US 1918430 A
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J. SCHLOTMANN MEANS FOR UNIFORMLY COOLING HOT BLAST AND HOT GAS GATE VALVE DI SKS July 18, 1933 k n W Patented July 1-8, 1933 UNITED STATES 1,918,430 PATENT OFFICE J'OSEF SOHLOTMANN, OF OIBERHA'USEN-IRHEINLAND, GERMANY, ASSIGNOR TO F IRM': GUTEHOFFNUNGSHU'TTE OBERHA'USEN AKTIENGESELLSGHAFT, 0F OBERHAUSEN- RHEINLAN D, GERMANY mus roa'umroimrv COOLING nor BLAST Ann nor ens earn VALVE msxs Application filed December 24, 1931, Serial No.
'Water-cooled hot-blast gate valve disks are known to have their cooling chamber subdivided by different cross walls for guiding the cooling water, these cross walls producrn however une ual cross sections when applie to a round dis ,preventing thereby .a uniform cooling effect and a sufficient flow of water all parts. In particular the formation of a1r and steam pockets was rendered poss ble thereby, which prevent the heat from be ng eliminated and which moreover promote the formation at the surfaces not touched by the flow of water of deposits of mud contained in the cooling water with the effect that within the range of these places the walls of gate valve disks are exposed to a rapid destrucr tion owing to the destructive action of heat.
The object of the invention is to provide an improvement for gate valve disks which avoids the drawbacks described heretofore and which makes them last for a considerably longer time. The cooling water chamber is subdivided by cross walls into channels of preferably spiral shape having an approximately equal cross section through which channels the cooling water is guided changing several times its direction. Deposits of mud and air pockets are avoided to a considerable extent by the cross walls being provided within the range of the points where the flow of water is reversed, as well as at the highest points with vents through which the gases or vapours carried along by or generated in the water are eliminated. Thereby the flow of water always will keep its closed nature and will proceed in auniform current thus preventing in a high degree the formation of mud deposits and of places where cooling is less efiicient.
With reference to the accompanying drawl ig. 1 shows a'vertical section through a gate valve disk in a gate valve generally outlined in its open position, and
Fig. 2 shows a cross section on line A- B of Fig. 1, when the valve is closed.
In the interior of the valve body V in a manner well known in itself the gate valve disk 1; is movably arranged and is kept adjustable as to its position by a rope connection with counterweight, by a threaded spindle or by some other suitable means. Ac-
cording to the invention the cooling chamber of the gate valve disk is subdivided by cross 582,972, and in Germany December 27, 1930.
walls 5 into cooling channels curved to a cooling chambers vents 0 are'provided in the guide walls I) through which vents all gases and vapours carried along by or generated in the water are eliminated and leave the gate valve disk together with the flowingofi cooling water. d designates the inlet pipe and e the discharge pipe for the cooling water. The uniformity of the cooling effect can be increased by intermittent change in the flow of the cooling water so as to cause the discharge pipe ve used hitherto for this purpose to serve as inlet pipe, while the previous inlet pipe 03 discharges the cooling water.
The covering plate a conveniently is secured to the gate valve disk a at the points f by screws or other means of fixation and at f by meansof welding. It is to be understood, of course, that the disk may be manufactured in any other way.
Besides for hot blast and hot gas gate valve disks, the invention is also to be understood as applying to all other water-cooled closing means of the sliding or turning type exposed to high temperatures.
What I claim is 1. A hot blast valve, or the like, comprising in combination with a valve casing, a hollow valve member of substantially circular cross-section provided with spaced curved partitions forming substantially spiral- 9 shaped channels, said partitions having ventholes therein at certain intervals.
2. A hot blast valve, or the like, comprising in combination with a valve casing, a hollow valve member of substantially circular cross-section provided with uniformly spaced curved partitions forming substantially spiral-shaped channels, said partitions having vent-holes at certain intervals, and a cover secured to said hollow valve member. I I