Plate brick cartridge for a slide gate valve, and slide gate val

Details Plate brick cartridge for a slide gate valve, and slide gate val Plate brick cartridge for a slide gate valve, and slide gate val

1993-09-27

1996-01-09

Kastler, Scott

Dispensing

Molten metal dispensing

Flow controllers or assists

266236, B22D 4124

Patent

active

054821924

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

This invention relates to a slide gate valve, and particularly to a plate brick cartridge for a slide gate valve, and a slide gate valve mounted with said cartridge.


BACKGROUND OF THE INVENTION

A known slide gate valve (hereinafter referred to as "SV" equipment) consists of a plurality of plate bricks, a housing arranged at the bottom surface of a vessel for molten metal, said housing storing said plate bricks, a surface pressure load mechanism for supporting suitable surface pressure between the contact surfaces of said plate bricks, and a slide plate driving mechanism.
A group of plate bricks are replaced by new ones when they have reached their life end. At that time, the replacement working is carried out in such a manner that the SV equipment is opened under on-line system, the plate bricks are removed one by one whereafter new plate bricks are set one by one, and the surface pressure is loaded by a surface pressure load mechanism thereby to complete the replacement. Another method for the replacement is such that the SV equipment is removed and a new SV equipment incorporated with new plate bricks is substituted therefor. In such method, the replacement working is carried out by an exlusive use machine, and the removed SV equipment is sent to the maintenance section (off-line) for repairing.
Said plate bricks are in one body, the periphery of a refractory provided at their center with a molten steel flow opening, is clamped by an iron band or wire, and the plate bricks are delivered in a single unit to customers. Further, to avoid leakage of molten steel and involvement of external air into the molten steel, the plate bricks conventionally are made large-sized.
Thus, the known plate bricks have the following demerits. after casting is carried out 20-30 minutes after casting, the temperature of the SV equipment and the refractory remains considerably high, and since it takes about 15 minutes for such working the working is a heavy hot working. Further, being a heavy hot working, it is likely that the working itself becomes moderate thereby causing troubles such as molten steel leakage due to erroneous setting of the bricks. Additionally, setting of the refractory bricks one by one makes mechanization difficult. section (off-line) the bricks need to be replaced before the temperature of the SV equipment and the refractory is lowered to room temperature. Even in this stage the operation condition is still under a heavy hot working. Even in the case of replacing the refractory bricks after the temperature has lowered to room temperature, the weight of a single refractory is 5-25 kg, and therefore the heavy hot working still remains.
Referring to the working environment, since the slide gate valve is cleaned after the removal of the refractories after use, air blows or the like create a powdery dust atmosphere. In such case, a merit is just for mechanization of hot working, and not only a great amount of cost incurs for mechanization but also the refractory replacement working must be carried out by a worker so that man power cannot be saved. process refractory, great cracks are likely to generate in the processed portions, and therefore it is scarcely possible to mount a temperature sensor. clamping, to the periphery of a plate brick, the plate brick cannot be split in type. That is, in the case of plate bricks in one body structure, cracking is apt to occur, even the positions of generating cracks are irregular thereby to cause an abnormal melt-down, and this causes troubles or shortens the life of the bricks. sufficient. It was all to air cool the interior of the SV equipment so that sufficient cooling was not effected, the clamping effect of said iron band is lost due to high temperature, and the SV equipment in entirety is promoted for deformation. are discharged one by one depending on their kind, and new ones are set also one by one to the SV equipment. difficult to adjust the plate bricks themselves.
To solve the above problems of known systems, a technique for cassettiz

REFERENCES:
patent: 3554520 (1971-01-01), Grosko
patent: 3937372 (1976-02-01), Bode, Jr.
patent: 4415103 (1983-11-01), Shapland et al.
patent: 4728013 (1988-03-01), Winkelmann et al.

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