JPH0160336B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection mechanism for connecting a gas supply pipe for gas bubbling to a refining vessel such as a ladle.
The purpose of this is to connect the piping quickly and safely.

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, heating, and degassing. In this case, for example, argon,
An inert gas such as nitrogen is blown in. (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. Since the operating position moves depending on the situation, the gas supply device for gas bubbling is installed at each operating position. Therefore, it is necessary to change the piping for the ladle etc. every time the operating position of the ladle etc. is moved.

Conventionally, the switching operation has been performed manually. However, this switching operation must be performed at a location near the ladle, etc., which is extremely dangerous, and porous plugs tend to become clogged if gas is not supplied for a long time. Although it is required to perform the above-mentioned switching operation quickly, the reality is that it cannot be expected to perform the switching operation quickly if it is done manually.

The present invention is an attempt to improve the conventional situation as described above. That is, the present invention provides a holder that is provided on the trunnion side so as to communicate with the porous plug when the trunnion is supported on the support base, and a connecting tube that is provided on the support base side so as to communicate with the gas supply device. The feature is that the connecting action is obtained by pressure contact through the pressing action caused by the vertical movement of the connecting tube, and the gist is that the trunnion side has a supply hole that communicates with the porous plug. The holder formed in the opening is provided so as to face the support base of the trunnion, while a connecting tube communicating with the inert gas supply device is provided on the support base side of the trunnion.
The head of the connecting tube is movable up and down so as to come into pressure contact with the holder when the trunnion is supported on the support base.

The present invention will be described below with reference to a first embodiment shown in FIGS. 1 to 7, a second embodiment shown in FIGS. 8 to 10, and a third embodiment shown in FIGS. 11 and 12. will be explained in detail.

In the first embodiment shown in FIGS. 1 to 7, A is a bogie installed to be able to run on a rail 2 via wheels 1, 1, 1, 1;
A through hole 3 is provided on the top. The through hole 3 is formed into a rectangular shape with an appropriate length so that 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 along both side edges of the through hole 3 so as to be opposite to each other. The support stand 4 consists of a leg part 4a which has a plurality of leg pieces 4a' and stands up from the cart A, and a support part 4b which is horizontally suspended on the upper end of the leg part 4a. A pair of front and rear guide frames 5, 5 are erected on the portion 4b. Both guide frames 5, 5 are provided with trunnions 10, 10, which will be described later.
The guide surfaces 5', 5' are formed on the corresponding surfaces of the guide surfaces 5' and 5'. The same guide surface 5',
5' is provided with an appropriate inclination angle so that the distance between the two guide frames 5, 5 becomes narrower from the tip toward the base (toward the support base 4b).

In one of the two support stands 4, 4, the support stand portion 4b has both guide frames 5,
A through hole 11 of a connecting tube 14, which will be described later, is located approximately in the middle between the legs 4a, and a support rod 12 is horizontally suspended between the adjacent leg pieces 4a', 4a' of the leg part 4a. , the cylinder mechanism 13 is attached to the support rod 12.
is supported so as to extend in the vertical direction. That is, a cylinder tube 13a constituting the cylinder mechanism B is supported on the support rod 12 so as to be able to freely rotate in the longitudinal direction of the support base 4, and a piston rod 13b is connected to the support base 4 from the cylinder tube 13a. The trunnion 10 is operated in a state where the trunnion 10 is supported with respect to the trunnion 4, thereby extending upwardly. The aforementioned connecting tube 14 is provided at the tip of the piston rod 13b so as to project upward through a joint 15 so as to be freely rotatable across the width of the support base 4. The connecting tube 14 is formed into a long cylindrical shape with a diameter smaller than that of the through hole 11 so that it can be inserted into the through hole 11, and a ring-shaped gasket is attached to the head of the connecting tube 14. 16 is fitted. A gas supply passage 17 is cut in the connecting tube 14 along its longitudinal direction, one end of which is open so as to face the head, and the other end open so as to face the base. A supply pipe 18 whose one end is connected to an inert gas supply device (not shown) is connected to the opening on the base side.

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, 10 are protruded from the side walls thereof. . Both trunnions 10, 10 are 180 such that they can be supported on the support bases 4b, 4b.
It is installed protrudingly with a displacement angle of 100 degrees. Inert gas is supplied to one of the two trunnions 10, 10, that is, the trunnion 10 located on the side corresponding to the support base 4 that opens the through hole 11 of the connecting tube 14 as described above. A hole 6 is drilled. One opening of the supply hole 6 is the through hole 1.
It opens downward so as to face 1. A holder 7 for the connecting tube 14 is formed in the opening, and the holder 7 is approximately bell-shaped with an appropriate taper so that the diameter gradually increases toward the opening. On the other hand, a supply pipe 8 is connected to the other opening of the supply hole 6 . The supply pipe 8 is connected to a porous plug 9 provided at the bottom of the ladle B.

FIG. 8 to FIG. 10 are drawings showing the second embodiment, in which of the pair of left and right support stands 4, the support stand 4 is located on the side corresponding to the trunnion 10 provided with the holder 7. A support rod 19,
20 is horizontally suspended in two stages, upper and lower. Both support rods 1
9 and 20 have through holes 19' and 2 at positions corresponding to the upper and lower phases.
0' is opened, and a guide rod 21 is inserted between the through holes 19' and 20' so as to extend vertically. The guide rod 21 is provided with a ball bearing 25 located near its lower end. That is, the guide rod 21 is provided so that its upper end portion can rotate in any direction via a ball bearing 22.
A connecting tube 14 is provided at the upper end thereof to protrude upward. A spring 22 is interposed between the connecting tube 14 and the support rod 19, and the connecting tube 14 normally penetrates through the through hole 11 via the spring 22 and passes through the support base portion 4.
It is provided so as to be in a biased state so as to protrude upward from b.

The third embodiment shown in FIGS. 11 and 12 is an applied embodiment of the first embodiment, in which a trunnion 10 which opens a supply hole 6 in a pair of left and right support stands 4, 4 is a third embodiment shown in FIGS. At the support base part 4b of the support base 4 located on the side corresponding to the support base part 4b,
A cover 23 is placed at the lower end of the through hole 11 which is opened to cover the through hole 11 .
The cover 23 is made of a stretchable and deformable material such as rubber, and a plurality of notches 24 are formed in the center of the cover 23 in the radial direction so that the connecting tube 14 can pass through the cover 23. It will be established over the period.

Next, its effect will be explained.

In the first embodiment shown in FIGS. 1 to 7, FIG. 6 shows a state in which the ladle B is not mounted on the truck A, that is, the ladle B has a trunnion 10 attached to the support base portion 4b.
This is a drawing showing a state in which the trunnion 10 is not supported on the support base portion 4b and is lifted up via the crane mechanism C. In this state, the connecting tube 14 is Through hole 1
It is in a state of being lowered to a position below the upper end opening of No. 1. And for the connecting tube 14, the connecting tube 1
In this state, air can be sent in to prevent clogging of the supply passage 17 that opens at 4.

In a state where the connecting tube 14 has the above-mentioned effect, by lowering the crane mechanism C that engages the trunnion 10 from its hanging position, the trunnions 10, 10 are moved to the guide frames 5, 5.
It is placed on the support base parts 4b, 4b through the guiding action of. That is, as shown in Figs. 1 and 2, the trolley A
A state is obtained in which ladle B is mounted on top.

In the state in which the trunnions 10, 10 are placed on the support bases 4b, 4b in this manner, the cylinder mechanism 13, which is activated by a signal from a terminal (not shown) (switches, phototubes, etc.) that detects this state, is activated. Through the expansion action of the piston rod 13b, the connecting cylinder 14 projects from the through hole 11 onto the support base 4b and is fitted into the holder 7 which is open to the trunnion 10 side, and its head is inserted into the holder 7 through the packing 16. A state of pressure contact with the inner wall surface is obtained. That is, as shown in FIG. 7, a state is obtained in which the supply passage 17 on the connecting tube 14 side and the supply hole 6 on the trunnion 10 side communicate with each other. Then, in a state where the connection between the connecting tube 14 and the holder 7 has been established, an inert gas such as argon or nitrogen is fed from the gas supply device instead of the air that has been fed into the connecting tube 14 up until now. It will be done. That is, the inert gas sent out from the gas supply device is supplied to the supply pipe 18, the connection tube 14, the holder 7, the supply hole 6,
It will be fed into the ladle B via the supply pipe 8 and the porous plug 9. By feeding the inert gas into the ladle 13 in this manner, an effect of stirring the molten steel can be obtained. Incidentally, as shown in FIG. 5, the width dimension between the guide frames 5, 5 protrudingly provided on the support base part 4b is the width dimension between both guide frames 5, 5 when the trunnion 10 is placed on the support base part 4b. 5, so that the holder 7 on the trunnion 10 side is connected to the through hole 11 on the support base part 4b side by the amount of the gap. This will cause a positional shift between the cylinder tube 13 and the support rod 12.
This can be absorbed by rotating the connecting cylinder 14 in any direction at the pivot portion a and the joint 15 at the tip of the piston rod 13b.

In the second embodiment shown in FIGS. 8 to 10, FIG. 9 shows a state in which the ladle B is lifted up via the crane mechanism C, that is, the support base portion 4b of the support base 4.
This drawing shows a state where the trunnion 10 on the ladle B side is not supported, and in this state where the trunnion 10 is not supported on the support base portion 4b, the connecting tube 14 is attached to the spring 22. Due to the biasing action, its head is projected upward from the support base portion 4b through the through hole 11. Similarly to the first embodiment, air can be fed into the supply passage 17 provided in the connecting tube 14 for the purpose of preventing clogging of the supply passage 17. Thus, in a state where the connecting tube 14 protrudes above the support base portion 4b and the air feeding action as described above is obtained, the ladle B is lifted up via the crane mechanism C that engages with the trunnion 10. By lowering the trunnions 10, 10 from the position, the trunnions 10, 10 are placed on the support bases 4b, 4b through the guiding action of the guide frames 5, 5. In this way, the trunnions 10, 10
is lowered and placed on the support bases 4b, 4b, the head of the connecting tube 14 is fitted into the holder 7, and the connecting tube 14 is forcibly lowered against the biasing pressure of the spring 22. By doing so, a state is obtained in which the head of the connecting cylinder 14 comes into pressure contact with the inner wall surface of the holder 7 via the packing 16. That is, as shown in FIG. 10, when the trunnion 10 is supported on the support base portion 4b, the supply passage 17 on the connecting cylinder 14 side
A state is obtained in which the supply hole 6 on the trunnion 10 side communicates with the supply hole 6 on the trunnion 10 side.

Further, in the third embodiment shown in FIGS. 11 and 12, FIG. 11 shows a state in which the trunnion 10 is not supported on the support base portion 4b, that is, the connecting tube 14 is lowered downward from the through hole 11. This drawing shows the state in which the cover 2 stretched over the lower end of the through hole 11 is
3 has its notches 24... in a closed state.
Since each notch 24 is in a closed state in this way, the cover 23 acts to prevent dust from falling to the connecting tube 14, that is, prevents clogging of the supply passage 17 caused by the dust. This effect can be obtained. In addition, by pushing up the connecting cylinder 14 upward through the cylinder mechanism 13 while the trunnion 10 is supported on the support base 4b, the connecting cylinder 14 penetrates through the cover 23, and the connecting cylinder 14 is moved through the cover 23, and the connecting cylinder 14 is moved upwardly through the cylinder mechanism 13. Similarly, the effect of pressing against the holder 7 on the trunnion 10 side can be obtained.

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 trunnion side so that the holder formed at the opening faces the trunnion support base, and an inert gas supply device is provided on the trunnion support base side. A connecting tube that communicates with the trunnion is provided so that it can move forward and backward, and when the trunnion is supported on the support base, the connecting tube is connected by pressing its head against the holder through the pressing action of the vertical movement of the connecting tube. By providing the connection in such a way as to obtain the desired state, the connection can be made more quickly and safely than in the conventional manual connection operation. Since the connection can be made quickly in this way, it has become possible to prevent clogging of the porous plug.

[Brief explanation of drawings]

1 to 7 are drawings showing the first embodiment, in which FIG. 1 is a plan view showing a state in which the ladle is mounted on a truck, FIG. 2 is a side view of the same, and FIG. FIG. 4 is a front view of the ladle, FIG. 4 is a plan view of the support base, FIG. 5 is a partially cutaway enlarged view of the trunnion support, and FIGS. 6 and 7 are enlarged views of the trunnion support showing the operating state. be. 8 to 10 are drawings showing the second embodiment, in which FIG. 8 is a partially cutaway enlarged view of the trunnion support, and FIGS. 9 and 10 are the same trunnion support showing the operating state. It is an enlarged view of. 11 and 12 are drawings showing the third embodiment, in which FIG. 11 is an enlarged view of the trunnion support, and FIG. 12 is a plan view of the cover. A...Dolly, B...Ladle, C...Crane mechanism, 1...Wheel, 2...Rail, 3...Through hole,
4... Support stand, 4a... Leg part, 4b... Support stand part, 4a'... Leg piece, 5... Guide frame, 5'... Guide surface, 6... Supply hole, 7... Holder, 8...
Supply pipe, 9... Porous plug, 10... Trunnion, 11... Through hole, 12... Support rod, 1
3... Cylinder mechanism, 13a... Cylinder tube, 13b... Piston rod, 14... Connection tube, 15... Joint, 16... Packing,
17... Supply passage, 18... Supply pipe, 19,
20...Support rod, 19', 20'...Through hole, 21...
...Guide rod, 22...Spring, 23...Cover, 2
4...notch, 25...ball bearing.

Claims (1)

[Scope of Claims] 1. In a refining vessel such as a ladle having a porous plug on the bottom or side wall and a trunnion on the side wall, a supply hole communicating with the porous plug is formed on the trunnion side at the opening thereof. The holder is provided so as to face the support base of the trunnion, and a connecting tube that communicates with the inert gas supply device is installed on the support base side of the trunnion. A connection mechanism for a gas supply pipe for gas bubbling in a refining vessel such as a ladle, the head of which is movable up and down so as to come into pressure contact with the holder. 2. Connection of a gas supply pipe for gas bubbling in a refining vessel such as a ladle according to claim 1, wherein the connecting tube is provided so as to be movable up and down by a cylinder mechanism that operates in a state in which the trunnion is supported on the support base. mechanism. 3. A gas supply pipe for gas bubbling in a refining vessel such as a ladle according to claim 1, wherein the connecting tube is provided so as to be movable up and down by a spring mechanism that is biased when the trunnion is supported on the support stand. attachment mechanism.