SU1257134A1 - Shaft spillway - Google Patents

Description

The invention is otsitsitsp to hydraulic engineering and can be used in the shaltnich spillways, intended for DK discharge zodas from the upper core. from the bottom and bottom.

The invention is an increase in the reliability of the structure by reducing the pulse 7 DY of the hydrodynamic pressure of the water flow before entering the outgoing tunnel.

a & KG, 1 shows the spillway j vetikalrsh cut (but axis); Fig, 2 - section AA fig, 1.

fflax i HbM spillway includes a water trap funnel 13, a vertical shaft 2 and a diverting tunnel 3; the drain sounder 1 is equipped with an annular protrusion 4 with air ducts 5 placed in it. In the lower part of the vertical ottoman 2 there is a gasch chamber, made in the form of rings well

whose wall

The height of the variable height is higher, and its height from the side of the diversion of its tunnel 3 is maximum. The overflow head 7 of the annular well 6 is located above the ceiling 8 of the diverting tunnel 3. The height of the annular well 6 is determined from the conditions of excess energy nadaudai flux water The presence of a constant layer of water in the room 1, the evolent well 6 prevents: direct the impact of high cos- sigorous flow on the elements of a golodtsz. 6 o

The configuration 55 of the well head 6 for c) in: a) this case is determined by simulation depending on the current head. Design, its throughput capacity. From the dimensions of the well 6, for supplying air under the head 7 of the well b, an air duct 9. is made, consisting of an annular apertured pipe located under the head 7 from the outer side of the well b, and tubular inlets connected to the annular a pipe and a bucket in the vertical shaft 2, a water supply pipe 10 is connected to the ring well b, the end of which is led to the upper reach and fitted with a valve 11 The pipe 10 is led to the well 6 on the bottom of its bottom and tangentially to its wall, In the wall well 6 out ying vodovshusknoe location with an opening 12p Sennoe at the bottom of the well 6.

The spillway works the next way.

five

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Some time before the beginning of the flow, the valve 11 opens, the water from the headwater reaches the pipe 10 and enters the annular well 6 and fills it. At this point, the tangential in plan direction of the end portion of the pipe 10 to the contour of the wall of the well 6 eliminates the harmful effect of the jet of water flowing out of the pipe 10 on the elements of the well 6, since the water jet turns out to be swirling about the vertical axis of the annular well b and spreads along its wall

After filling the well 6, the mine spillway comes into operation directly.

The flow of water, entering through the funnel 1 into the vertical shaft 2, is detached from the walls of the shaft 2 on the ledge 4. Within the mine 2, the flow mode is a free fall. The cavitation free mode is provided by supplying air under the protrusion 4 carried out by the air ducts 5. The protrusion 4 is made with such an inclination that the tangents to its surface intersect on the axis of the shaft 2 within it, which ensures that the flow enters the annular well 6, where it is intensively mixed and rubbed em the main part of the kinetic energy. When this occurs in the well 6, an air-air mixture is formed with a concentration of air on the walls of the well 6, sufficient to provide an unspecified mode in it.

 From well 6, the flow overflows through the head into the tunnel 3. The presence of a variable height of the wall of the well and the fact that from the side of the diverting tunnel 3 its height is maximal, contribute to the uneven distribution of running costs through the head 7, i.e. a significant part of the flow is poured away from the diverting tunnel 3, and not before entering it, which eliminates the formation of flow pulsation areas before entering the diversion tunnel 3. At the same time, the uneven distribution of running water flow through the tip 7 creates a difference in water levels from the outside of the well 6 in front of the tunnel 3 and from the opposite side. Due to this difference in levels, the flow rates bypassing the well b are increasing, which is also not 3.

It includes pulsation of the water flow before the air duct 9, which provides air supply by the tunnel 3, under the overflow head.

To prevent cavitation on the annular well 6. Air intake over the overflow head 7 is used is carried out from the shaft 2.

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Claims (1)

MINE WATER DISCHARGE, including a spillway funnel, a vertical shaft, a diversion tunnel, a quenching chamber located in the lower part of the shaft, made in the form of an annular well, the tip of which is located above the ceiling of the diverting tunnel, about one liter and h. In order to improve the reliability of the structure by reducing the pulsations of the hydrodynamic pressure of the water flow before entering the outlet tunnel, the wall of the annular well is made of variable height, and its height is maximum from the outlet tunnel. Fp.1 with 1257134 ί 1