The object of the invention is a discharger for peat or oth mass operating from above and intended for a space like a sil which includes a transfer member that moves the mass from t surface of the mass to outside the silo.

Peat is known to be a material that is difficult to store. easily tends to arch onto the sides of the silo, so that di charge devices on the bottom of the silo only form a holl inside the peat mass. In winter in particular arching is a ve great problem, which attempts have been made to overcome means of heating and vibration.

There are also known discharge devices operating from abov which may consist of, for example, a screw conveyor installed the middle of a high cylindrical storage tank. In this case to however, there is a danger of arching as the screw eats a holl in the middle of the mass. For a low silo in particular, the is nothing else available than dischargers that operate fr below.

The intention of this invention is to create a new kind discharger that operates from above, which does not have t drawbacks mentioned above and which therefore operates reliab in winter too. The characteristic features of a discharger accordance with the invention are presented in the accompanyi Patent Claims. A discharger in accordance with the inventi operates so reliably that it can also be used as a batcher. T size of the batch can then be controlled by means of the spe of rotation of the scraper conveyor. With the aid of a di charger in accordance with the invention it is also possible fill a low silo up to the brim, as the rotating scraper convey levels the mass deposited in the silo.

In what follows the invention is illustrated by reference to t accompanying figures, which show one discharger in accordan with the invention in connection with a sludge treatment uni

Figure 1 shows a cross-section of a silo equipped with a discharger in accordance with the invention. Figures 2a and 2b show side and top views of a separate scraper conveyor. Figure 3 shows the installation of a silo in accordance with the invention in connection with a sludge treatment unit.

Here the silo 1 is constructed on a casette base 2. The side 1.2 of the discharge end and the base 1.1 of the silo are marked separately. The top of the silo 1 includes a cover construction 7, in which there is a feed opening and sides 9 running round it. A disk screen 8 is arranged inside the silo, next to the opening. A scraper conveyor 4, which is shown in three different positions in Figure 1, is connected by means of joint 3 formed in axle 23 next to the discharge opening in the cover construc¬ tion 7. The situation shown by a solid line shows the silo empty and the position K shows the silo full, while one intermediate position is drawn between them.

The scraper conveyor 4 consists of moving scrapers 4.1 and a joint 5, which makes it possible to turn the scraper conveyor against the sides 1.2 and the bottom 1.1. The Figure shows the auxilliary wheel 6 required in the jointing. The scraper con¬ veyor rotates in such a way that its lower part moves in the direction of the side 1.2 and the mass is thus scraped from the surface over the edge of the silo to the conveyor 12. The scrapers 4.1 are of L-section steel welded to a chain 17. Other shapes too can be used, but it is advantageous to set the free flange or the hollow of the scraper against the mass, in which case it can tear open the surface of a frozen mass.

During filling, the scraper conveyor is raised into position K by means of the raising device 10 and cables 11 and is then started. As the mass drops from the feed opening through the disk screen 8 and the scraper conveyor 4, the scraper conveyor levels the mass in the silo 1 and achieves the precise filling of the entire silo 1.

During operation, the scraper conveyor is not attached othe than at the jointing 3 and it rests its own weight on top of th peat mass in the silo.

Figures 2a and 2b show the construction of the scraper conveyo in greater detail. In the Figures the right side of the scrape conveyor is cut and in reality it is longer than the left side The scraper conveyor 4 is principally formed by chains 17 ro tating around guide rollers 15 and 16 on axles 23 and 25 and o scrapers 4.1 attached to them. The axle 23 of the front guid roller 15 is attached to the cover structure 7 by bracket 14 an the axle is rotated by mens of motor 22, which is installed o the wall of the silo 1.

The above-mentioned guide rollers 15 and 16 are attached b bearings to the frame components 18 and 19, which are in tur mutually jointed by means of joint 5 formed in axle 24. Auxil liary wheel 20 is located on this axle of joint 5 and auxilliar wheel 6 is located on support structure 21 in the region of thi above the chain a little in the direction of the dischargin end. Auxilliary wheel 6 forces the chains to travel essentiall through the point of change of direction.

Silo discharge in accordance with the invention can be used fo many kinds of purposes. An example of this is the arrangement i accordance with Figure 3, in which silo 1 is located in connec tion with a sewage treatment unit. From on top if the silo 1 th disk screen and the deflection plates surrounding it are see through the feed opening. Lifting device 10, which, if neces sary, raises the scraper conveyor through cables 11, is locate on top of the covered silo. The measured amount of the peat mas is transferred to the sewage treatment unit by means of th conveyor belt 12.

The discharger in accordance with the invention can naturally b used for the movement of masses of nearly all kinds.