JPS5919053A - Connection mechanism of gas supply pipe for gas bubbling in refining vessel such as ladle - Google Patents

Abstract

PURPOSE:To exchange quickly and safely an inert gas or the like to be supplied to a porous plug by providing a supply hole communicating with the porous plug in the trunnion part of a ladle for molten steel or the like and mounting a connection cylinder for supplying gas connecting to said supply hole. CONSTITUTION:A holder 7 having a gas supply port 6 communicating with a porous plug is mounted in the trunnion part 10 on the side face of a ladle B for molten steel having the porous plug in the bottom or side part. A conection cylinder 14 which is moved upward or downward with a cylinder mechanism 13 and is provided with a gas supply pipe 18 is mounted to the leg part 4a of a support base 4 for the trunnion 10. An inert gas such as Ar or N is exchanged and supplied quickly and safely to the porous plug from the gas supply device disposed in each refining position by using the above-mentioned connection cylinder 14 and the holder 7 and the refining work is accomplished without clogging the porous plug in the stage of moving the ladle in the refining position while feeding the inert gas from the porous plug into the molten steel contained in the ladle B.

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 container such as a ladle. The purpose is to carry out the process safely and efficiently.

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, an inert gas such as argon or nitrogen is blown into the bottom of the ladle or the like during the above-mentioned processes such as removal of slag, heating, and degassing. (Gas bubbling) By blowing inert gas into the molten steel in the ladle etc., the effect of stirring the molten steel is obtained.
Through the stirring action, the temperature of the molten steel is made uniform, the composition of the molten steel is made uniform, and the slag and the molten steel are brought into active contact to promote 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 slag, heating, degassing, etc. The gas supply device for gas bubbling is installed at each operating location because the operating location moves depending on the processing purpose. 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 depending on the manual operation.

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 porrus 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 advancing and retracting actions of the connecting tube, and the gist is that a supply hole communicating with the porous plug is provided on the trunnion side, and the opening thereof is A holder formed on the trunnion is provided so as to face the support base of the trunnion, and a connecting tube communicating with an inert gas supply device is provided on the support base side of the trunnion, the head of which is in pressure contact with the holder. It is constructed so that it can be moved forward and backward so that it can be inserted and inserted.

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 first embodiment shown in FIGS.
The third embodiment shown in FIGS. 1 and 12 will be specifically described.

In the first embodiment shown in FIGS. 1 to 7, (A)
is the wheel (11 (11, (+1 (11) through the rail (2
) is a trolley installed to be able to run on the same trolley (A
) is provided with a through hole (3). The through hole (3) is formed in a rectangular shape with an appropriate length so that the bottom of a ladle (B), which will be described later, can be inserted therethrough. Then, support stands (4) for the ladle (B) are placed along both sides of the through hole (3).
1 (41) are erected on the left and right opposite sides.The support stand (4) has a plurality of leg pieces (4a)'... and stands up from the cart (A). It consists of a support part (4b) that is suspended horizontally on the upper end of the leg part (4a), and the support part (4b)
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 a trunnion GO) (10) to be described later, and the corresponding surfaces thereof have a guide surface. (5)'(5)' is formed. The guide surface f5)'(5)' is an appropriate slope so that the interval between the guide frames f5) (5) narrows from the tip toward the base (toward the support base (4b)). It is provided with a corner.

In one of the two support stands (4H41), the support stand part (4b) has both guide frames (5).
(Connection tube 04, which will be described later and is located approximately in the middle between 51)
A through hole (11) is provided through the leg (4a), while a support punch (+2) is horizontally suspended between adjacent leg pieces (4aY (4a)'), and a support punch (+2) is provided in the support punch (121). A cylinder mechanism (I3) is supported so as to extend in the vertical direction.

That is, the cylinder tube (13a) constituting the cylinder mechanism (B) is supported on the support stand (I2) so as to be able to freely rotate in the longitudinal direction of the support stand (4). A piston rod (13b) is extendably extended upward from the tube (13a). At the tip of the piston rond (13b), the aforementioned connecting tube 04) is oriented upward so that it can freely rotate across the width of the support base (4) via the joint (151). It is installed protrudingly.

The connecting tube (14) is formed into a long cylindrical shape with a diameter smaller than that of the through hole (the old through hole so that it can be inserted into the ID), and its head is shaped like a ring. A gasket (16) formed in is fitted. In addition, a gas supply passage (17) is carved in the connecting tube (+41) along its longitudinal direction, one end of which is open so as to face the head, while the other end is 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) is provided protrudingly. both trunnions (oo) (10) c) the above support base (4b)
) (4b) is protruded with a displacement angle of 180 degrees so that it can be supported on. And both trunnions QO above
)Qo), one of the trunnions, 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 Oa as described above, is filled with inert gas. A supply hole (6) is drilled. One opening of the supply hole (6) is opened downward so as to face the through hole (11). And the connection tube (
+4) holder (to form the force, the holder (the force is formed approximately in a bell shape with an appropriate taper so that the diameter gradually increases toward the opening direction. A supply pipe (8) is connected to the other opening.

The supply pipe (8) is connected to a porous plug (9) provided at the bottom of the ladle (B).

Figures 8 to 10 are drawings showing the second embodiment, in which a pair of left and right support stands (41(4)) are located on the side corresponding to the holder (trunnion 00 having force). A support rod (19) extends between adjacent leg pieces (4a)'(4a)' in the support part (4b) of the support base (4).
) (20) is horizontally suspended over two levels, upper and lower. Both support holes θ■ (20) have through holes 09)' (20) at positions corresponding to the upper and lower phases.
)' is opened, and a guide l'l' (21) is inserted between the two passage holes (ll'(2[)') so as to extend vertically. A ball bearing (25) is provided near the lower end. That is, the guide rod (21) is provided so that its upper end can rotate in any direction via the ball bearing (221). A connecting tube 01 is provided at the upper end thereof to protrude upward.

There are two springs interposed between the connecting tube 0 and the support rod, and the connecting tube is always inserted through the through hole (marked) through the support base (4b) through the spring (22). It is provided so that it protrudes upward and is in a biased state.

The third embodiment shown in FIGS. 11 and 12 is an applied embodiment of the first embodiment, in which a pair of left and right support stands (41 (of 41, the supply hole (6) is opened). In the support part (4b) of the support part (4) located on the side corresponding to the trunnion 00), a cover is located at the lower end of the through hole (II) opening in the support part (4b). (23) is stretched so as to cover the through hole 01). Same cover (
23) is formed using a stretchable and deformable material such as rubber, and the center part of the cover (23) has multiple notches (24) so that the connecting tube Oa can pass through the cover +231.・are provided in the radial direction.

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) is supported by the trunnion (10). Base (4b)
This drawing shows a state in which the trunnion (1o) is not supported on the support platform (4b) and is lifted up via the crane mechanism (C), and the trunnion (1o) is not supported on the support base (4b) in this way. In this case, the connecting tube (141 is a through hole) is in a state of being lowered to a position below the upper end opening. The connecting tube Oa is in a state where air can be fed into the connecting tube Oa for the purpose of preventing clogging of the supply passage α7) that opens into the connecting tube Oa.

In a state where the above-mentioned action is obtained on the connecting tube α4), the trunnion (10) (+0) is lowered by lowering the crane mechanism (C) that engages with the trunnion GO) from its hanging position. The guide frame (5) is placed on the support platform (4b) (4b) through the guiding action of the guide frame (5). That is, a state is obtained in which the ladle (B) is mounted on the truck (A) as shown in FIGS. 1 and 2.

With the trunnions (10) (10) placed on the support bases (4b) (4b) in this way, the piston ronds (1, 3b) in the /linder mechanism (13)
), the connecting tube 04) protrudes above the support part (4b) from the through hole (Iυ), and the trunnion α0
) side is inserted into the holder (forced), and its head is pressed against the inner wall surface of the holder (forced) through the gasket (16).

That is, as shown in FIG. 7, a state is obtained in which the supply passage α force of the connecting cylinder enclosure communicates with the supply hole (6) on the trunnion 00) side. In this way, when the connection between the connection side and the holder (force) has been established, instead of the air that had been fed into the connection tube (+4) until now, an inert gas such as argon or nitrogen is supplied from the gas supply device. Gas is sent in. That is, the inert gas sent out from the gas supply device passes through the supply pipe α mark, connection tube 04), the holder (power, supply hole (6), supply pipe (8), and porous plug (9)). The inert gas is fed into the ladle (B). By feeding the inert gas into the ladle 03) in this way, an effect of stirring the molten steel is obtained. In addition, as shown in Fig. 5, the support part (4b
) The width dimension between the guide frames (5) (5) protruding above is the width between both guide frames (5) (5) when the trunnion (10) is placed on the support base (4b). Since the length of the trunnion 00) is slightly longer than the width of the trunnion 00) so that there is a gap between the
) side through hole αl), but the positional deviation is caused by the pivoting part of the cylinder tube (13a) and the tip of the piston rod (13b) with respect to the support punch (I2). This can be absorbed by rotating the connecting cylinder at the joint (151 part) in any direction.

In the second embodiment shown in FIGS. 8 to 10, FIG. 9 shows the ladle (B) lifted up via the crane mechanism (C), that is, the support base of the support base (4). It is a drawing showing a state in which the trunnion (10) on the ladle (B) side is not supported with respect to the support part (4b).
), when the trunnion (10) is not supported by the spring (2), the head of the trunnion (10) is attached to the support base (4b) through the through hole (11)' through the biasing action of the spring (2). The connecting tube (1
Similar to the first embodiment, air can be fed into the supply passage (I) provided in (A) for the purpose of preventing clogging of the supply passage (+7).

Thus, in a state where the connecting tube (I4) protrudes above the support base (4b) and the air feeding action as described above is obtained, the connection tube (I4) is moved through the crane mechanism (C) that engages with the trunnion QQ). By lowering the ladle (B) from its lifting position, the trunnion (tα00) moves to the support base (4b) (through the guiding action of the guide frame (5) (51).
4b), the trunnion (IOHIO) is lowered in this way, and the support part (4b)
(4b) As the connecting cylinder Oa is placed on the holder (221), its head is fitted into the holder (221
By being forcibly lowered against the urging pressure of
0, that is, the first state where a state of pressure contact with the inner wall surface of the force is obtained.
As shown in Figure 0, when the trunnion 00) is supported on the support base (4b), the supply passage 0 on the connecting tube 04) side
7) and the supply hole (6) on the trunnion 00) side are communicated with each other.

Further, in the third embodiment shown in FIGS. 11 and 12,
FIG. 11 shows a state in which the trunnion 00) is not supported on the support base (4b), that is, the connecting tube 04) is connected to the through hole (11).
) is a drawing showing a state in which the connecting tube Oa has descended downward from the through hole (II
) The cover (23) stretched over the lower end of the notch (
2. It is 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 into the connection tube (1), i.e., the supply hole caused by the dust. (1
7) The effect of preventing clogging can be obtained.

In addition, by pushing up the connecting tube (+4) upward via the cylinder mechanism (13) while the trunnion (10) is supported on the support base (4b), the connecting tube (1a) The effect of penetrating through the cover (2J) and pressing against the holder (force) on the trunnion (10) side is obtained as in the first embodiment.

The present invention is constructed as described above, and as described above, the supply hole communicating with the porous plug is formed on the trunnion side, and the holder, which is formed in the opening thereof, faces the supporting base of the trunnion and the opposite side. On the other hand, a connecting tube that communicates with the inert gas supply device is provided on the supporting stand side of the trunnion so that it can move forward and backward, and when the trunnion is supported on the supporting stand, the connection tube communicates with the inert gas supply device. By providing the connection state by pressing the head against the holder, the connection can be made more quickly and safely than 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 the drawing]

1 to 7 are drawings showing the first embodiment, and FIG. 1 is a plan view showing a state in which a ladle is mounted on a cart;
Figure 2 is a side view of the same, Figure 3 is a front view of the ladle, Figure 4 is a plan view of the support base, Figure 5 is a partially cutaway enlarged view of the trunnion support, Figures 6 and 7 are It is an enlarged view of the same trunnion support part showing an operating state. 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) Trolley, (B) Ladle, (C) Crane mechanism, (1)
Wheels, (2) rails, (3) through holes, (4) support stands, (
4a) Leg portion, (4b) support base portion, (4a)' leg piece, (5
) Guide frame, (5)' guide surface, (6) Supply hole, (Cap holder, (8) Supply pipe, (9) Porous plug, (
10) Trunnion, (mark hole, (I2) support hole, (
13) Cylinder mechanism, (13a) Cylinder cheep, (13b) Piston rod, ■ Connection tube, (I5) Joint, (16) Packing, Side supply passage, (18) Supply pipe, (19) (20) Support Hit, a spring'(20)'
Through hole, (21) guide punch, (22) spring, (23) cover, c2 notch, (25) ball bearing. Patent applicant: Daido Steel Co., Ltd. 1 Figure 2 Figure 3 Figure 7 Figure 9 Figure 10 Figure 12

Claims (3)

[Claims] (1) In a refining vessel such as a ladle that has a porous plug on the bottom or side wall and a trunnion on the side wall, a holder that has a supply hole in its opening that communicates with the porous plug on the trunnion side is the trunnion. The trunnion 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.
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 forward and backward so that it can be fitted into the holder in pressure contact with the holder. (2) A patent characterized in that the connecting tube is provided so as to be movable forward and backward via a cylinder mechanism, and is provided so as to be pressed against the holder via the cylinder mechanism when the trunnion is supported on the support base. A connection mechanism for a gas supply pipe for gas bubbling in a refining vessel such as a ladle according to claim 1. (3) The connecting tube is normally provided so as to be biased so as to protrude upward from the support base via a spring, and when the trunnion is supported on the support base, the spring bias is applied. 2. A connection mechanism for a gas supply pipe for gas bubbling in a refining vessel such as a ladle as set forth in claim 1, wherein the connection tube is provided so as to be brought into pressure contact with the holder through pressure.