DE208774C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

While in the subject of the main patent the for the purpose of enlarging the Settling of substance into consideration circular section of the screen cylinder under one relatively large angle against the radius inclined scoop rails in this way in the screen cylinder are accommodated that on that side of the screen cylinder on which the inflow of the substance-carrying water takes place, the guide surface of the rails, calculated from the circumference of the screen cylinder, from top to bottom runs and thus also the introduction of the water that has flown through the sieve into the Screen cylinder takes place from top to bottom, forms the subject of the present invention another arrangement of the scoop rails with respect to the direction in which the water flows towards the Sieve cylinder takes place, and thus a substantial improvement of the device after the main patent insofar as is achieved by the same that special drive means can either be omitted entirely or the driving force for the screen cylinder compared to the required for the previously known version significantly reduced can be. Essentially, the invention consists in the fact that the under a relatively large angle against the radius of the screen cylinder inclined scoop rails in such a way are arranged in the screen cylinder that their course on the inflow side with reference is directed to the screen cylinder circumference from bottom to top, and that the water after the passage through the sieve first enters upwardly open chambers to then to be pushed over the higher rail edge, whereby the pressure of the Water flowing through the sieve is used to keep the sieve cylinder rotating to move, while the scoop rails themselves are permanently able to perform the task assigned to them according to the main patent, namely the achievement of the largest possible area for the deposition of the substance, to meet, and the removal of the still material; containing water relatively deep below the cylinder axis is accessible. The drip tray can be used in a known manner be either fixed or adjustable, and a special device be taken, by means of which the person to be considered for the deposition of the substance Circular section of the screen cylinder enlarged according to the material to be processed or can be reduced in size.

The drawing shows two exemplary embodiments of the subject matter of the invention shown in cross section.

Are shown in Figure ι a. The inclined at an angle to the radius of suction rails which are fixed to b at their ends to the end walls of the screen cylinder, in the interior of the drip tray C is arranged relatively deep below the screen cylinder. According to the present invention, the direction of the scoop rails is such that the water flowing in from the channel d

Claims (3)

after passing through the screen presses against the inner surface of the chambers formed by the scoop rails and thereby causes a rotation of the screen cylinder, 5 without further drive means being required. The screen cylinder is thus set in rotation by the inflowing water, which is then pushed over the higher edge of the rails and reaches the drip tray c like a waterfall. In the embodiment shown, the collecting tray c is supported on the cylinder axis by means of hubs provided at its ends and is screwed to some fixed machine part so that it cannot rotate; however, an arrangement can also be made by means of which a change in the segment of the circle which is considered for the deposition of the substance can be made in accordance with the various working conditions. In the embodiment of the present invention shown in Fig. 2, above the collecting tray c located relatively deep below the sieve cylinder axis, there is also a special, segments supported on the axis or otherwise centrally mounted / and arranged between these, either radially or inclined at an angle to Radius of the cylinder running guide rails g existing device is provided, which can be either fixed or rotatable in such a way that the water which flows over the circumferential rails can be received on a larger or smaller circular segment and fed to the drip tray c. Here, too, the drip tray c can be either fixed or adjustable for the purposes mentioned above, so that the various working conditions are taken into account and the device is largely adaptable to the various conditions caused by the material, etc. Finally, the screen cylinder itself can be designed in such a way that the scooping rails α, which are inclined at a relatively large angle to the radius, are not attached to the screen cylinder itself, but are freely arranged between two end rings rotatable on the axis of the screen cylinder or around the same and are located within the in this case can move inside smooth .Siebzylinders. In this embodiment, the rail drum is advantageously supported with hollow bushings on the screen cylinder axis and provided with a coupling by means of which it can be coupled to the screen cylinder in such a way that it takes the latter with it as it rotates. The coupling occurs in cardboard machines, filters or the like. Depending on the type of operation and the intended products, the difference in height between the water outside the screen cylinder and that inside the screen cylinder is large enough to pass through the inside of the screen cylinder existing amount of water occurring braking to overcome easily. In this embodiment, too, either a fixed or a rotatable drip tray, as well as the fixed or rotatable rail segment /, g described above, can be used for the special conduction of the water passing over the rail edges into the drip tray. Godfather ν τ-Α ν Proverbs: 1. Device for clarifying the wastewater from paper and pulp mills and wood grinding works according to patent 197006, characterized in that the scoop rails inclined towards the cylinder radius (a) are arranged with respect to the direction of the inflowing water in such a way that the inflowing water on the scoop chambers pushes and thereby sets the screen cylinder in rotation, whereupon this still material-carrying water, after it has exerted its driving force on the screen cylinder, is pushed over the higher rail edge and arranged like a waterfall in the relatively deep below the cylinder axis. Drip tray (c) arrives. 2. Device according to claim 1, 'characterized in that within the screen cylinder between centrally mounted segments (f) still special guide rails (g) are arranged, by means of which the water flowing over the circumferential rails (a) is received and the collecting tray (c ) is forwarded. 3. Device according to claim 1, characterized in that the scoop rails (a) between special end wreaths within the surrounding, smooth inside. Sieve cylinder are arranged, with which the end rings together with the rails can be brought into and out of connection by a coupling, so that they can be set in rotation by the water in the first case with the sieve cylinder together, in the second case alone. 1 sheet of drawings.