US1622280A - Apparatus for agitating slurry, etc. - Google Patents

Description

March 29, 1927. 1,622,280

J. 5. FASTING APPARATUS FOR AGITATING SLURRY, ETC

Filed Sept. 5, 1924 s Sheets-Sheetl J. S. FASTING APPARATUS FOR AGITATING SLURRY, ETC

March 29 1927.

Filed Sept. 5, 1924 3 Sheets-Sheet 2 Elvweutoz w 4 IAMW ch 927 J. 5. FASTING APPARATUS FOR AGITATIQG SLU RRY, ETC

5 Sheets-She'et 5 Filed Sept. 5, 1924 Patented Mar. 29, 1927.

UhlETED STATES PATENT OFFICE.

JOHAN S. FASTING. 6F VALBY, NEAR COPENHAGEN, DENMARK, ASSIGNOR TO F. L.

SMIDTEI & 00., OF NEW YORK, IQ". Y.

, A CORPGEATION OF NEW JERSEY.

AFPABATUS FOR AGITATIING SL'URRY, ETC.-

Application filed September 5, 1924.

This invention has for its object to provide improved means for the agitation of mixtures of more or less finely divided particles of solid matter with a liquid in 5 which the particles of solid matter are suspended in the liquid and may precipitate unless the entire mass is suitably agitated, The invention has been developed with particular reference to the agitation of Portland cement slurry in which. in the wet process of Portland cement making, the finely divided particles of cement raw material are suspended in water. Various means for agitating slurry and other like n'lixtures have been devised hitherto. consisting ordinarily of mechanical agitators rotating on vertical axes within the t. 1lS in which the slurry is stored. Air under pressure is also employed in conjunction with mechanical agitating devices. If the agitation of slurry ceases for a time, as by reason of the loss of power or of breaking down of the mechanism. or for any other reason. the particles of solid matter separate from the water'and settle quickly to the bottom of the tank where the solid matter becomes so compact about the lower part of the agitating devices that it is difficult to set the rotary agitating devices in operation again, it being necessary sometimes to remove the entire contents of the tank in order to free the agitating device. It is the particular object of this invention to provide agitating means of such a character that the operation thereof can be resumed even after the agitation of the mass has been discontinued for some time. without danger of breaking the mechanism and without requiring the contents of the tank to be removed. In accordance with the in vention there are suspended within the tank agitating devices which have, at least mainly. movement in a vertical direction, whereby, through the action of suitable operating devices, they can be moved through the precipitated solid matter and so resume the agitation of the mass without endangering the mechanism. Preferablv these agitating devices are formed as endless loops, preferably of chain, suspended within the storage tank from wheels driven in any convenient manner. so that the loops are caused to travel through the compacted mass and eventually to bring about a uniform remiXture of the entire mass in the tank. in coniunct-ion with mechanical agitators of this character Serial No. 736,010.

a single set of such agitating devices supported from a carrier which is moved above the tank so that the agitating devices are caused to have, in addition to the movement above referred to, a bodily movement throughout the mass of slurryv or other like material in the tank. The invention will be explained more fully hereinafter with reference to the accompanying drawings in which it is illustrated in several practical embodiments and in which- Figure 1 is a view in transverse section, through a tank with one form of the improved agitating devices supported from the carrier mounted movably above the tank.

Figure 2 is a view of the same partly in section and partly in elevation as seen from the point of view at right angles to that of Figure 1.

Figure 3 is a diagrammatic representation of the wiring for the electric motor shown in Figure 1.

Figure 4 is a top view of the devices shown in Figures 1 and '2, with the floor of the carrier partly broken away.

Figures 5 and 6 are views partly in section and partly in elevation as seen from points of view at right angles showing a similar form of mechanical agitating device with means for supplying air under pressure.

Figures 7 and 8 are respectively a vertical sectional elevation and a top view illustrating the application of the agitating devices to a circular tank. i

In the embodiment of the invention illustrated in Figures 1-4, the tank in which is stored the slurry or other semi-liquid material to be agitated, is a rectangular tank having side walls a and a bottom a with end walls not shown, On longitudinal rails a which may be supported on the side walls a, is mounted for movement to and fro a carrier Z) from which are suspended within the tank the agitating devices to be described. The carrier is supported on the rails a by flanged wheels 0 on shafts 0', suitably mounted in bearings on the carrier and driven, through sprocket wheels 0 from a driving shaft 0 The shaft 0 is mounted in hearings on the carrier 6 and may be driven, through a gear 0 and pinion c and a reduction gearing 0 from an electric motor 0 supported on the carrier and receiving current in any convenient manner. To elle reversal of the motor as the carrier leaves the end of the tank at each movement, there may be provided, as shown diagrammatically in Figure 3, limit switches 0 operated by stops 0 at the ends of the tank, and relay switches 0 the arrangement oi such motor reversing devices being well understood and re uiring no detailed explanation herein.

1- lso supported in hearings on the car T) is a shaft d, which may be driven the shaft 0 through suitable gearing (1' in has secured thereto at suitable llllQTTfil'rl, sprocket wheels From each of the sprocket wheels is siiaspended an endless loop 6, preferably a chain, which drops within the tank to the bottom thereot', shown in Figure 2, and, by the rotation of the shaft 03, is made to move, in the direction of the chain, through the mass in 1' 1e ank. At the same time, through the movement of the carrier, all of the chains are made to move through the material in the tank in the direction of the length ot' the tank, to and fro. The material in the tank is thus agitated constantly under normal conditions and it will be seen that it the itapulled through such material and tion resumed without danger of breakage or any part of the mechanism.

In the embodiment of the invention illustrated in Figures 5 and 6 the chain loops e are suspended as betore t'roin sprocket,

wheels d on a shaft (1 which is supported in bearings on the carrier Z). In alternation with the chain loops 6 there are pivotally supported from the carrier 7) air pipe which terminate in open nozzles near the bottom of the tank and are provided with weights 7" which tend normally to maintain the pipes in a vertical position, shown by full lines in Figure 5. The several pipes .7 are supplied with air under pressure from any suitable source through an air hose f and an air line 7. As the carrier moves to and fro the weighted air pipes will be drawn from the'vertical position to or toward an inclined position shown by broken lines in Figure 5 and the air supplied will thus be distributed throughout the mass of the material in the tank, the back pressure of the air tending to aid the carriage in its movement along the tank.

As shown in Figures 7 and 8 the invention may be applied also to a circular tank. its shown in these figures a circular tank a having a circular post a, supports on the outer wall a circular rail a A shaft (1, having; secured thereto sprocket wheels CZ which carry chain loops 6 as betore, is supported at its outer end upon the track by a traction wheel (2. At its inner end the shaft is supported in a bearing can ried by a sleeve a which is supported by a stud (5" carried by a base (5 on the top ot the post a Rotatably supported on the stud (Z is a bevel f w iichengag'es a bevel gear a? on the shaft (Z The bevel gear f is secured to-a second bevel 7 which is engaged by a bevel pinion j" on the drive shaft f The latter is supported at one end in a suitable caring which is carried by the stud d", and near its outer end by a bearing The shatt may be rotated by a pulley 1". it will be seen that as the shaft d is. rotated on its own axis to the gears 6Z9, 7, f and the traction wheel (5 will be caused thereby to swing about the stud f. The chain loops are thereby caused to have movement in the direction of their length and also to have the bodily movement in a horizontal direction through the material in the tank, whereby such material is agitated;

Various other modified embodiments of the invention will suggest themselves and it will be understood that the invention, except. as pointed out in the claim, is not limited to the particular construction shown. and described herein.

I claim as my invention:

In combination with a tank to receive slurry, a carrier supported on the wall of the tank and having a shaft with a series of sprocket wheels, chain loops suspended from the sprocket whe within the tank, means to rotate the shaft and sprocket wheels, means to cause the carrier to move bodily above the tank, weighted air pipes-pivotally supported from the carrier. and means to su 'iply air and pressure to the air pipes.

This specification signed this 21st day of August, A. D. 192%;

JOHAN S. FASTING.

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