US1303470A - gillette - Google Patents

Description

.l. C. GILLETTE.

LIQUID COOLED CONVEYER APPARATUS.

APPLICATION HLED APR. i2. I916.

Patented May 13 IN VEN TOR. J. GILLETTE ATT RNEY m: mmms PEYERS co.. mwm-uma, WASMINOHJAI, s. c

UNITED srnrns PATENT OFFICE.

JOHN C. GILLETTE, OF LAKEWOOD, OHTO, ASSIGNOR, IBY MESNE ASSIGNMENTS, TO NATIONAL CARBON COMPANY, INCL, A CORPORATION OF NEW YORK.

LIQUID-COOLEID GONVEYER APPARATUS.

Specification of Letters latent.

Patented May 13, 1919.

Application filed April 12, 1916. Serial No. 90,546.

To all whom it may concern:

Be it known that 1, JOHN C. Gnmnrr'rn, a citizen of the United States, residing at Lakewood, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in LiquidCooled Gonveyer Apparatus, of which the following is a full, clear, and exact description.

This invention relates to apparatus for rapidly cooling material heated to very high temperatures. Many materials which are treated or heated in an electric furnace attain temperatures approaching 2,000 C. and it is often desirable to remove the hot material while still at these temperatures, so that additional material may be treated.

It is, however, impossible to do this until it has at least been cooled below a red heat.

My invention relates to a water cooled screw conveyor for accomplishing this purpose.

Referring to the drawings Figure 1 is a centrallongitudinal section of the apparatus embodying my invention.

Fig. 2 is a plan view of the conveyer with the cover plate removed. Fig. 3 is a detail of the casing cover on a reduced scale as viewed from the under side thereof.

In Fig. 1 my invention is illustrated in connection with the base 1 of a furnace having a discharge outlet 2 in the bottom. The conveyer consists of a watertight casing 3 resting on supporting channels 4 placed on a foundation 5. The watertight casing has a removable cover plate 6 with a central opening 7 in alinementwith the outlet 2. The base 1 of the furnace is preferably adj acent and in contact with the removable cover plate. A large T pipe connection 8 placed within the casing is supported therein in an inverted position by means of 7 suitable spiders 9 resting on thebottom of the casing. The opening of the projection 10 of the T is adjacent the opening of the cover plate and in alinement with the outlet of the furnace. The T is joined tothe cover plate 6 by bolting or otherwise fastening the flange.

11 of the projection 10 thereto to make a watertight joint. An opening is also provided in one end 12 of the casing in alinement with the opening in the adjacent horizontal arm 13 of the T. The other end 14 of the casing also has an opening in salinement with the other horizontal arm 15 of Watertight connection'with end 12 and arm 13. Within the flanged pipe 16 there is fitted a hollow journal 17 having a threaded end 18 for connecting a hollow screw conveyer 19 thereto. A thrust bearing 20 for the end of the journal is fitted in the end 12. The means for lubricating the journal 17 and its endconsists of an oil cup 21 with suitable leads 22, 23.

To the other opening of the casing 3 a jacket 24 is attached which surrounds a conveyer casing or discharge tube 25 passing through an opening in the end 14 of the casing 3- and joining the arm 15 of the T. The passageway for material consisting of the armsflOand 15 of the T 8 and the conveyer tube 25 connected thereto comprise a spout for removal of material. The jacket 24 is attachedto the end 14 of the casing 3 by means of a collar 26 into which the jacket is threaded, and the discharge tube 25 and flange of the arm 15 are similarly fastened in a water-tight manner by means of a collar 27. A cap 28 closesthe jacket member 24 and the discharge tube 25 passes through a suitable opening in the cap. The conveyer discharge tube 25 incloses the conveyer screw 19 and is closed by a cap 29 having an opening. for the projecting end 30 of the conveyor screw. Anopening 25' is provided inthe' portion of the: discharge tube 25 between the caps 28 and 29 through which material will be discharged into a truck 31 when theconveyer screw is rotated.

The conveyor screw '19. whichis hollow preferably consists of several similar sections each threaded together by means of a hollow sleeve 31. The convolutions 32 are hollow and the thickness of the metal is approximately the same as the body of the screw. To agitate the water while passing through the conveyer screw, the threads are provided with inwardly projecting ribs 33. The end section of the hollow conveyer screw is threaded onto a sleeve 34 having a gear 35 fastened thereon, which meshes with a worm gear 36 for rotating the conveyer. The sleeve 34 is supported at one end by a bearing in standard 37.

To cool the conveyer, water or other cooling liquid is admitted through a number of inlet pipes one of Which, 38, feeds the cooling. liquid through the bearings 20 and 17 into the interior'of the hollow screw 19. A second inlet pipe 39 feeds cooling liquid into the casing near the top'and a third pipe 40 admits water near the bottom. All of the inlet pipes may be tapped from the same line 41 and the amount of liquid admitted through each inlet may be controlled by means of valves 42, 43, 44.

The outlets consist of an opening 45 in the cover plate 6 connected to a pipe 46 located at a higher level than the surface of the cover plate. This outlet insures proper cooling of the cover plate and the arm 10 of the T by producing a circulation of liquid in the'upperj parts of the casing. To promote proper circulation and to cool the cover plate morefefficiently, it is provided with projecting fins 47 These fins are placed on opposite sides and approximately concentric to the upper arm 10 'of the T, but parts adjacent each end of the casing are omitted, thus forming a passage between the fins which is open at the ends. The stream of water admitted through inlet 39 will then be more or less confined to the path inside the fins and close to the arm of the T.

A certain amount of water is removed through the pipe 46 but the greater part admittedto the casing through the pipes 39 material being removed Inasmuch. as the conveyer screw 19 is a rotatable member, inlet 38 and outlet 34 will be provided with suitable stuffing boxes 50, 51 respectively.

By the arrangement shown the brick base 1 of the furnace; will be maintained cool by the circulation ofwater across the lower surface of the cover plate 6. Since-the level of the outlet is above the cover plate, water will always be in contact therewith while water is flowing out of pipe 46 and the cover plate will not be in danger of being burned out by the heat of the base of the furnace.

The How of waterbetween the fins 47 insures proper cooling of the upper arm 10 of the T into which the'hot'material is first admitted. When my water cooled conveyer is used with the electric furnace shown in the application of W. R. Clymer, Serial No. 56,229, filed October 16, 1915, the material out damaging it.

deposited in the arm 10 may be at a temperatnre as high as 2,000 C., which is far above the melting point of the iron T, with- The material is cooled considerably in this arm of the T, especially the portions immediately adjacent thereto, but by far the greater cooling effect is produced when the material strikes the relatively thin screw conveyer 19. The material at this point is cooled by the current of water passing through the hollow conveyer and at this point a large volume of water is passed steadily through as the service here is most severe, as most of the material is still in the neighborhood of 2,000 C. The material will be continually moved from this point and as it is carried along by the conveyer, it will be further cooled in the arm 15 of the T. At this point the layer of material between the screw conveyer and the arm 15 of the T is relatively thin, so that for a given volume of material the radiating surface is relatively large. While still in the casing 3 it is further cooled as it passes in a thin layer between tube 25 and the conveyer screw. The cooling will be completed by the water flowing in the interior of the conveyer and that passing between the tubes 24 and 25. When deposited in the car 31, the material, which was originally white hot, will have been cooled so that it may be handled without danger, in fact the temperature may be easily reduced by the aparatus described to a degree which will not urn the hands.

While I have described the water connections as consisting of three separate inlets and three separate outlets for passing streams of cooling liquid through the apparatus, I may pass the same water successively through the connections. For example, the cold water may first be admitted through inlet 38 and passed through the hollow conveyer 19 where the cooling is most essential. The outlet end 34 of the conveyer may then be connected to inlet 39 and the water removed through pipe 48 which may in turn be connected to inlet 40. All of the water will then be removed through pipe 46 and run into a cooling tower or a drain. It will be obvious that the essential for cooling is the continual passage of water over all metallic surfaces subjected to heat, and for this purpose the inlet and outlet pipes may be arranged in various ways to accomplish the same result.

Having described my invention, what I claim is 1. In apparatus for heating materials to high temperatures, a hollow casing adjacent to a furnace base, a discharge spout connected to the top of said casing and passing therethrough, ahollow screw conveyer in said discharge spout adapted to remove heated material therefrom, and means for passing cold water through the casing around said discharge spout and through said conveyer to cool the heated material.

2. In apparatus for heating material to high temperatures, a hollow casing adjacent to a furnace base, a hollow inverted T member secured to the top of said casing, a discharge tube connected to one side of said T member, a hollow conveyer in the T memher and discharge tube, and means for passing cold water through the casing around the T member and through said conveyer to cool the heated material.

3. In apparatus for removing heated material from a furnace base, a screw conveyer for moving the material having a passageway for circulating a cooling medium, a tube surrounding said conveyer, a casing surrounding the tube and adj acent the. furnace base, means connecting the tube to the casing for admitting the material from the furnace base and means whereby a cooling material is caused to circulate around the first mentioned means to cool the material therein before reaching the conveyer.

4. In apparatus for removing heated material from a furnace, a screw conveyer for removing the material having a passageway for circulating a cooling medium, a conveyer discharge tube surrounding said conveyer having an opening for admitting material and a second opening for discharging material, a furnace discharge passage connected to the furnace base and to said first mentioned opening, a casing surrounding the discharge tube and furnace discharge passage, and means for circulating a cooling medium around the discharge tube and furnace discharge passage.

. 5. In apparatus for removing heated material from a furnace outlet, a casing adjacent the furnace having an opening adjoining the furnace outlet and a second opening at right anglesthereto, a T pipe connection supported in the casing in an inverted position with the vertical arm connected to the first mentioned opening, a conveyer screw passing through the horizontal arms of the T having a passageway for circulating a cooling medium, a tube connected to one of the horizontal arms of the T and passing through the second opening in the casing, means for admitting a cooling medium to the casing and removing it at the top of the casing.

6. In apparatus for removing heated material from a furnace outlet, a casing adjacent the furnace having an opening adjoining the furnace outlet and a second opening at right angles thereto, a T pipe connection supported in the casing in an inverted position with the vertical arm connected to the first mentioned opening, a conveyer screw cooling medium, a tube connected to one of the horizontal arms of the T and passing through the second opening in the casing, a jacket spaced from the tube and attached to the casing at a point adjacent the second opening therein, means for admitting a cooling medium to the casing and removing it at the top of the casing and through said second opening in the casing.

7. In apparatus for removing heated material from a furnace outlet, a casing adjacent the furnace having an opening adj oin ing the furnace outlet and a second opening at right angles thereto, a T pipe connection supported in the casing in an inverted position with the vertical arm connected to the first mentioned opening, a conveyer screw passing through the horizontal arms of the T having a passageway for circulating a cooling medium, a tube having an opening, said tube being connected to one of the alined arms of the T and passing through the second opening in the casing, a jacket spaced from the tube and adjoining the opening in the casing, means for passing a cooling medium through the casing and between the jacket and tube, means for removing a cooling material from the top of the casing and me ans for rotating the conveyer to carry material along the tube to the opening therein.

8. In apparatus for removing heated material from a furnace outlet, a casing adjacent the furnace having an opening adjoining the furnace outlet and a second opening at right angles thereto, a T pipe connection supported in the casing in an inverted position with the vertical arm connected to said first mentioned opening, a conveyer screw passing through the alined arms of the T having a passageway for circulating a cooling medium, a tube connected to one of the alined arms of the T and passing through the second opening in the casing, a jacket spaced from the tube apd adjoining the second mentioned opening in the casing, a cap on the jacket having an opening for the passage of the tube therethrough, a second cap on the end of the tube having an opening for the passage of the conveyer end, and means for rotating the conveyer.

9. In apparatus for removing heated material from a furnace outlet, a hollow screw conveyer having hollow oonvolutions for circulating a cooling medium, a tube surrounding the conveyer having an opening and a casing surrounding the tube and spaced therefrom having an opening adjoining the furnace outlet, a connection between said openings of the tube and casing, and means whereby a cooling material is caused to circulate between said tube and casing and around said connection.

10. In apparatus for removing heated material from a furnace, a hollow screw conveyer having hollow convolutions and inwardly projecting baflle members in the hollow spa-0e, means for passing a cooling medium through the conveyer, a tube surrounding the conveyer, a jacket surounding the tube and spaced therefrom and means for passing a cooling medium between the tube and jacket. 10

In testimony wherof I hereunto aflix my signature.

J. C. GILLETTE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). 0.

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