RU205011U1 - Screw spillway - Google Patents

Abstract

The utility model relates to the field of hydraulic engineering and can be used to discharge flood waters from streams or reservoirs into river beds. The technical result of the device is to increase the efficiency of drainage of the flood water flow by eliminating cavitation phenomena in the vertical spillway shaft. To achieve the technical result - a screw spillway, including a spillway shaft with a discharge tunnel, in which the spillway shaft is additionally equipped with four flexible pipes installed in the holes of round plates, forming a helical line along the entire length of the shaft, while round plates are strung with equal intervals from each other on a cable, the end of which is fixed at the upper end of the shaft. For the passage of the cable, holes are made in the center of the round plates. 5 ill.

Description

The utility model relates to the field of hydraulic engineering and can be used to discharge flood waters from streams or reservoirs into river beds.

Known vortex spillway, containing a swirling device and a discharge conduit, and the outlet portal of the spillway with the release of the swirling flow into the atmosphere is equipped with a jet deflector made in the form of an oblique or figured cut of the outlet section of the discharge conduit (Patent for the invention of the Russian Federation No. 2483158, E02B 8/06, 2013 ).

The disadvantage of the analogue is the low efficiency of flow diversion in the range of flow rate variation from minimum to maximum.

The closest to the proposed device is a vortex spillway containing a spiral chamber with tangential guides, a vertical spillway shaft, a connecting bend, a discharge tunnel, an end part (Microsoft Word - Antonova. Vasilyeva S.M. et al. systems. FGBNU "RosNIIPM", Novocherkassk, 2014, p. 22).

The disadvantage of the prototype is the low efficiency of flow diversion in the range of flow rate variation from minimum to maximum.

From the analysis of the known technical solutions, it was revealed that a technical problem in this area is the need to expand the arsenal of technical means used for the discharge of flood waters from streams or reservoirs.

The technical result, the achievement of which is aimed at the claimed utility model, is to increase the efficiency of diverting the flow of flood waters by eliminating cavitation phenomena in a vertical spillway shaft.

To solve the technical problem of achieving the claimed technical result - a screw spillway, including a spillway shaft with a discharge tunnel, in which the spillway shaft is additionally equipped with at least four flexible pipes installed in the holes of round plates, forming a helical line along the entire length of the shaft, while round plates with equal intervals from each other are strung on a cable, the end of which is fixed in the upper end of the shaft. For the passage of the cable, holes are made in the center of the round plates.

Additionally, flexible pipes mounted in the spillway, held in the holes of the round plates, forming a helical line along the entire length of the mine, allow eliminating cavitation phenomena in the vertical spillway.

The proposed screw spillway is illustrated in the drawings.

FIG. 1 shows a spiral spillway in plan.

FIG. 2 - longitudinal section AA of the screw spillway.

FIG. 3 - cross section BB.

FIG. 4 - view B at the upper end of the spillway shaft.

FIG. 5 - photo of the device.

A spiral spillway, including a spillway 1, with a discharge tunnel 2. The spillway 1 is additionally equipped with at least four flexible pipes 3, which pass in the holes 4 of round plates 5 along their perimeter, forming a helical line along the entire length of the shaft, while round plates 5 with equal intervals from each other are strung on the cable 7, for this, holes 6 are made in the center of the round plates 5 for the passage of the cable 7. The upper end of the cable 7 is fixed on the upper round plate 5, which in turn is fixed to the upper end of the shaft 1 and the other end of the cable 7 is attached to the lower round plate 5.

The work of the screw spillway is carried out as follows.

Water, bypassing the upper round plate 5, enters the flexible pipes 3, installed along helical lines that pass in the holes 4 of the round plates 5 along their perimeter. Round plates 5 with equal intervals from each other are strung on the cable 7 passing through the central hole 6 made in the plates 5. The cable 7 is fixed at one end to the upper round plate 5, and the other to the lower round plate 5, while the upper plate 5 is fixed to the upper end of the spillway shaft 1.

Flood water, passing through flexible pipes 3 installed in the holes of round plates 5, forming a helical line along the entire length of the shaft 1, without cavitation phenomena in the vertical spillway shaft 1, enters the outlet tunnel 2 and is extinguished in the outlet well.

In comparison with the prototype, the proposed screw spillway will expand the arsenal of technical means in the field of hydraulic engineering and increase the efficiency of flow diversion by eliminating dangerous cavitation phenomena in the vertical spillway shaft.

Claims (1)

A screw spillway, including a spillway with a discharge tunnel, characterized in that the spillway is additionally equipped with four flexible pipes installed in the holes of round plates, forming a helical line along the entire length of the shaft, while round plates are strung on a cable with equal intervals from each other, the end of which is fixed at the upper end of the shaft.

Images