DE280735C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS BOd. GROUP

Patented in the German Empire on April 7, 1914.

The sludge that arises from stone sawing must be carried out during operation. continued removed to prevent the saw cuts and the sand pump from becoming completely silted up.

So far, desludging has been achieved by directly removing part of the in the sand pump located mixture of sand and water as a sludge mass, whereby

ίο however, a considerable loss of still usable cutting sand could not be avoided. The present desludging is based on the known principle, by flowing the mixture in a long channel

! 5 a separation of the usable grains of sand of the unusable sludge, like in a river bed, by gradual settling to enable and consists in the special training and arrangement of this channel in an ascending spiral.

The desludging consists of an expediently open channel, which is located in winds a helical line with the same pitch around a conical surface, downwards gradually becomes wider and a middle one in the lowermost helical end Receives overflow pipe that drains the sludge down.

The invention is shown in Figures i, 2 and 3 in view, plan and cross-section; the grinding sludge and water mixture to be desludged is fed through a pipe b into the upper spiral end of the channel and mixed there with fresh water, which is fed through a special pipe. As they flow through the channel, the grains of sand gradually sink to the bottom, the sooner the heavier they are, with the sludge adhering to the grain of sand being loosened by the rolling and rubbing movement of the grains on the ground. By reducing the flow speed, achieved by widening the cross-section of the channel towards the bottom, even the smaller grains of sand can be deposited there, while the sludge is brought down to the bottom, where it flows off through the overflow.

Since the slope of the channel is greater in the upper turns (at the top 10 percent) as below (at the bottom 2 percent), the 5 "remain lighter grains of sand down to better on the. Gutter bottom lie and are not taken up to the sludge drainage point.

If too large a deposit of sand occurs in the due to overloading of the desludger upper turns, so you can by an increased supply of fresh water the Drift grains of sand downwards and so for an even deposit of the usable sand ensure or for increased settling in the lower parts of the channel.

If the lowest part of the channel is now full, then the sand becomes during operation scooped out of the whole channel and collected in a container, which with a Water flush is provided. From there separate usable sand can with

fresh sand and water using the necessary slope to the box of Sand pump to be fed back.

The desludging can be made of reinforced concrete or cast iron.

Claims (1)

Patent claim: Device for desludging the mixture of usable and unusable Sand (mud) with water to obtain the still usable grains of sand using a mixture that guides the mixture with a slope arranged channel (river bed), characterized in that the channel on the mantle of a cone pointing upward with the tip in a spiral helical shape is arranged, with decreasing slope and increasing Flow cross-section, and in the lowermost helical end a central overflow pipe for discharging the Absorbs mud. For this purpose ι sheet of drawings.