SU953079A1 - Drain arrangement of pressure-head water duct - Google Patents

Description

(54) DRAINAGE UNIT OF THE PRESSURE WATER

The invention relates to drainage devices of underground conduits such as tunnels and mines provided with steel linings.

Known drainage device of the underground conduit, which includes water intake and drainage channels in the form of pipes, which are connected to the free ends of the internal cavity of the conduit 1.

The drawbacks of the device are the need to perform special drainage channels (pipes), the need for two holes in the steel facing: one opposite the water receiving element and the second opposite the free end of the drainage channel (pipe), as well as a special drainage channel reducing the operational reliability of the device .

It is also known that a drainage device of a pressure conduit, including water intake elements located on the outer side of the conduit lining and adjacent to the holes in its lining, is cylindrical nozzles symmetrically located inside the water intake elements on the same axis

holes and overlapping holes with their free end 23.

A disadvantage of the known device is low operational reliability and increased consumption of steel for veneering.

The purpose of the invention is to increase operational reliability.

This goal is achieved by

10 that the holes in the lining are welded flush with the lining of thin walls. membranes with central openings opposite cylindrical nozzles.

15

FIG. 1 shows an underground water conduit with a steel cladding drainage device; general view; in fig. 2, node I in FIG. 1, (drainage device in the disconnected state); in fig. 3 shows the node I in FIG. 1- (drainage device during operation).

The drainage device includes a water intake element and a drainage channel.

25

The intake element 1 is made in the form of, for example, a steel hemispherical cup, located in the concrete lining 2 of the conduit 3, is flush with the concrete surface at the contact

30 with steel lining 4. Water intake-. The element may also have another, for example, a rectangular or cylindrical shape. In the center of the water intake element is attached a cylindrical nozzle 5, at the free end of which there is a tip b of viscous metal (for example, bronze). Opposite the water intake element 1 to the steel lining 4, flush with its internal surface, a circular thin-walled membrane is welded to 7 °. An example of stainless steel with a hole 8 with a diameter slightly smaller than the diameter of the cylindrical nozzle 5 in the center. The drainage device works as follows. In the case of a sealed conduit 3 (the thin-walled membrane 7 is tightly pressed to the cylindrical pipe 5, and the steel lining 4 to the edges of the water receiving element 1, the path breaks from the water conduit 3 to the concrete lining 2 and to the rock mass surrounding the conduit 3 (Fig. 2) . When emptying the conduit 3 (), the underground water squeezes the inside lining of the steel lining 3 from the water receiving element 1 and g mbr 7 at 7 from the cylindrical 5 and between the steel cladding 4 and concrete 2, and also between the 7 h membrane and the cylindrical nozzle 5 forms a gap 9 according to which fil ration water enters the water inlet Elem 1, and from it in an empty conduit 3, unloaded while on the lining 4. The presence of the cylindrical pipe 5

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Claims (2)

Fng.E ronzovogo tip 6 provide free disconnection of the contact between the cylindrical nozzle 5 and the diaphragm 7, made of stainless steel. Thus, the proposed drainage device at low additional costs can reduce the consumption of steel on the device of water pipes and increase the reliability of the device. DETAILED DESCRIPTION OF THE INVENTION A drainage device for a pressure conduit comprising water intake elements located on the outer side of the duct lining and adjacent to the holes in its lining, cylindrical nozzles symmetrically located inside the water intake elements on the same axis with the holes and overlapping holes with their own kind, characterized in that, in order to increase operational reliability, in the openings in the facing, the thin-walled membranes with central openings are flush with the facing, placed opposite cylindrical nozzles. Sources of information taken into account in the examination 1. The author's certificate of the USSR 673744, cl. E 02 B 9/06, 1976 .. 2. Authors certificate of the USSR 821646, cl. E 02 B 9/06, 1979.