JPS587909B2 - Denkironioker Robotaichigimesouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a furnace lid positioning device for an electric furnace for adjusting the position of the furnace lid when replacing the furnace lid.

Normally, the refractory material in the lid of an electric furnace wears out, so it is replaced with a new lid after a certain number of melting cycles.

This furnace lid replacement work is completed by removing the old furnace lid, placing the new furnace lid on top of the furnace shell using a crane, and connecting the furnace lid with the hanging rods installed at four locations on the furnace lid suspension beam. do.

At this time, if the furnace lid is not placed in the correct mounting position with respect to the furnace shell, it will be difficult to connect it with the hanging rod, but it is extremely troublesome to finely adjust the position of the furnace lid by operating a crane, and it is difficult to work at heights. Therefore, the burden on the workers is also heavy.

The purpose of this invention is to eliminate the above-mentioned conventional drawbacks and provide a device that can quickly and reliably position the furnace lid during furnace lid replacement work. are connected by a flexible link, and the furnace lid is balanced in a normal relationship position when suspended from the furnace lid suspension beam via the flexible link.

An embodiment of the present invention will be described below with reference to the drawings. One end of a flexible link 3 is connected to four hanging ears 2 projecting from a roof hanging beam 1.

The flexible link 3 consists of a main body 3a made of a chain, wire rope, etc., and a hanging fitting 3b.

On the other hand, four hanging ears 5 are also provided protruding from the furnace lid 4.

The four hanging ears 2 and the four hanging ears 5 are each in the same horizontal plane,
Perpendicular center lines B-B and C-C in FIG.
Four flexible links 3 are provided at symmetrical positions with respect to
have the same length.

The furnace lid replacement work using this device is performed in the following order.

b) Release the connection between the old furnace lid and the hanging rod 6, and rotate the furnace lid suspension beam 1 upward by the lifting and turning mechanism 7 to the position shown in chain lines in FIG.

b) Remove the old furnace lid with a crane and replace the new furnace lid 4 with the furnace shell 8.
Place it on top of the camera near the normal mounting position.

In this state, there is some misalignment and rotational misalignment of the furnace lid.

c) Turn the furnace lid hanging beam 1 back to the solid line position in Figure 2, lower it, and attach the hanging fitting 3b of the flexible link 3 to the hanging ear 5 of the furnace lid.
to engage.

2) When the furnace lid suspension beam 1 is raised, the furnace lid 4 is lifted up via the flexible links 3, but due to the position of each hanging ear 2, 5 and the length of the flexible links 3, The lid 4 is in the normal position relative to the furnace shell 8 (with no misalignment or rotational misalignment)
The equilibrium state is reached at .

(Fig. 3) E) When the furnace lid hanging beam 1 is lowered, the furnace lid 4 is placed in the proper mounting position on the furnace shell 8, so finally the furnace lid 4 and the hanging rod 6 are connected.

Note that the arrangement of the hanging ears 2 and the hanging ears 5 and the length of the flexible link 3 do not necessarily have to be according to the configuration in the above embodiment. The structure may be such that the furnace lid 4 suspended by the beam 1 is balanced in a normal relationship position with respect to the furnace shell 8.

In addition, if the hanging ears 2 and 5 are arranged so that each flexible link 3 is inclined toward the furnace core when the furnace lid 4 is suspended in an equilibrium state, an equilibrium state can be achieved in a short time when the furnace lid is lifted. reach

Since this invention has the above-mentioned configuration, the structure of the device is simple and inexpensive to manufacture, and the furnace lid can be quickly and reliably moved by the simple operations of engaging the flexible links and raising and lowering the furnace lid hanging beam. Positioning is possible and the burden on the worker is reduced.

[Brief explanation of drawings]

1 is a side view of the positioning device according to the present invention when it is not in operation, FIG. 2 is a plan view thereof, and FIG. 3 is an enlarged side view of section A in FIG. 1 when the positioning device is in operation. 1... Furnace lid hanging beam, 3... Flexible link, 4... Furnace lid, 8
...The hearth.

Claims (1)

[Claims] A furnace lid is provided with a plurality of flexible links 3 removably extended between a furnace lid suspension beam 1 and a furnace lid 4, and is suspended by the furnace lid suspension beam 1 via the flexible links 3. A furnace lid positioning device for an electric furnace, characterized in that the furnace lid positioning device 4 is balanced at a normal relative position with respect to the furnace shell 8.