JPH0125366B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection mechanism for a gas supply pipe for gas bubbling in a refining vessel such as a ladle (hereinafter referred to as a "ladle, etc."), and relates to a connection mechanism for a gas supply pipe for gas bubbling. The purpose of this is to be able to automatically obtain it in conjunction with the work of supporting a pot or the like on a support stand.

Generally, smelting operations are carried out by placing molten steel tapped from an arc furnace or converter into a ladle, etc., and subjecting the molten steel to treatments such as slag and degassing. In this case, an inert gas such as argon or nitrogen is blown into the bottom or side wall of the ladle while the above-mentioned treatments such as removal of slag, heating, and degassing are performed.
(Gas bubbling) In this way, by blowing inert gas into the molten steel in the ladle, etc., the action of stirring the molten steel is obtained, and through this stirring action, the temperature of the molten steel is made uniform, and the temperature of the molten steel is uniformized. This provides the effect of homogenizing the components of the molten steel, as well as the effect of actively bringing the slag and molten steel into contact and promoting their reaction.

However, the gas for gas bubbling is supplied from a gas supply device via piping and is blown into a ladle, etc., but the ladle etc. is used for processing purposes such as slag, heating, and degassing. Because the operating position changes depending on the situation, the gas supply equipment for gas bubbling is installed at each operating position, and as the operating position of the ladle, etc. moves, the piping for the ladle, etc. can be changed. It is set up so that it can be done. Conventionally, the switching operation has been performed manually. However, the switching operation described above must be performed at a location near the ladle, which is extremely dangerous, and the porous plug is likely to become clogged if gas is not supplied from that part for a long time. For this reason, it is required that the above-mentioned switching operation be carried out quickly, but the reality is that conventional manual operation cannot be expected to perform quickly.

The present invention is an attempt to improve the conventional situation as described above. That is, the present invention allows the tip of the piping on the side that communicates with the porous plug to face the trunnion protruding from the side wall of the ladle, etc., while supporting the tip of the piping on the side that communicates with the gas supply device by the trunnion. By arranging it so that it faces the platform, it is possible to automatically connect the above-mentioned piping at the same time that a ladle or the like is installed on a truck or a slag platform at each operating position. Among these characteristics, the gist of the present invention is that in a ladle or the like that is equipped with a porous plug on the bottom or side wall and a trunnion on the side wall, a gas supply hole communicating with the porous plug is provided on the trunnion side. The distal end of the trunnion is provided so as to open downward, while a port is provided on the support side of the trunnion to communicate with the gas supply device. The port is provided so as to open upward in correspondence with the opening at the tip of the supply hole, and the port has openings at both the upper and lower ends, and a heat-resistant packing is formed to be compressible and deformable, with a part of it always protruding from the port. This means that it is configured so that it is provided in a state where it is possible to do so.

Specific embodiments of the present invention will be described below with reference to illustrative drawings.

A is a truck installed so that it can run on rails 2 via wheels 1, 1, 1, 1, and a through hole 3 is provided on the truck A. The through hole 3 is formed into a rectangular shape with an appropriate diameter so that a portion near the bottom of a ladle B, which will be described later, can be inserted therethrough.

Support stands 4, 4 for the ladle B are erected on the cart A along both side edges of the through hole 3 in a left-right and left-right opposed manner. The support stand 4 consists of a leg part 4a that stands up from the cart A with an appropriate height dimension, and a support stand part 4b that is suspended horizontally on the upper end of the leg part 4a.
A pair of front and rear guide frames 5, 5 are erected above.
Both guide frames 5, 5 are provided so as to face each other with an appropriate interval between them so as to be able to support trunnions 10, 10, which will be described later. The guide surfaces 5' and 5' are arranged at an appropriate inclination angle so that the distance between the guide surfaces 5' and
5' is formed. And of the guide frames 5 and 5,
An air supply hole 6 is bored in one of the guide frames 5. The supply hole 6 is provided diagonally downward with an appropriate slope so that its tip opening faces above the support base portion 4b. A port 7 is provided on the support base portion 4b of one of the support bases 44, located approximately in the middle between the guide frames 5, 5. The port 7 is formed by carving a bottomed cylindrical recess with an appropriate diameter on the support base portion 4b, and a heat-resistant packing 8 is fitted into the port 7. The heat-resistant packing 8 is formed into a cylindrical shape with openings at both the upper and lower ends, and the cross-sectional shape of the peripheral wall surface is such that it gradually bulges outward from the upper and lower openings in the relative direction and becomes larger in diameter. By forming the supporting base part 4 into a dogleg shape, it is provided so that it can be compressed and deformed in the vertical direction.
In a state where the trunnions 10, 10 are not supported on b, a portion of the upper end near the opening is provided so as to protrude from the port 7, as shown in FIG.

An inert gas supply pipe 9 extending from an inert gas supply device (not shown) is connected to the bottom side of the port 7.

On the other hand, B is the aforementioned ladle, and the ladle B is formed into a bottomed cylindrical shape with an opening at the upper end, and a pair of left and right trunnions 10 are protruded from the side ends thereof. Ru. Both trunnions 10, 10 are 180 such that they can be supported on the support bases 4b, 4b.
It is protruded with a phase angle of degrees. Of the two trunnions 10, 10, one of the trunnions, that is, the trunnion 10 located on the side corresponding to the support base portion 4b that opens the port 7, is provided with an inert gas supply hole 11. The tip opening 11' of the supply hole 11 is opened downward so that it can face the port 7, and a supply pipe 12 extends from the base of the supply hole 11, and the tip thereof is opened downward so that it can face the port 7. It is connected to a porous plug 13 provided at the bottom of the ladle B.

Next, its effect will be explained.

When the ladle B is not mounted on the truck A, that is, when the trunnion 10 on the ladle B side is not supported on the support part 4b of the support base 4, the heat-resistant packing 8 is attached to the port 7. is in a state in which a portion of the upper end near the opening protrudes upward from the top plate surface of the support base portion 4b. Air is fed into the port 7 via the supply pipe 9 to prevent the port 7 from clogging. In addition, air is blown onto the top plate surface of the support base part 4b through the supply hole 6, causing dust to accumulate on the top plate surface of the support base part 4b and preventing the port 7 from accumulating on the top plate surface of the support base part 4b.
The effect of preventing clogging has been obtained.

However, when ladle B is mounted on truck A which is in a state where the above-mentioned effect can be obtained, trunnion 1
When the ladle B is suspended via the crane mechanism C that engages with the guide frames 5 and 5, the ladle B is lowered from its suspended position.
The trunnions 10, 10 are placed on the support bases 4b, 4b through the guiding action of the ladle B, as shown in FIGS. 1 and 2, with the ladle B suspended on the cart A. The state to be loaded is obtained.

By obtaining a state in which the ladle B is mounted on the trolley A in this way, one of the supporting base portions 4
At b, the upper end opening of the heat-resistant gasket 8 inserted into the port 7 is compressed and deformed by the weight of the trunnion 10, and the upper end opening is in close pressure contact with the lower bottom surface of the trunnion 10, and the trunnion 1
The tip opening 1 of the supply hole 11 drilled on the 0 side
1' faces the opening of the port 7.
That is, a state is obtained in which the supply pipe 9 on the support stand 4 side communicates with the supply pipe 12 on the ladle B side via the port 7.

With the supply pipes 9 and 12 in communication with each other in this manner, the supply pipe 9 is supplied with argon, nitrogen, or other gas from an inert gas supply device in place of the air that had been sent into the supply pipe 9 up until now. Activated gas is introduced. The inert gas sent into the supply pipe 9 in this way is transferred to the port 7, the supply hole 11, the supply pipe 12, and the porous plug 13.
It is sent into the ladle B through the process. By feeding the inert gas into the ladle B in this manner, an effect of stirring the molten steel within the ladle B can be obtained.

On the other hand, as shown in FIG. 5, there is a slight play between the trunnion 10 supported on the support base portion 4b and the guide frames 5, 5, and the amount of play is provided between the supply pipe 9 and the supply hole 11. Although there is a possibility of positional deviation occurring, this positional deviation can be absorbed by appropriately selecting the diameter of the port 7. Note that the above embodiment is ladle B.
Although the case where the ladle B is mounted on the truck A is described, the same applies when the same ladle B is installed at each operating position (for example, when installed on a slag removal stand).

The present invention is constructed as described above, and includes:
As mentioned above, a supply hole communicating with the porous plug is provided on the side of the trunnion protruding from the side wall of the ladle so that its tip opening opens toward the support stand of the trunnion. A port communicating with a supply pipe extending from an inert gas supply device is provided on the side so as to open in correspondence with the opening at the tip of the supply hole, and the port has openings at both upper and lower ends. A part of the heat-resistant packing, which is formed to be compressively deformable by the trunnion, is in a state where it always protrudes from the port, and when the trunnion is supported on the support base, it is compressively deformed through the load of the trunnion, and the trunnion is compressed and deformed. By providing the trunnion so that it is in close contact with the lower bottom surface of the trunnion, it is possible to automatically connect the inert gas supply pipe at the same time as the trunnion is supported on the support base. As a result, the connection can be made without the dangers encountered in conventional manual connection operations, and the safety of the connection can be improved.

In addition, it has become possible to automatically connect the inert gas supply pipe at the same time that the trunnion is supported on the support base, making it possible to supply inert gas to the ladle. As a result, it has become possible to prevent clogging of the porous plug.

Further, in the present invention, a port is provided on the support stand side in correspondence with the supply hole opening on the trunnion side, and the supply hole is made to face the port, so that the support stand and the trunnion can be connected to each other. If a positional deviation occurs between the ports, the port can absorb the positional deviation through the port, and the port is always equipped with a heat-resistant packing that has openings at both the upper and lower ends and is compressible and deformable. The heat-resistant packing is provided so that it protrudes from the port, and the heat-resistant packing is compressed and deformed by the load of the trunnion, and its end is pressed against the trunnion, thereby creating an effective sealing effect at the connection. I was able to obtain it.

[Brief explanation of drawings]

Fig. 1 is a plan view showing the ladle mounted on the cart, Fig. 2 is a side view of the same, Fig. 3 is a front view of the ladle, Fig. 4 is a plan view of the support base, and Fig. 5 is a plan view of the ladle. FIGS. 6 and 7 are enlarged partially cutaway views showing a state in which the trunnion is supported on the support base, and FIGS. 6 and 7 are enlarged views of the support portion of the trunnion relative to the support base, showing operating states. A...Dolly, B...Ladle, C...Crane mechanism, 1...Car transport, 2...Rail, 3...Through hole,
4... Support stand, 4a... Leg part, 4b... Support stand part, 5... Guide frame, 5'... Guide surface, 6...
Supply hole, 7...Port, 8...Heat-resistant gasket, 9
... Supply pipe, 10 trunnions, 11 supply holes,
11' tip opening, 12...supply pipe, 13...
...Porous plug.

Claims (1)

[Claims] 1. In a refining vessel such as a ladle that is equipped with a porous plug on the bottom or side wall and a trunnion on the side wall, a gas supply hole communicating with the porous plug is provided on the trunnion side so that the tip thereof opens downward. A port communicating with the gas supply device is provided on the support side of the trunnion so as to correspond to the opening at the tip of the supply hole, and the port has openings at both the upper and lower ends for compression. A connection mechanism for a gas supply pipe for gas bubbling in a refining vessel such as a ladle, which is provided with a deformable heat-resistant packing so that a part thereof always protrudes from a port.