SU732009A2 - Syphon apparatus for discharging sand from hydraulic classification and desliming plant - Google Patents

Description

This tank 2 is connected to a vertical suction pipe rigidly attached to it. 4, and through a smaller opening 3 - with a discharge nozzle 5. The beaker is hermetically sealed with a lid 6. Coaxially with the outlet opening of the discharge nozzle and above it is located a piston 7 with a rod 8, which is connected to the float by means of a leverage system 9 the rod is provided with a corrugated hose 11. To the lever 9 and the cover 6, magnets 12 of different polarity are opposite to each other. The fastening of the magnets allows the distance between them to be varied and thereby regulate their pulling force. Magnets can be made of various designs, from ceramic or cast permanent magnets, from a block of permanent magnets and plates of magnet iron or in the form of electromagnets.

The device works as follows.

In the disconnected state, the float is trimmed down, the opening of the discharge port is blocked by a piston, and the magnets are pulled together. As the pulp density at the bottom of the bath increases, the float tends to float, but the cohesive force of the magnets holds it. As soon as the pulp density is reached a certain (necessary) value and the force pushing the float becomes sufficient to detach the magnets from each other, the piston quickly opens the discharge pipe. The pulp under the action of the generated piezometric pressure rushes into the discharge pipe and is removed from the device.

As the pulp density in the bath decreases, the float sinks, moving the piston to the lower position. Since the piston is located above the outlet, the pulp flow rising through the suction vertical pipe does not hinder its movement. The descending flow of pulp from the discharge nozzle, due to the piston effect it creates, carries the piston with it, facilitating its rapid movement to the lower position. Besides.

when the float and the lever 13 connected with it are lowered, the distance between the magnets decreases, which is accompanied by an increase in their pulling force, which also promotes the movement of the piston to the lower position.

By the combination of the above factors, an almost instantaneous and reliable closure of the outlet of the discharge port is achieved. The siphon device stops working.

The required mode of operation of the hydraulic classifier-declarer with the proposed siphon device for unloading sands is established by adjusting the distance between the magnets, which allows the ratio of the forces causing the piston to change depending on the given density of sands. In addition, the magnets provide not gradual, but instantaneous switching on and off of the siphon, which stabilizes the quality of the separation products obtained.

The use of a corrugated hose, worn on a brush fixed at one end on the siphon head cover and the other on the rod, provides a tight connection and eliminates the need for stuffing packing of the piston rod with the siphon head cover. The invention improves the reliability of the device and improves the quality of separation products, as well as ensures the tightness of the glass.

Claims (2)

1. A siphon device for unloading sands of a hydraulic classifier St. No. 638374, characterized in that, in order to increase the reliability of the device, it is equipped with magnets of different polarities, one of which is placed on the lid of the cup, and the other is on the lever. 2. Device by. Claim 1, characterized in that the piston rod is sealed with a corrugated hose.