JPS6327893Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heat retention device for a pot that stores molten metal.

[Prior art and its problems]

For example, in the steel industry, a ladle that receives molten steel from a converter is transported by an overhead crane to a continuous casting facility, where the molten steel is poured. At this time, a method is used to prevent heat loss by attaching a heat-retaining lid over the pot, but once casting is complete, the heat-retaining lid is immediately removed, the slag inside the pot is discharged by tilting, and the porous plug is removed. etc., and are transported to the hotpot maintenance stand for maintenance.

From the perspective of energy conservation and the lifespan of the pot lining refractories, it is desirable to install a heat-retaining lid when moving from the converter to the continuous casting equipment, when removing slag, and during pot maintenance. This has not been realized because it is difficult to hold the lid.

As a countermeasure, for example, as in the device described in Utility Model Application Publication No. 56-160654 or No. 56-14959, a fixing hook is provided on the pot side, and the heat-retaining lid is attached and removed by hanging it with a crane. Although there is a method, it has many drawbacks, such as the shaking of the overhead crane making it extremely difficult to attach and detach from the fixed hook, and as a result, the refractory installed on the underside of the heat insulating lid is damaged by the impact when attaching and detaching.

In addition, a sub-lid mechanism is installed at the tip of the heat-retaining lid to prevent slag collision when tilting, but since a hinge is used, it will not open unless the tilting angle is 90 degrees or more. The problem is that it is actually useless.

[Purpose of invention]

This invention is equipped with a hook operated by a link mechanism on the pot body, which moves forward and backward via the pot holder on the pot trolley, making it easy to attach and detach the heat-retaining lid, and also allows the small lid to be hung at an angle. The purpose of the present invention is to solve the above-mentioned drawbacks by providing a pot heat retaining device that allows the small lid to be opened at a tilt angle of 90° or less by providing a metal fitting on the heat retaining lid.

[Structure of the idea]

In order to achieve this purpose, the pot heat retention device of the present invention includes a removable heat retention lid that closes the opening of the pot, and a heat retention lid that is rotatably provided on the pot and that is attached to an engaging portion of the heat retention lid. The pot is provided with a link shaft which is movable up and down and which contacts the pot holder and receives a lifting force when the pot is placed on the pot holder. The present invention is characterized by comprising a link arm mechanism that converts the vertical movement of the hook from a lowered position to a raised position into a rotational movement of the hook from an engaged state to a disengaged state with respect to the engaging portion.

The heat-retaining lid may include a small lid at the spout, and the small lid may be pivotally connected to the heat-retaining lid above the surface of the heat-retaining lid so as to be openable and closable.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

1 and 2 are a side view and a plan view showing the outline of the device according to the present invention, in which 1 is a pot, 2 is a pot truck, 3 is a pot holder, 4 is a heat-retaining lid, and 5 is a pot crane. 6 is a hook for hanging a crane for opening and closing the thermal insulation cover, 7 is a small lid, 8 is a hinge that pivots the base end of the small lid, and 9 is attached to the thermal insulation lid 4. The trunnion includes a trunnion guide 10, a hook 11 that engages with the trunnion 9, and a link mechanism 12 that causes the hook 11 to engage and disengage from the trunnion 9.

This link mechanism 12 includes a first link arm 13 whose intermediate portion is pivotally connected to the pot 1, as shown in FIG.
and a second link arm 14 that connects the distal end of the first link arm and the base end of the hook 11.
and a link shaft 15 whose distal end is loosely engaged with the base end of the first link arm 13 and moves up and down when the distal end comes into contact with the pot holder 3 of the pot truck 2. In the natural lifted state, the link shaft 15 is pressed down by the spring 16, and in this state, the hook 11 is attached to the trunnion 9.
is configured to engage. In addition, 17 is a lift guide for the link shaft 15, 18 is a stroke adjustment joint of the link mechanism, 19 is a spring adjustment fitting, and 20
is an elevating metal fitting provided on the link shaft tip 15a.

The operation of the device having such a configuration will be explained. When the pot 1 is placed on the pot truck 2 using a pot crane, the link shaft tip 15a on the lifting fitting is pushed up, and the link shaft 15 is moved to the link arms 13, 14.
is moved, the hook 11 is moved back, and the heat retaining lid 4 can be placed on it. It receives molten steel in this state. The stroke adjustment of the hook 11 at this time is as follows:
Stroke adjustment joint 18 or spring adjustment fitting 1
9.

Immediately after the tapping is completed, the heat-retaining lid 4 is placed on the ladle 1 by a crane to start heat-retaining. At this time,
The trunnion 9 of the heat retaining lid 4 can easily maintain its positional relationship with the hook 11 by means of a trunnion guide 10 installed on the pot side.

Next, when the pot crane lifts the pot 1 from above the pot cart 2, the lifting bracket 20 separates from the pot holder 3, so the spring force causes the link shaft tip 15a to return to the position before placing the pot 1 on the cart 2. After returning, the hook 11 moves forward and engages with the trunnion 9 of the heat-retaining lid 4, so that the heat-retaining lid 4 is held so as not to fall off when the pot 1 is tilted thereafter.

When discharging the slag in the pot 1, the heat retaining lid trunnion 9 is held on the hook 11, and there is no problem even if it is tilted by more than 90 degrees. Furthermore, since the small lid 7 installed at the tip of the heat-retaining lid is pivoted above the heat-retaining lid, the tilting angle can be adjusted as shown in Fig. 4.
It can be opened even within 90 degrees, making it easy to prevent discharge slag from colliding with the heat-insulating lid, minimizing wear and tear on the refractory of the heat-insulating lid, and reducing maintenance costs.

[Effect of idea]

As mentioned above, according to the present invention, it is extremely easy to attach and detach the heat insulating lid, which not only provides sufficient heat retention effect, but also improves the efficiency of the production process by shortening the attachment and detachment time. It is effective.

[Brief explanation of the drawing]

Figure 1 is a side view showing the outline of the invention, Figure 2 is its plan view, Figure 3 is an enlarged view of the link mechanism, and Figure 4 shows the small lid open when the pot is tilted. It is a schematic diagram. 1... Pot, 2... Pot trolley, 3... Pot holder, 4...
... Heat retention lid, 5 ... Pot crane hanging shaft, 6 ... Hook, 7 ... Small lid, 8 ... Hinge, 9 ... Trunnion, 10 ... Trunnion guide, 11 ... Hook, 12 ... Link mechanism , 13... First link arm, 14... Second link arm, 15... Link shaft, 16... Spring, 17... Lifting guide, 18
...Stroke adjustment joint, 19...Spring adjustment fitting, 20...Lifting fitting.

Claims (1)

[Claims for Utility Model Registration] 1. A removable heat-retaining lid that closes the opening of a pot, and a hook that is rotatably provided on the pot and that engages and disengages from the engaging portion of the heat-retaining lid. and
The pot is provided with a link shaft which can be raised and lowered freely by contacting the pot holder and receiving a lifting force when the pot is placed on the pot holder, and the link shaft moves up and down from a lowered position to a raised position. . A pot heat retention device comprising a link arm mechanism that converts the rotation movement of the hook from an engagement state to a disengagement state with respect to the engagement portion. 2. The heat-retaining lid has a small lid at the spout, and the small lid is pivotally attached to the heat-retaining lid above the surface of the heat-retaining lid so that it can be opened and closed. A pan heat retention device according to claim 1 of the utility model registration claim characterized by: