JPH07150376A - Device for supplying purging gas to pipe material - Google Patents

Abstract

PURPOSE:To prevent the carry over of fragments and deteriorated matter, etc., of gaskets into a pipe material by pressing a gas feed port member connected to an advancing and retreating means via a universal bearing member and a gas accepting port member located at a tray to each other in metal-to-metal touch. CONSTITUTION:A long-sized pipe material coil is placed on the tray in a furnace and is heat treated. At this time, a purging gas is passed into the pipe material to evaporate and remove the fats and oils sticking to the inside surface thereof. The tray of the device for supplying the purging gas to the pipe material, as described above, is provided with the gas accepting port member 31 having the gas accepting port 8. On the other hand, the furnace side is equipped with the gas feed port member 51 having the gas feed port 71 movably forward and backward to verge on the gas accepting port member 31 by means of a cylinder rod 41. These two members are pressed to each other in the metal-to-metal touch. The gas feed port member 51 and the cylinder rod 41 are connected via supporting rods 64, 65 and the universal bearing member consisting of a spherical body 61 and spherical bearing 62 supported by a shaft 53. Further, the gas feed port member 51 is preferably projectingly provided with an annular piece 72 rounded at its front end enclosing the gas feed port 71.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purge gas supply device for pipe materials. Oils and fats used as a lubricant adhere to the outer surface and the inner surface of the pipe material that has been rolled or drawn. When heat-treating such a pipe material, for example, when performing bright annealing treatment on a copper pipe, oils and fats attached to the outer surface thereof can be relatively easily evaporated and removed, while oils and fats attached to the inner surface thereof are It cannot be easily removed by evaporation. This is especially true when the pipe material is like a long pipe coil wound in a coil shape. If the pipe material is heat-treated while oils and fats adhere to the inner surface, the product quality will be significantly impaired. Therefore, in general, when heat-treating the above pipe material, a purge gas, for example, DX gas, is introduced into the pipe material.
Nitrogen gas, argon gas, etc. are forced to flow to evaporate and remove the oils and fats attached to the inner surface of the gas. TECHNICAL FIELD The present invention relates to a purge gas supply device for a pipe material for evaporating and removing oils and fats attached to the inner surface of the pipe material.

[0002]

2. Description of the Related Art Conventionally, as a purge gas supply device for a pipe material, a gas receiving member is attached to a tray on which the pipe material is placed, and the gas transmitting member can be moved forward and backward with the furnace side facing the gas receiving member. , Which is equipped with packing at both abutting portions of the gas receiving member and / or the gas sending member (Japanese Patent Laid-Open No. 5726/1993).
3). In this conventional device, the gas inlet member is moved forward with the pipe member placed on the tray connected to the gas inlet member, and the gas inlet member and the gas outlet member are brought into contact with each other via packing. It is like this. However, this conventional device has a drawback in that packing fragments, deteriorated products, and the like are brought into the inside of the pipe material by repeated use, and these impair product quality.

[0003]

The problem to be solved by the present invention is that, in the conventional apparatus, packing fragments, deteriorated products, etc. are brought into the pipe material by repeated use.

[0004]

SUMMARY OF THE INVENTION In the present invention, however, a gas receiving member is attached to a tray on which tubing is placed,
In a purge gas supply device equipped with a gas inlet member facing the furnace so that the gas inlet member can move forward and backward, the gas inlet member and the gas outlet member are brought into contact with each other by metal touch, and the gas outlet member And a means for advancing and retracting the same through a universal bearing member, relating to a purge gas supply device for a pipe material.

In the present invention, a gas receiving member is attached to the tray on which the pipe material is placed. The gas receiving member is connected to the pipe material placed on the tray. On the furnace side, a gas inlet member is provided so as to be able to move forward and backward facing the gas inlet member. For example, a cylinder mechanism is adopted as the advancing / retreating means of the gas feed member. The gas inlet member and the advancing / retreating means thereof are connected via a universal bearing member. As the universal bearing member, for example, a universal bearing or a universal joint is adopted. The gas receiving member and the gas sending member are directly brought into contact with each other by a metal touch without using a packing. Heat-resistant steel, for example, is adopted as the gas receiving member and the gas sending member.

[0006] As the gas inlet member, it is preferable that an annular piece having a rounded tip is provided so as to surround the gas outlet of the gas outlet member. Heat resistant steel, for example, is also used for the annular piece. When the gas feed member is moved forward by the advancing / retreating means, the rounded tip of the annular piece more securely abuts the gas receiving portion with a metal touch, and at this time, the annular piece makes the gas of the gas receiving member This is because the state of surrounding the receiving port prevents gas leakage between the gas receiving member and the gas sending member.

The purge gas supply device of the present invention can be installed in any place such as the charging part of the heat treatment furnace, the heating chamber, and the extraction part. Further, the purge gas supply device can be installed not only on one side in the width direction of the heat treatment furnace but also on the other side. In this case, one end of the pipe material placed on the tray is connected to the gas receiving portion on one side, and the other end of the pipe material is connected to the gas receiving portion on the other side, and the purge gas is supplied. One side gas inlet → One side gas inlet → Tubing →
Flow through the path from the gas inlet on the other side to the gas inlet on the other side.

[0008]

Since the gas receiving member and the gas sending member directly contact with each other by a metal touch without using the packing, fragments of the packing and deteriorated products are not brought into the pipe material. Even if the tray is misaligned, the misalignment is absorbed by the free bearing member that connects the gas delivery member and the advancing / retreating means, so that the gas delivery member is surely brought into contact with the gas receiving member of the tray. Therefore, it is possible to prevent gas leakage between the two.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall front view schematically showing a part of an embodiment of the present invention in a longitudinal section. A roller 12 for transportation is mounted in a preheating chamber 11 of the heat treatment furnace in the width direction of the furnace. A tray 21 is placed on the roller 12, and a long pipe coil-like pipe material A wound in a coil shape is placed on the tray 21. The gas receiving member 3 is provided on both sides of the tray 21.
1, 32 are attached, one end of the pipe material A is connected to the gas receiving member 31, and the gas receiving member 32
The other end of the pipe material A is connected to.

From both sides of the furnace wall, cylinder rods 41, 4
2 is inserted into the furnace, and the cylinder rods 41, 42
Cylinder cylinders 43 and 44 for advancing and retreating are installed on both outsides of the furnace wall. A gas outlet member 51 is attached to the tip of the cylinder rod 41 facing the gas receiving member 31, and a gas inlet member 52 is attached to the tip of the cylinder rod 42 facing the gas receiving member 32. There is. A gas supply source 55 installed outside the furnace is connected to the gas outlet member 51 via a stretchable member 53, and a heat exchange installed outside the furnace via a stretchable member 54 to the gas outlet member 52. The device 56 is connected.

FIG. 2 is a partially enlarged plan view showing the same embodiment as FIG. 1 in a partial cross section. A spherical bearing 62 that slides on the sphere 61 is attached to the tip of the cylinder rod 41, and a shaft 63 of the sphere 61 is mounted on support rods 64 and 65 extending from the gas feed port member 51. . A gas delivery port 71 is opened on the tip surface of the gas delivery port member 51, and an elliptical annular piece 72 surrounding the gas delivery port 71 is provided in a protruding manner. The tip end of the annular piece 72 is rounded. It has been subjected.

When the cylinder rod 41 is advanced, the gas delivery port member 51 is advanced through the spherical bearing 62, the spherical body 61, etc., and the tip of the annular piece 72 is brought into contact with the tip surface of the gas receiving port member 31. Even if the tray 21 is misaligned and therefore the gas receiving member 31 is misaligned, the spherical bearing 62 absorbs the misalignment, so that the tip of the annular piece 72 extends over the entire circumference of the gas receiving member. It comes into contact with the tip end surface of 31.
The gas sending member 51 and the gas receiving member 31 are directly brought into contact with each other with a metal touch via an annular piece 72 having a rounded tip, and the gas sending port 71 of the gas sending member 51 and the gas receiving member 3
The gas receiving port 81 of No. 1 is connected. Although not described, the mutual relationship among the cylinder rod 42, the gas feed port member 52 and the gas receiving port member 32 is similar.

[0013]

As is apparent from the above, in the present invention described above, the gas receiving member and the gas sending member are directly brought into contact with each other by a metal touch without using a packing, so that the packing is provided inside the pipe material. This has the effect of not bringing in fragments or deteriorated items.

[Brief description of drawings]

FIG. 1 is an overall front view schematically showing a part of an embodiment of the present invention in a longitudinal section.

FIG. 2 is a partially enlarged plan view showing the same embodiment as FIG. 1 in a partial cross section.

[Explanation of symbols]

11 ... Preheating chamber, 12 ... Roller, 21 ... Tray, 31, 32 ... Gas receiving member, 41, 42 ...
Cylinder rods, 51, 52 ... Gas inlet member, 55
... Gas supply source, 62 ... Spherical bearing, 72 ... Annular piece

Claims (2)

[Claims] 1. A purge gas supply device in which a gas receiving member is attached to a tray on which tubing is placed, and a gas feeding member is provided so as to be able to advance and retreat facing the gas receiving member on the furnace side. A purging gas supply device for a pipe material, wherein the receiving member and the gas sending member are brought into contact with each other by a metal touch, and the gas sending member and its advancing / retreating means are connected via a free bearing member. 2. The purge gas supply device for a pipe material according to claim 1, wherein the gas outlet member is provided with an annular piece having a rounded tip which surrounds the gas outlet of the gas outlet member.