JPH02102989A - Method of fitting oxygen lance pipe with different outer diameters to holder and pipe socket used therein - Google Patents

Abstract

PURPOSE:To simply and surely connect pipes and fit same to a holder by making the holder side outside diameter fixed and fitting an oxygen lance pipe with a pipe socket, the pipe fitting side inside diameter of which corresponds to the outside diameter of a pipe to be fitted to a holder having a fixed insert bore diameter. CONSTITUTION:A pipe socket 1 has a bottleneck portion 11 gradually reduced in diameter towards the substantially central portion, so that an inserted lance pipe is strangulated by the bottleneck portion 11 and fixed. The outside diameter D on the holder side 12 of the above pipe socket 1 is let have a fixed diameter corresponding to an insert opening of a holder head. That is, if pipe sockets 1 of several kinds are adjusted in order that lance pipes of various kinds have such a diameter as to be inserted in an opening on the connection side 13, the lance pie having diameters of several kinds can be fitted simply and surely by the same holder head.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the connection of oxygen lance pipes used in metal melt cutting in steel mills and foundries, pile cutting in construction and civil engineering, and the like.

[Conventional technology]

Conventionally, oxygen lance pipes are φ12.7, φ13.8 carp, and φ15.9 depending on the target to be cut.

Plural types of diameters such as φ17 and 3 mm are used.

As a means of connecting these lance pipes due to wear and tear, (1) Cut a thread on the inside of a short steel pipe with a length of about 20 to 30 u, and use lances and pipes with both ends threaded. Connecting.

(2) The lance is a short steel pipe with a length of about 100W and has an inner diameter slightly larger than that of the pipe.The lance and pipe to be connected are inserted from both ends, and both ends of the short steel pipe are mechanically rolled, etc. Caulk.

(3) As disclosed in Japanese Utility Model Publication No. 57-33266, a pipe socket made of a short steel pipe with a narrowed center and a length of around 100 mm is used to connect from both ends. There is a method in which the pipes are pushed together strongly and the narrowed part is elastically strained.

And, to attach the oxygen lance pipe to the holder,
Holder heads are prepared separately for each diameter and are attached to the holder.

[Problem to be solved by the invention]

Attaching the connected lance pipes to the holder as described above requires frequent replacement of the lance pipes, which requires the use of lance pipes of various diameters depending on the objects when cutting many types of objects. When necessary, on-site work was extremely complicated and work efficiency was low.

The problem to be solved by the present invention is to complete a means that can easily and reliably connect pipes and attach them to a holder.

[Means to solve the problem]

The present invention was completed based on the recognition that among the conventional lance pipe connection methods, the simplest and most reliable method is the pipe socket connection method disclosed in (3) above. The above-mentioned problem was solved by using such a pipe socket as a connecting means and investigating whether it could be easily and reliably attached to a holder.

That is, in the present invention, at least the outside diameter of the holder side is a constant diameter, and the pipe attachment is performed by attaching an oxygen lance pipe with a pipe fitting 7) corresponding to the outside diameter of the pipe to which the inside diameter of the side is attached to a holder head having a constant insertion diameter. It is installed in a holder that has a

The above-mentioned pipe socket is manufactured by the above-mentioned Utility Model Publication No. 57-33266.
As disclosed in the publication, the length is such that it can be attached to the holder, and the inner diameter of the holder has a constricted part whose diameter is continuously reduced toward the center of the holder so as to form a substantially circular arc shape. A formed pipe socket, in which at least the inner diameter of the pipe connecting side is set to a constant diameter at least the outer diameter of the pipe to be connected to the holder side, and at least the inner diameter of the pipe mounting side is set to a constant diameter of the outer diameter of the pipe to be connected. It is most convenient to have a diameter that corresponds to

Furthermore, in order to use the same pipe socket for connecting worn out pipes, it is preferable to make the outer diameters of both ends of the pipe socket the same diameter, that is, to match the insertion diameter of a specific holder head.

This makes it possible to use the same holder head without replacing parts of the holder that grips the lance.
Lance pipes having various diameters can be easily and reliably attached.

〔Example〕

FIG. 1 is a diagram showing the configuration of a pipe socket 1 used in the present invention.

Referring to the figure, a pipe socket 1 is made of a pipe material with a length comparable to that of a relatively short ordinary connection socket. The inner anal part shown in the partial cross-sectional view is a narrowed part 1 whose diameter is continuously reduced in a substantially arc shape toward the substantially central part.
1 is formed.

Thereby, the inserted lance pipe can be narrowed and fixed at the narrowed portion 11.

The holder side 12 of the pipe socket 1 has a vertical end surface so that it can be gripped with a rubber gasket, and its outer diameter is a constant diameter, that is, a diameter that matches the insertion opening of the holder head, which will be described later.

Furthermore, the inner diameter d of the pipe socket 1 on the connection side 13 with the lance pipe is the outer diameter of the lance pipe used, specifically, φ12.7m11. φ13.8mm,
Four types of lance pipes are prepared in advance so that each type of lance pipe has a diameter suitable for φ15, 9 mm, and φ17.3 mm, so that each type of lance pipe can be inserted into the opening of the connecting side 13.

Furthermore, the outer diameter D1 of the pipe socket 1 on the connection side 13 with the lance pipe is the same as the outer diameter of the holder side 12, and the pipe socket 1 on the holder side 12
The inner diameter d1 of the pipe socket 1 on the connecting side 13 is
By making the inner diameter the same as that of this pipe connection side) 1
can be used as a socket for connecting ordinary pipes.

2(a) and 2(b) show lance pipes 2a and 2b to be inserted and fixed into the respective connection side 13 openings shown in FIG.
Lance pipes 21a and 21b are shown fitted with pipe sockets (la and lb) prepared according to the outer diameter of the lance pipes 21a and 21b. As shown in the figure, the outer diameters of the holder sides 12a and 12b of the respective pipe sockets 1a and 1b are the same, regardless of the outer diameters of the attached lance pipes 2a and 2b.

In these figures, 14 is a vibrator socket (Ia).

The caulking part is shown when attaching the lb to the lance pipes 2a and 2b.

FIG. 3 is a diagram showing a state in which the lance pipe 2 to which the pipe socket 1 according to the present invention is attached is attached to the holder 3.

Referring to the figure, when gripping the lance pipe 2 with the pipe socket 1 attached with the holder 3, loosen the holder head 31, insert the pipe socket 1 through the insertion port 32, and prevent backflow through the collar 33 and rubber gasket 34. When the holder head 31 comes into contact with the front end of the device 35
into the holder body 36. As a result, the rubber gasket 34 is compressed to grip the lance pipe 2 and prevent leakage of oxygen gas flowing inside the pipe.

Furthermore, the pipe socket 1 used in the present invention can be used to add a new lance pipe 22 to an ember lance pipe 21 and attach it to the holder 3, as shown in FIG.

〔Effect of the invention〕

The present invention can achieve the following effects by attaching the lance pipe to the holder.

(1) It is sufficient to prepare a single holder head, and there is no need to change the head for each size of lance pipe to be used.

(2) Not only is it easy to attach to the holder, but the lance pipe can also be connected easily and reliably.

(3) By preparing in advance an integrated lance pipe and pipe socket, the number of packaging items can be reduced during transportation.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing the structure of a pipe socket used in the present invention. FIG. 2 shows a lance pipe with a pipe socket, which has the pipe socket shown in FIG. 1 attached to its tip. FIG. 3 is a diagram showing a state in which the lance pipe with a vibrator socket according to the present invention is attached to a holder. Figure 4 shows a new lance pipe added to the ember lance pipe using a pipe socket and attached to the holder. 1: Pipe socket 2: Lance pipe 3: Holder

Claims (1)

[Scope of Claims] 1. A holder head having at least a constant diameter for insertion of an oxygen lance pipe with a pipe socket that has a constant outer diameter on the holder side and an inner diameter on the pipe attachment side that corresponds to the outer diameter of the pipe to be attached. A method for attaching oxygen lance pipes having different outer diameters to a holder, the method comprising: attaching oxygen lance pipes having different outer diameters to a holder. 2. A pipe socket that has a length that can be attached to a holder, and has a constricted part whose inner cavity is continuously reduced in diameter in a substantially circular arc shape toward the substantially central part thereof,
A pipe characterized in that at least the inner diameter of the pipe connecting side is a constant diameter, and the outer diameter of at least the holder side of the pipes to be connected is a constant diameter, and at least the inner diameter of the pipe attachment side is a diameter corresponding to the outer diameter of the pipe to be attached. socket.