JPS605973Y2 - Ladle lid holding device for molten steel ladle - Google Patents

Description

[Detailed description of the invention] The present invention is a pot lid holding device that is placed on the upper opening of the molten steel ladle used for out-of-furnace processing and ingot injection. In particular, the pot lid formed with a small lid can be easily attached and removed, and even if the pot is tipped over or tilted, the pot lid will not fall off and only the small lid will open.

Conventionally, pot lids have been used for steel receiving pots to prevent heat radiation from molten steel.

However, since these pot lids need to be removed when drawing lines outside the furnace or processing molten steel, special lid removal devices and evacuation devices are provided along the movement trajectory of the ladle.

However, when removing molten steel or removing molten slag remaining in the ladle, it may be desirable to leave the pot lid attached.

For example, in ingot injection or continuous casting of molten steel, the injection nozzle provided at the bottom of the ladle is opened and molten steel is injected.
The pot lid remains attached for heat retention.

Further, once such pouring is completed, it is necessary to drain the slag, and in this case as well, it is desirable to leave the pot lid attached in order to maintain heat.

By the way, in processing the slag, the ladle is either lifted up or tilted and overturned in the same position to pour the slag into the ladle car. If it is not engaged, it will fall off.

Therefore, it is necessary to moor the pot lid and ladle when removing slag, and various hooking and mooring methods have been proposed, but they require time and effort to attach and detach the pot lid, or require special procedures to attach the pot lid. Nothing was completely satisfactory, such as requiring a change of direction.

Therefore, the present invention provides a holding device that allows the pot lid to be simply placed horizontally, and in which the pot lid automatically engages with the ladle when the ladle is tilted or falls. Only the small lid provided on the pot lid is configured so that it can be opened and drained by tipping over.

The structure of the present invention, which is distantly related to the above object, is that retaining devices are provided respectively corresponding to the four corners of the upper outer circumference of the ladle and the four corners of the pot lid. It is formed by a retaining support shaft protruding through the bracket, and has a vertical groove on the other side that receives and supports the engagement support shaft, and a retaining shaft that is bent in a reverse direction to at least one side at the end of the vertical groove. The mooring protrusion is provided with a fitting groove consisting of a stop groove, and the engaging support shaft is fitted into each fitting groove to prevent the pot lid from falling off even if the ladle is tipped over. The gist is what has been constructed.

The present invention will be described in detail below based on the drawings, but the drawings show one example of a specific implementation of the present invention, and the present invention is not limited to these illustrated examples, but can be modified in accordance with the spirit of the above and later descriptions. The same effect can be achieved even by changing the shape of the component parts or changing a part of the design.

Furthermore, the embodiments described in the claims for utility model registration do not limit the present invention.

Figure 1 is a plan view of the installation of a ladle and pot lid using the present invention;
FIG. 2 is a side view of FIG. 1, and FIG. 3 is a side view seen from the left side of FIG. 1, showing a part of the right half.

In these figures, reference numeral 1 designates a ladle, a trunnion band 2 is provided at the upper center of the ladle, and trunnion shafts 3, 3 are fixed to opposing positions of the band 2.

Further, the upper edge 4 of the ladle 1 corresponds to the periphery of the opening, and is thick and shaped.

Reference numeral 5 denotes a pot lid, which is shown as a simple thick plate in the figure, but it is usually made of a lid body laminated with appropriate heat insulating material or with such heat insulating material inside.

In particular, the pot lid 5 used in the present invention has a small M6 formed on one end thereof, and hinges 6a, 6 at the upper part of one side of the small lid 6.
It is connected to the pot lid 5 by a.

Note that this hinge 6a is provided so that it can rotate freely.

Reference numeral 7 denotes a supporting shaft fixedly arranged opposite to the circumferential surface of the pot lid 6, and is supported by a pot lid attaching/detaching device.

The pot lid configured in this manner is placed on the ladle, and the holding device of the present invention is designed to hold the ladle so that it will not fall off even if it tilts or falls, so these engaging means are It can be freely selected and provided in the combination of the pot lid side and the ladle side.

That is, FIGS. 1 to 6 show an embodiment in which the engagement support shaft is provided on the pot lid side. FIG. 9 shows an embodiment in which the engagement support shaft is provided on the ladle side.

First, according to the former embodiment, brackets 8 are provided at four corners of the lower surface of the pot lid 5 so as to project toward the outer circumference.

Although the brackets 8 may be attached individually, it is common to fix them two by two or all four brackets to be connected to each other via a connecting plate 8a as shown in the figure.

Further, in a portion projecting from the outer periphery of the pot lid 5, two side walls projecting downward are formed, and an engaging support shaft 9 is fixedly installed across the both side walls.

On the other hand, on the ladle side, mooring protrusions 10 are fixed at the upper edge 4 so as to correspond between the side walls of the bracket 8.

Although the figure shows these mooring protrusions 10 welded to the upper edge 4, the design can be changed freely, such as by providing leg plates on the mooring protrusions 10 and screwing them onto the upper edge 4. .

A fitting groove for the engagement support shaft 9 is formed in the mooring protrusion 10.

FIG. 4 is a structural explanatory diagram showing the structure of these mooring protrusions 10 and their relationship with the engagement support shaft 9 provided on the pot lid 5, and shows only the essential parts by enlarging a part of FIG. 2. be.

That is, the fitting grooves formed in the mooring protrusion 10 are formed by a vertical groove 11 and a locking groove 12, respectively, and the locking groove 12 is formed by the vertical groove 11.
The bottom side of the pot lid 5 is bent toward the small lid 6 side and is formed to be inclined upward (reverse direction).

In addition, on the sides of these fitting grooves, when the vertical groove 11 is maintained in an almost vertical state, the vertical groove 11 is opened, and the vertical groove 11 is tilted and overturned (accompanied by the tilting and overturning of the ladle). Sometimes, a pendulum-type locking piece is provided that works to prevent the fitted engagement support shaft from slipping out.

That is, reference numeral 13 indicates a locking piece on the locking groove side, and reference numeral 14 indicates a locking piece on the vertical groove side, and the upper portions of these locking pieces 13 and 14 are rotatably supported on the mooring protrusion 10.

Reference numeral 15 denotes a stopper for the longitudinal groove side locking piece 14, which is implanted in the mooring protrusion 10.

FIG. 6 is an explanatory diagram showing a part of these relationships, in which the pot lid 5 is positioned on the upper part of the ladle 1, and the engagement support shafts 9 fixed to the bracket 8 are connected to the mooring protrusions 10, respectively. When lowered to match the vertical grooves 11, since the openings of the vertical grooves 11 are enlarged, the holding shafts 9 descend along the vertical grooves 11 and hit the bottoms as shown in FIG. is retained.

In this state, the pot lid 5 covers the upper opening of the ladle 1 to prevent heat radiation, and during ingot injection, the ladle 1 with the pot lid 5 attached is transferred to a crane or another pouring cart. be done.

When the pouring is finished, the molten slag is taken out as described above, but when removing the slag, the ladle with the pot lid 5 still attached must be moved by a crane and tilted and overturned, or the trunnion shaft must be placed on another cart. While supporting it, it tilts and falls over.

That is, FIG. 7 shows the ladle tilted at about 45 degrees, and the engagement support shaft 9 slides down toward the locking groove 12 due to the gravity of the pot lid 5.

Next, when the ladle is overturned, the engaging support shaft 9 will move as shown in FIG.
is supported at the tip side (lower end side in this state) of the locking groove 12, and the pot M5 is supported by each of the locking protrusions 10.

In the second overturned state, the small lid 6 formed on the pot lid 5 opens via the hinge 6a due to its own weight, and the slag can be discharged with the pot lid 5 attached.

In this state, the pendulum type locking piece 14 engages with the pivot portion of the locking piece 13 on the other side and serves to prevent the engagement support shaft 9 from slipping out of the vertical groove 11. It acts as a safety device in case the engagement support shaft 9 does not slide down into the locking groove 12 reliably.

On the other hand, the pendulum type locking piece 18 on the other side locks the engagement support shaft in the vertical groove 11 so that it does not escape when the ladle 1 tilts in the opposite direction. The locking piece 13 swings to close the vertical groove 11 and engages with the pivot portion of the locking piece 14.

In these embodiments, the engaging support shaft 9 is provided on the pot lid side, but the present invention can be implemented in the same way even if these are configured in reverse as described above.

FIG. 9 is an explanatory diagram showing an example of this, in which a mooring protrusion 10a is formed on the pot lid side, and this is attached in the same manner as the above-described attachment of the bracket 8.
Formed in a protruding corner.

A fitting groove similar to that of the above example is formed in the opposite direction on the mooring protrusion 10a, and a *groove 11a and a locking groove 12a are formed.

Further, the pendulum-shaped locking pieces 13a and 14a are each formed with an engaging portion whose lower end is bent in the direction of the longitudinal groove, and are pivoted in the same manner as described above.

On the other hand, regarding the engagement support shaft 9 provided on the ladle side, protrusions 8a, 8a are fixed to the upper edge 4 of the ladle in place of the bracket 8,
It is fixedly installed across the projecting piece 8a.

Even with this configuration, the same effects as in the above example can be achieved.

Note that in the above example and this example, the mooring protrusion 10, le
The pendulum type locking pieces provided in Fig. a are all shown as being pivoted on the sides of the projecting pieces, but as shown in Fig. 10, mounting grooves 16 and 17 for the pendulum type locking pieces are formed in the projecting pieces. The locking pieces may each be pivotally supported by the shaft 18, and when formed in this way, the fitting between the locking protrusion 10 and the bracket 8 can be made smooth.

Since the pot lid holding device of the present invention is constructed in this way, ■ it can be engaged simply by lowering the pot lid into the ladle opening while holding it almost horizontally, and it will not fall off even if the ladle is tilted or falls over. There is no.

■ No special securing and locking operations are required.

■ It is possible to securely engage and hold the object, and the purpose can be achieved with a simple structure.

You can enjoy benefits such as:

[Brief explanation of the drawing]

Figure 1 is a plan view of a ladle and pot lid using the present invention, Figure 2
The figure is a lower side side view of Figure 1, Figure 3 is a partial right side view of Figure 1, Figure 4 is an enlarged explanatory view showing the structure of the holding device, and Figure 5 is an explanatory cross section showing the engaged state. 6 is an explanatory diagram of the holding device, FIGS. 7 and 8 are explanatory diagrams of the operation of FIG. 5, and FIG. 9 is an explanatory diagram of another embodiment of the present invention.
FIG. 0 is an explanatory sketch showing another embodiment of the constituent members. 4... Upper edge of ladle, 5... Pot lid, 6... Small lid, butt... Bracket, 9... Engagement support shaft, 10... Mooring protrusion, 11... Vertical groove, 12...Latching groove, 13, 14...
...Pendulum type locking piece.

Claims (4)

[Scope of utility model registration request] (1) A holding device for a ladle lid with a small lid placed on the upper opening of a molten steel ladle, and an engaging device provided corresponding to the four upper corners of the outer circumference of the ladle and the four corners of the ladle lid. , one side is formed with an engagement support shaft protruding through the bracket, the other side is a vertical groove in which the engagement support shaft is received and supported, and the end of the vertical groove extends backward to at least one side. A molten steel ladle characterized in that it is formed of a mooring protrusion provided with a fitting groove formed of a locking groove bent in a direction, and the engaging support shaft is configured to fit into each fitting groove. pot lid holding device. (2) Utility Model Registration Scope of Claim 1. A pot lid holding device for a molten copper ladle, wherein the engaging support shafts are provided at four corners of the pot lid. (3) In claim 1 or 2 of the utility model registration, a pendulum-type locking piece is swingably supported on the side of the vertical groove formed in the mooring protrusion, so that the ladle does not fall over or turn upside down. A ladle lid holding device for a molten steel ladle, which is constructed to prevent the engagement shaft from coming off when it is tilted. (4) In claim 3 of the utility model registration claim, the pendulum type locking piece provided on the mooring protrusion is a molten steel ladle which is pivotably supported in a groove formed in the mooring protrusion. Pot lid holding device.