JPS5940426Y2 - Converter bottom reversing device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for reversing the bottom of a bottom blowing converter, and in particular aims to reduce equipment costs by making it possible to use an overhead crane.

The bottom of a bottom-blown converter is usually removable and can be removed from the furnace body, and is usually circular, with refractories on the top and siding and piping equipment on the bottom.

During repeated blowing, the refractories in the bottom and siding of the converter are damaged, and the piping equipment and other parts also need repair, so it was decided to remove them from the converter main body and repair the bottom. Become.

Maintenance of this bottom often involves replacing damaged refractories and tuyeres with new ones, and in terms of productivity of the converter, it is necessary to perform the work quickly and accurately. Due to the nature of the work, JI'! , there is a difference.

Mechanization of a device with a drive source to reverse the bottom,
Although labor-saving measures have already been put into practical use, the inventors of the present invention conducted various studies to further reduce the equipment cost of converter reversing equipment, and as a result, they decided to replace it with a bottom reversing equipment equipped with a conventional mechanized drive source. Instead, we have been able to provide a converter bottom reversal device that utilizes overhead running lanes and has a low equipment cost.

The present invention is an apparatus that includes a holding frame for fixing and holding the converter bottom, and inverts the converter bottom via the bottom holding frame.

In other words, the bottom holding mechanism includes a circular bottom holding frame equipped with a bottom skirt holding part and a crane hanger, and the bottom is fixed to the skirt holding part of the holding frame, so that the bottom and the holding frame are held together as a whole. It consists of a plurality of tools and a means for converting.

Furthermore, in order to rotate the bottom and the entire holding frame, a pair of rotating shafts are provided on the holding frame eccentrically from the overall center of gravity.

In addition, in order to install such a rotating shaft so that it can move up and down, a pair of stands preferably made of metal and having a long hole, a first frame holder that supports the holding frame in the normal position, and a bottom. A second frame pedestal is provided on the opposite side of the frame pedestal for supporting the top end of the holding frame when the fixed holding frame is reversed through the overhead running lane. This is a furnace bottom reversal device.

It is preferable to attach vibration-proofing material to the tops of the two frame pedestals and the skirt support to absorb and protect the impact when the bottom is reversed or set.

Next, details of the configuration of the present invention will be explained with reference to the drawings showing preferred embodiments.

FIG. 1 is a side view of the device of the present invention, and FIG. 2 is a plan view.

Normally, the converter bottom has a refractory 1 on the top surface of the bottom plate 3.
The lower surface includes a skirt 2 for protecting the tuyeres and piping equipment, and hardware 4 for setting in the furnace body.

Since a rotation shaft for reversing the bottom cannot be provided on the bottom body, a bottom holding frame 5 equipped with a rotation shaft is provided as a separate frame for holding the bottom.

This bottom holding frame 5 is provided with a plurality of locking means 8 for fixing the skirt holding part 7 of the holding frame and the bottom plate 3, so as to hold the bottom when the holding frame is turned over. This is a mechanism that simultaneously reverses the

The bottom holding frame 5 has a circular shape in order to maintain its overall rigidity, and a hanging hand 9 is provided at one end of the bottom holding frame 5 so that it can be lifted by an overhead crane.

The bottom holding frame 5 to which the bottom is fixed is reversed around a pair of rotating shafts 6 provided on the bottom holding frame 5 at an eccentric position offset from the overall center of the bottom and the holding frame.

This rotating shaft is set in the long hole 11 of the stand 10 made on the foundation, and together with the first frame holder 12 supports the load of the holding frame and the bottom on the bottom in a normal state, and also when inverted. supports the load of the bottom holding frame and the bottom together with the frame holder 12 and the second frame holder 13 provided on the reverse side.

The elongated hole 11 provided in the stand 10 may be equipped with a metal 14 to ensure smooth sliding and vertical movement of the rotating shaft 6 and to reduce wear when the bottom holding frame 5 is reversed with a crane. This is desirable.

Note that a vibration-proofing material 15 may be attached to the top of the frame pedestal 12, 13 and the skirt holding portion 7 that receives the bottom skirt portion of the bottom holding frame 5 to absorb the impact when reversing or setting the bottom. It is preferable to leave space at the bottom for carrying out bricks, etc.

Next, bottom reversal will be explained.

When the drum of the overhead crane is in position A, hoist the hanging arm 9 of the bottom holding frame from E to F.

At this time, the bottom holding frame 5 rotates around the point C on the rotating shaft 6.

In this state, it is further wound up from F to G.

The rotation axis 6 moves from point C to point D. In this state, the crane drum moves from point A to point B, then gradually hangs, and the rotation axis moves from point D to the old point C.

On the other hand, the hanging arm 9 moves from H to ■, and further hangs to J, and the top end of the bottom holding frame 5 is supported by the second frame holder 13, completing the bottom reversing operation.

The forward rotation operation for returning the bottom from the above-mentioned inverted state to the normal state may be performed by performing the reverse of the above-mentioned inversion.

The stand should be strong enough to withstand lateral forces, and the slot should be long enough to allow crane operation without lifting the stand.

The jack 16 provided on the first frame holder 12 is a vertical device used to adjust the tuyere position after setting the tuyeres to the bottom, or to adjust the bottom plate 3 horizontally. In order to perform these operations accurately and easily, it is desirable to install a jack 16.

As mentioned above, the present invention eliminates the risk of lifting the stand when hoisting the crane by providing a long hole in the rotating shaft bearing, and also allows the rotating shaft to be eccentric to the overall center of the bottom and its holding frame, that is, the center of gravity. Due to this provision, the frame holder can be used to prevent rotation in both forward and reverse rotations, and special devices such as brakes and stopper sets are not required.

In other words, the device of the present invention is an excellent converter bottom reversal device that has the great advantage of being able to easily and safely perform bottom reversal and forward rotation using an overhead crane and without the need for a special drive device. It is a device.

[Brief explanation of the drawing]

FIG. 1 is a side view of the bottom reversing device, and FIG. 2 is a plan view. 1...-1Irt fireworks, 2...Skirt, 3...Bottom plate, 4...Hardware, 5...Bottom holding frame, 6...Rotating shaft, 7...Skirt holding part , 8...
Kotta one means, 9... Hanging hand, 10... Stand, 1
1... Long hole part, 12, 13... Frame holder, 14...
Metal, 15... Vibration-proof material, 16... Jacket.

Claims (1)

[Scope of utility model registration request] A bottom holding frame that fixedly holds the converter bottom removed from the furnace main body of a bottom blowing converter, a stand that rotatably supports the holding frame via a rotating shaft provided eccentrically on the bottom holding frame, and the bottom. It consists of a first frame holder that supports the holding frame when it is upright, and a second frame holder that supports it when it is inverted.The bottom holding frame is equipped with a hanging hand for a crane, while the stand supports the rotation of the bottom holding frame. A converter bottom reversing device characterized by having a long hole that supports a shaft so that it can move upwardly and downwardly.