FI68202B - ANORDNING FOER ATT TOEMMA EN SILO - Google Patents

Description

68202

SILO UNLOADER - ANORDING FOR ATT TÖMMA EN SILO

The present invention relates to a silo unloading device comprising at least one screw in the conical bottom of the silo connected to a drive mechanism for rotating the screw so that as the screw feeds the unloading material in the silo towards the bottom outlet in the silo the entire bottom area of the silo is within the reach of the screw.

Conventional silo unloading devices are fixedly mounted in the middle of the silo, where the driving force is applied by means of joints and gears to the screw carrying out the unloading. The screw feeds the goods towards the outlet, where its own transmission equipment is also located. The screw is conveyed around its bearing point, regardless of the feed, by means of a separate wheel or the like or by self-steering by means of friction.

In the described devices, the drive mechanism forms an obstacle in the flat-bottomed structures for the utilization of the potential energy of the goods to be unloaded, and also in cone-based silos the mechanisms are a bottleneck in the material flow. Large pieces such as wooden parts also cause a clogging hammer with these structures. In addition, various joints and gears are prone to soiling, expensive and maintenance-intensive.

The object of the present invention is to provide a new type of more efficient and simpler silo unloading device.

The silo discharge device according to the invention, in the outlet of which a cylinder is connected, to the outside of which a screw drive motor is attached, is characterized in that the cylinder follows the movements of the screw as it progresses at the bottom of the silo by its own rotational movement.

The silo unloading device according to the invention is also characterized in that the cylinder is mounted in the outlet by wheels which 68202 support the cylinder and allow it to rotate along a path in the outlet.

The silo unloading device according to the invention is also characterized in that a conventional horizontal screw is connected to the motor by means of a transmission element such as a joint.

The invention will now be described, by way of example, with reference to the accompanying drawings, in which

Figure 1 shows the conical bottom of a silo equipped with an apparatus according to the invention.

Figure 2 shows an apparatus according to the invention applied to a woodchip incineration plant.

Figure 3 shows the application of the invention to flat-bottomed silos.

Consider a chip incineration plant in which the task is to transport wood chips H from silo 1 to incinerator 10. Engines 2 and 11 are started. Engine 2 rotates a shaft 4 to which a screw 3 is attached. Screw 3 conveys wood chips to an outlet 5 , which is rotated by the motor 11. Larger pieces that are accidentally included also pass through the outlet 5, because there are no transmission devices, etc. on the road. When the screw 3 has sufficiently cleaned the area, its brushes with a high coefficient of friction will stick to the bottom 6 of the silo and the screw 3 will move forward, picking up more chips to be transported.

Along with the screw 3, the cylinder 7 to which the motor 2 is attached also pivots. The cylinder 7 is suspended from the bottom 6 of the silo by means of wheels B running along a path 9. This takes place in a continuous process and the chips automatically pass to the incinerator 10 until the silo is empty or the engine 2 is stopped.

In the case of an old flat-bottomed silo (Fig. 3), without losing the main advantages of the invention, a conventional horizontal screw 14 can be used in combination with a joint 15 on a cylinder with a motor according to the invention.

When handling well-flowing material, such as grain, there is a risk of clogging of the feed or handling equipment after the silo, for example, when, for example, the amount of grain rolling down the outlet itself exceeds the capacity of the equipment. To avoid this danger, all embodiments of the invention can be provided with a cap 16 according to Figure 3, which prevents the fluid product from self-discharging.

It will be apparent to those skilled in the art that various embodiments of the invention may vary within the scope of the claims set forth below. Thus, the material to be unloaded can be any item stored in a silo or large container, such as a grain product, coal or waste.

Claims (3)

4 68202 A silo unloading device comprising at least one screw (3) located in the bottom-like part of the silo Js »connected to the drive mechanism (2) for rotating the screw so that at the same time the screw (3) feeds the material (H) in the silo to the bottom (6). ) towards the central outlet (5) it extends around its axis (4) at the bottom of the silo (6) so that the entire bottom area of the silo is accessible by the screw (3) and that a cylinder (7) is connected to the outlet (5). the drive motor (2) of the screw (3) is attached to the outside, characterized in that the cylinder (7) follows the movements of the screw (3) as it travels at the bottom of the silo (6) by its own rotational movement. Silo unloading device according to Claim 2, characterized in that the cylinder (7) is mounted in the outlet (5) by wheels (8) which support the cylinder (7) and allow it to rotate along a path (9) in the outlet. Silo unloading device according to Claim 1 or 2, mounted on a flat-bottomed silo, characterized in that a conventional horizontal screw (14) is connected to the motor (2) by means of a transmission element such as a joint (15). Il