SU759731A1 - Draining apparatus for underground pressure water conduit - Google Patents

Description

The invention relates to the field of construction and can be applied in the construction of pressure conduits that are part of hydropower plants, pumped storage plants, water outlets and other structures. _five

Known drainage device underground pressure conduit with steel cladding, made in the form of discharge openings in steel cladding with drainage pipes laid inside the conduit [1]. YU

The disadvantages of this design are the high metal drainage and low throughput of the conduit.

The purpose of the invention is to reduce the cost of drainage.

This object is achieved in that the device dre- ¹⁵ changes require underground pressure conduit is designed as a drainage tube, which communicates with the cavity and the water conduit is made of two joined coupling units, wherein one end of the pipe is provided with a cupped broadening annular seal embedded and flush with the surface of the concrete lining and the other end is bonded with facing.

2

FIG. 1 shows a drainage device when the water line is injected; in fig. 2 the same, when the water line is empty; Fig. Node receiving element.

The drainage device of the underground pressure water conduit with steel lining 1 includes a drainage pipe 2 of two, links connected by a coupling 3. One 'pipe end is provided with a cup-shaped broadening 4 with an o-ring seal 5 and flush with the surface of the concrete lining 6. The other end of the drain pipe is connected through holes 7 with a conduit and rigidly bonded with lining. Cup-shaped broadening 4 is a water intake device for drainage when emptying the conduit.

For inspection and cleaning of drainage in steel cladding opposite the water intake elements, a hole is made, which is blocked by a threaded plug 8.

Drainage works as follows.

In the period of operation, when the internal pressure of water exceeds the pressure of groundwater, the steel lining 1 is pressed tightly against the water intake cup-shaped broadening 4, which prevents the movement of water

759731

water conduit. When the water line is emptied, the steel lining is compressed under the action of groundwater pressure. A gap 9 is formed between the outer surface of the lining and the lining concrete. Through the gap 9, the drainage water enters the water-receiving cup-like broadenings 4 and through the drainage pipe 2 through the openings 7 into the empty water conduit. In order to ensure mobility with respect to concrete lining, the pipe 2 is greased with grease from the point of joining with the lining to the coupling before the start of concreting.

The drainage device works only during the period of draining the water conduit, which increases its durability.

The required number of drainage devices and their sizes are determined on the model or by calculation and depends on the size of the water conduit, the water content of the rock, the pressure of groundwater, etc.

The use of the invention allows to significantly reduce the cost of drainage devices of underground pressure pipelines and

steel cladding due to a sharp reduction in metal consumption.

Claims (1)

Claim Drainage device of an underground pressure water conduit with steel lining, including a drainage pipe, characterized in that, in order to reduce the cost of drainage, the drainage pipe is communicated It has a cavity and is made of two coupled joints, with one end of the pipe provided with a cup-shaped broadening with an annular seal and sealed flush with the surface of the concrete lining, and the other end is bonded with the lining.