Device for facilitating the circulation of fluid coolant

DETAILED DESCRIPTION OF THE INVENTION The FIGURE illustrates a device 1 according to the invention.
Numeral 2 designates a storage and collection tank.
For operational purposes, the coolant fluid contained therein has a fluid level 3.
Numeral 4 designates a first pipe whose one end 5 extends down below the fluid level 3 and whose other end 6 is connected with the inlet of the electrically driven injector pump 7.
The distinguishing feature of this injector pump 7 is a convergent conus 8, by means of which the coolant fluid transferred by the impeller 9 of the pump 7 is reduced to a narrower cross-section for the purpose of increasing pressure in the second pipe 10.
The arrows appearing in the FIGURE point out the direction of flow of the coolant fluid during operation.
This second pipe 10 leads from the outlet 11 of the injector pump 7 to the coolant outlet 12 of the device.
Numeral 13 designates a regulating valve optionally fitted into the second pipe 10.
With this valve, a reduction in volume of the coolant transferred through the outlet opening 12 is obtainable.
This valve 13 particularly serves the purpose of maintaining sufficient high pressure between the outlet 11 of the pump 7 and the valve 13 for the fluid-jet negative-pressure pump 20 to be described below.
Numeral 13 designates the coolant backflow inlet of the device 1.
The third pipe 15 leads to the inlet 16 of the settling cascade 17 provided for cleansing the coolant.
Numeral 20 designates a fluid-jet negative-pressure pump.
Its inlet 21, serving the purpose of feeding its operating means, is connected via the fourth pipe 22 with the outlet 11 of the injector pump 7.
In the present embodiment, this pipe 22 is connected with pipe 10 instead of being directly connected with the injector pump 7.
This arrangement reduces the quantity of pipe required.
Numeral 23 designates the fifth pipe, which leads from the negative-pressure inlet 24 of device 1 to the negative-pressure inlet 25 of the fluid-jet negative pressure pump 20.
From the outlet 26 of this pump 20, the sixth pipe 27 should preferably extend down to below the planned operational fluid level 3