Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – By providing – treating or protecting environment – e.g. – vacuum
Patent
1997-11-19
1999-04-13
Kastler, Scott
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
By providing, treating or protecting environment, e.g., vacuum
266226, C21C 710, C22B 905
Patent
active
058940090
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a vacuum tight reaction vessel for steel processing, comprising a vessel bottom and a cover that can be placed thereon in a vacuum tight manner. The cover comprises a vacuum tight passage, that is embodied in the manner of a packing gland with a packing gland housing fixedly connected to the cover, a packing gland seal, and a packing gland passage, for guiding a blast pipe that is vertically movable relative to the cover.
Reaction vessels having the aforementioned features are known in practice for steel processing. For moving the blast pipe, guided through the packing gland into the interior of the vessel, a support with a carriage displaceably arranged thereat and a coordinated drive unit is, in general, provided at the cover of the vessel whereby the blast pipe is supported. A coordinated drive unit is provided This arrangement has the disadvantage, respectively, results in the problem that due to imprecise manufacturing dimensions as well as due to thermal loading of the components during operation, tolerances result which impede a straight and thus friction-reduced and easy movement of the blast pipe through the packing gland. The result is that, due to the high movement resistance, the blast pipe upon passage through the packing gland, when the driving power of the carriage is too high, is bent or that the carriage drive cannot provide sufficient power to overcome the moving resistance.
It is therefore an object of the invention to improve a vacuum tight reaction vessel with the aforementioned features such that in all operation positions a secure and easy movement of the blast pipe through the packing gland is achieved.
SUMMARY OF THE INVENTION
The solution to this object results, including advantageous embodiments and further improvements of the invention, from the contents of the claims which follow this description.
The basic principle of the invention is that the packing gland passage is arranged with lateral play relative to the packing gland housing and is connected to the packing gland housing by a lateral compensator which allows lateral movements of the packing gland passage with the blast pipe guided therein. This has the advantage that a lateral movement of the packing gland passage, guiding the blast pipe, relative to the stationary packing gland housing, connected to the cover, is possible due to the arrangement of the lateral compensator so that in this manner manufacturing tolerances or thermally produced tolerances can be compensated.
According to one embodiment of the invention it is suggested that one of the end flanges of the lateral compensator is connected to the packing gland passage and the other oppositely arranged end flange of the lateral compensator is connected to the packing gland housing. The lateral compensator, surrounding annularly the packing gland passage, can be arranged within the intermediate space between the packing gland passage and the packing gland housing, especially in the area of one end flange and/or in the area of the other end flange, with lateral play relative to the packing gland housing.
In one embodiment of the invention, the packing gland passage is comprised of a guide member, surrounding the blast pipe and receiving the packing gland seal, and a passage member, resting thereon and fixedly connected to the guide member. The guide member comprises a radially projecting flange for abutment at the corresponding end flange of the lateral compensator.
In order to prevent leakage during lateral movements of the packing gland passage guiding the blast pipe relative to the packing gland housing, according to one embodiment of the invention it is suggested that the interior space of the lateral compensator itself is under vacuum, too. For this purpose, the interior space of the lateral compensator is connected via at least one corresponding bore, penetrating the packing gland housing and/or corresponding connecting parts such as the lid socket or base plate, with the interior of the vessel.
When fl
REFERENCES:
patent: 3669437 (1972-06-01), Wernicke
patent: 4465265 (1984-08-01), Kryczum et al.
Kastler Scott
Technometal Gesellschaft fur Metalltechnologie mbH
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