inward convex portion of the cap nut is engaged with the annular outer convex portion of the adapter base end, and the cap nut is engaged. Is screwed into a male screw part provided at the distal end of the welding crater body, and a female screw part provided at the base end of the gas welding crater tip is screwed into the distal male screw part of the adapter. The fuel / oxygen mixed gas is supplied from the fuel / oxygen mixed gas flow hole of the main body to the fuel / oxygen mixed gas flow hole of the gas welding crater tip through the fuel / oxygen mixed gas flow hole of the adapter, and the welding crater body is cut. It is characterized in that oxygen for cutting is not supplied to the oxygen flow hole for oxygen.

[0006]

Embodiments of the present invention will now be described with reference to the drawings.

A gas cutting crater (4) using a gas cutting crater body according to the present invention is shown in FIGS. 4 to 6, and the gas welding crater (4) is a gas cutting torch (FIG. 1). Gas cutting crater body (10) attached to the head (2) of 1)
(See FIGS. 2 and 3)
As shown in FIG. 4 to FIG. 6,
By attaching a gas welding crater tip (13) via a special adapter (12), two operations of gas cutting and gas welding can be performed by one torch (1).

First, referring to FIG. 1, a gas cutting torch (1)
The gas cutting torch (1) is connected to the grip (6) at the base end of the torch body (5) at the center of the gas cutting torch (1).
An oxygen hose joint (21) and a fuel hose joint (22) are connected to the base end of the grip (6), and these joints are connected inside the grip (6).
(21) Oxygen flow line (24) and fuel gas flow line leading to (22)
(25) is provided. Grip (6) and fuel hose fitting (2
2), a fuel gas valve (23) is interposed, and the flow rate of the fuel gas is adjusted by the fuel gas valve (23). Also, a cutting oxygen valve (26) is provided at the upper end of the torch body (5), a preheating oxygen valve (27) is provided at one lower end of the torch body (5), and an injector built-in mixing valve is provided at the other side. A fuel gas pipe (7) is connected via a pipe (28),
A cutting air pipe (8) parallel to the fuel gas pipe (7) is connected to the center of the torch body (5). Both ends of the fuel gas pipe (7) and the cutting air pipe (8) are connected to the torch head (2). In the inside of the torch head (2), there is a contact receiving part that is connected to the cutting air flow path (8a) of the cutting air pipe (8) and that holds the contact (10a) on the connection side of the gas cutting crater (3). (30), a coupling hole (31) connected to the fuel gas flow path (7a) of the fuel gas pipe (7), and a crater mounting female screw portion (32) on the opening side of the coupling hole (31).

Next, referring to FIGS. 2 and 3, a cutting crater
To explain (3), the cutting crater (3) consists of a cutting crater body (10) having a contact (10a) at the base end to be inserted into the torch head (2), and a cutting crater body (10). A cutting tip (11) connected to the tip via a connection nut (14),
It comprises a cutting tip main body (10) and a lock nut (15) screwed to a male screw portion (16) on the outer peripheral surface.

In the portion near the other end of the cutting tip body (10),
A turning projection (17) having a hexagonal outer surface when viewed from the front is provided. In the center of the cutting tip body (10), a cutting oxygen flow path (18) is provided over the entire length, and on the inner peripheral surface of the tip portion of the cutting tip body (10), the diameter is larger than that of the cutting oxygen flow path (18). A large female screw portion (20) is provided. Crate body for cutting (10)
A required number of fuel / oxygen mixed gas flow paths (19) are provided at predetermined intervals in the circumferential direction at the outer portion of the central cutting oxygen flow path (18) and over the entire length of the cutting tip body (10). , A small-diameter flow path portion on the inlet side of each fuel / oxygen mixed gas flow path (19)
(19a) is opened so that it can be seen at the base of the hit (10a), and the tip of the mixed gas flow path (19) is at the end face of the cutting tip body (10) on the tip side of the tip for cutting. It is open.

On the other hand, the cutting tip (11) is composed of an outer tube (33) attached to the tip of the cutting tip body (10) via a connection nut (14), and a cutting tip inside the outer tube (33). Body (1
0) and an inner tube (34) attached to the tip of the same.

At the connection end of the outer tube (33), an annular engaging projection (33a) is provided, and the connection nut (14) fitted over the outer tube (33) is provided. ) Is engaged with the annular engaging projection (33a) on the outer tube (33) side, and the female thread (14b) of the connecting nut (14) is connected to the cutting tip. The outer tube (33) is attached to the distal end of the cutting tip main body (10) via the connection nut (14) by being screwed into the distal male screw portion (16a) of the main body (10). The outer tube (33)
It has an end wall (33b) connected to the tapered tip (33c), and a through hole (35) is formed in the center of the end wall (33b).

On the other hand, the cutting oxygen flow path (3) connected to the cutting oxygen flow path (18) of the cutting tip body (10) is provided at the center of the inner pipe (34).
6) is provided over the entire length. A male screw portion (37) is provided on the outer peripheral surface of the small-diameter end portion (34a) on the connection side of the inner pipe (34), and the male screw portion (37) is a female screw portion (20) at the tip of the cutting tip body (10). ). Further, a small-diameter nozzle-like end (34b) is provided at the tip of the inner pipe (34), and the nozzle-like end (34b) penetrates the center of the end wall (33b) of the outer pipe (33). Hole (3
5) plugged in.

The cutting oxygen flow path (36) in the inner pipe (34) is
The diameter is smaller than the cutting oxygen flow path (18) of the cutting tip body (10).

[0015] The outer tube (33) with respect to the inner tube (34) of the crater tip (11).
In the state where is fitted, between the inner and outer pipes (33) (34),
A fuel / oxygen mixed gas flow path (29) connected to the fuel / oxygen mixed gas flow path (19) on the side of the cutting crater body (10) is formed.
Oxygen mixed gas flows around the nozzle end (34b) of the inner pipe (34) between the through hole (35) in the end wall (33b) of the outer pipe (33) and the nozzle end (34b). From the narrow gap.

Next, a gas welding crater (4) according to the present invention will be described with reference to FIGS. 4 to 6. The gas welding crater (4) according to the present invention comprises a head of a gas cutting torch (1). The gas cutting crater (3) is used instead of (2). At this time, a gas cutting tip body (10), a cap nut (14), and a lock nut (15) are used.

The gas welding crater (4) according to the present invention is formed as a welding crater body by using the gas cutting crater body (10), and the welding crater body (10) and the gas welding crater tip are used. (1
3), welding crater body (10) and gas welding crater tip (13)
The apparatus includes a crater tip mounting adapter (12) for gas welding, a cap nut (14) for adapter connection, and a lock nut (15) interposed therebetween.

Here, an annular outward convex portion (12a) is provided at the base end of the crater tip mounting adapter (12) for gas welding, and a male screw portion (41) is provided at the distal end thereof.
Inside 2), a fuel / oxygen mixed gas flow hole (42) is provided. An open end of the mixed gas flow hole (42) on the proximal end side of the adapter (12) is provided with a tapered open end (43) that opens outwardly so as to increase in diameter. Thus, it is configured to communicate with all of the several fuel / oxygen mixed gas flow paths (19) on the tip side of the welding crater body (10).

On the other hand, at the base end of the crater tip (13) for gas welding, a turning outer convex part (13a) having a hexagonal outer surface as viewed from the front is provided, and this turning outer convex part (13) is provided. 13a) is provided with a female screw portion (45). Crater tip for gas welding (1
The tip (13b) of (3) is tapered, and the fuel / oxygen mixed gas flow hole (44) provided inside the gas welding tip (13) extends from the base end to the tip. It has been tapered.

The gas welding crater (4) according to the present invention has an annular inner side of the cap nut (14) with the base end of the adapter (12) abutting against the distal end of the welding crater body (10). Convex (1
4a) is engaged with the annular outward convex portion (12a) at the base end of the adapter (12), and the cap nut (14) is screwed into the male external thread portion (16a) at the tip of the welding crater body (10). . In addition, the male screw part (41) at the tip of the adapter (12) has a crater tip (13) for gas welding.
The female screw part (45) inside the base end part (13a) is screwed together, and the gas welding tip (13) is connected to the adapter (12). The distal end of the adapter (12) is brought into contact with the annular step (46) on the distal end side of the female screw (45) of the crater tip (13) for gas welding.

When a gas cutting operation is performed on steel, for example, using the gas cutting torch (blowing pipe) (1) shown in FIG. 1, the torch head (2) is attached to the torch head (2) as shown in FIGS. Attach the gas cutting crater (3) shown. At this time, the preheating flame hole, that is, the through hole (3) surrounding the jet hole of the cutting oxygen flow path (36) at the cutting tip (11) of the gas cutting crater (3)
5) Using a mixed flame of acetylene and oxygen flowing out from the furnace, heating a part of the steel and blowing high-pressure oxygen when it reaches the combustion temperature causes a violent combustion action, causing a chemical reaction, Part of the steel is turned into iron oxide and melted, and at the same time, is blown off by an oxygen jet to form a groove, which is performed by continuously progressing the groove. The combustion temperature in this case is about 1350 ° C.

Next, when performing the gas welding operation using the gas welding crater (4) according to the present invention, the gas cutting torch (1) shown in FIG. Gas welding crater according to the present invention instead of crater (3)
Attach (4) and perform gas welding work. At this time, a part of the gas cutting crater (3),
0), a cap nut (14) and a lock nut (15) are used.

The gas welding crater (4) according to the present invention is formed as a welding crater body by using a gas cutting crater body (10) attached to the head (2) of the gas cutting torch (1). Connect the base end of the adapter (12) to the distal end of the welding crater body (10) using the cap nut (14), and furthermore, the adapter (12).
Connect the crater tip (13) for gas welding to the tip of the.

Then, the fuel / oxygen mixed gas flow hole (19) of the welding crater body (10) passes through the fuel / oxygen mixed gas flow hole (42) of the adapter (12), and the gas welding crater tip (13) is closed. Supply the fuel / oxygen mixed gas to the fuel / oxygen mixed gas flow hole (44),
Cutting oxygen is not supplied to the cutting oxygen flow hole (18) of the welding crater body (10).

As described above, usually, oxygen and acetylene are mixed in the gas mixing section, and these are mixed with the gas welding tip (13).
The fuel and oxygen mixed gas are blown out from the tip of the gas flow hole (44) and burned. The combustion temperature in this case is 3300 to 340
Reach 0 ° C. The appearance of the oxygen acetylene flame changes depending on the mixing ratio of oxygen and acetylene. For example, the standard flame has a mixing ratio of oxygen and acetylene of 1: 1 and consists of a white weight and an outer flame. The heating is adjusted according to the material.

As described above, according to the present invention, the gas cutting crater (3) and the gas welding crater (4) can be exchanged, and the two operations of gas cutting and gas welding can be performed by one torch (1). Can also be used.

[0027]

As described above, according to the gas welding crater using the gas cutting crater body of the present invention, the gas cutting crater and the gas welding crater can be exchanged. A torch having both functions of welding can be obtained, and two operations of gas cutting and gas welding can be performed by one torch. Further, since only the tip of the crater needs to be replaced, the switching is simple, the equipment cost is low, and the crater is made compact by sharing part of the crater, that is, the crater body and the cap nut.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a commonly used gas cutting torch.

FIG. 2 is a side view of a gas cutting crater of a commonly used gas cutting torch.

FIG. 3 is an enlarged sectional view of the crater.

FIG. 4 is a side view showing an embodiment of a gas welding crater according to the present invention, in which a part of a gas cutting crater of a gas cutting torch is used.

FIG. 5 is an enlarged sectional view of the crater.

FIG. 6 is an exploded side view of the crater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas cutting torch 2 Head 3 Gas cutting crater 4 Gas cutting crater body using gas welding crater 10 Gas welding crater body (Gas cutting crater body) 11 Gas cutting crater tip 12 Adapter 12a Annular outer convex part Reference Signs List 13 crater tip for gas welding 14 Cap nut 14a Annular inward convex part 16 Male screw part 16a Male screw part at tip 18 Cutting oxygen flow hole 19 Fuel / oxygen mixed gas flow hole 41 Male screw part 42 Fuel / oxygen mixed gas flow hole 44 Fuel / Oxygen mixed gas flow hole

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Osamu Nakazato, Inventor: 6,224, Kaiyama-cho, Sakai City Showa Aluminum Co., Ltd. (72) Inventor: Teruo Fushiki, 6-224, Kaiyamacho, Sakai City: Showa Aluminum Co., Ltd. F Terms (Reference) 3K017 CA07 CB01 CB09 CB12 CC04 CH01

Claims (1)

[Claims] 1. A welding tip body which is attached to a head of a gas cutting torch and has a cutting oxygen flow hole and a fuel / oxygen mixed gas flow hole therein. A welding crater body, a gas welding crater tip, a gas welding crater tip mounting adapter interposed between the welding crater body and the gas welding crater tip, and a tip end of the gas cutting crater body. A cap nut for connecting the adapter to the distal end of the welding crater body using a cap nut for connecting the gas cutting tip, and an annular outward convex portion at the base end of the adapter. The male screw portion is provided in each of the portions, the fuel / oxygen mixed gas flow hole is provided in the adapter, and the base end of the adapter is abutted against the distal end of the welding crater body. The convex part The cap nut is screwed into the male thread provided at the tip of the welding crater body, and the cap nut is screwed into the male thread at the tip of the adapter. The female screw portion provided at the base end is screwed together, and the fuel / oxygen mixed gas at the crater tip for gas welding passes from the fuel / oxygen mixed gas flow hole of the welding crater body through the fuel / oxygen mixed gas flow hole of the adapter. A gas welding crater body-using gas welding crater in which a fuel / oxygen mixed gas is supplied to the circulation hole and no cutting oxygen is supplied to the cutting oxygen circulation hole of the welding crater body.