FIELD: drilling soil or rocks; mining.
SUBSTANCE: group of inventions relates to drainage devices. Hollow drainage unit comprises at least one hollow drainage element (10), at least one first shaft element (11) and at least one second shaft element (12). In the first shaft element (11) between the fluid medium inflow (14) and the fluid medium drain (15) there is cleaning element (13). In the second shaft element (12) between the fluid medium inflow (17) and the fluid medium drain (18) there is throttle element (16). Shaft elements (11, 12) are hydrodynamically connected or made with possibility of hydrodynamic connection with one or more hollow drain elements (10). Hollow drainage system comprises several hollow drainage elements and at least one above described hollow drainage unit, which is connected to hollow drainage elements. Shaft element (11) for the above-described hollow drainage unit for cleaning fluid medium contains inflow (14) of fluid medium, fluid drain (15) and guiding or retaining device (20), which is located in shaft element (11), retains cleaning element (13) and separates shaft element (11) into clean side and dirty side. Guiding or retaining device (20) includes a pipe which is hydrodynamically tightly connected to fluid inflow (14) on the dirty side and has opening (23) on the clean side, which forms a hydrodynamic connection with the fluid medium drain (15). Shaft element for the above described hollow drainage unit for fluid medium throttling comprises a fluid medium inflow (14), a fluid medium drain (15) and a controlled throttle element (16), which, on one side, is connected to actuating motor (21) and, on the other side, from the outlet side is hydrodynamically tightly connected to fluid drain (18).
EFFECT: providing the creation of a hollow drainage unit, which simplifies the construction of the hollow drainage system, can be connected to the sewage network and is protected from clogging with solid substances, at that, creation of hollow drainage system and shaft element for such hollow drainage unit is also provided.
20 cl, 6 dwg
