SU968159A1 - Water intake arrangement - Google Patents

Description

(5) DRAINAGE CONSTRUCTION

one

The invention relates to the field of hydraulic engineering, in particular to the water intake structures.

A water intake structure is known, including a oblique circulation threshold, a water intake chamber. ru with gates, vent holes and discharge channel j.

A disadvantage of the known construction is that during the flushing of pumps from the upstream, the flow of water into the discharge channel is stopped.

It is also known to be a water intake structure comprising two symmetrically converging canals, communicated in the zone of convergence with a diversion conduit, and a discharge channel t 2.

A disadvantage of the known construction is that it does not provide pump-free water intake to the water intake chamber.

The purpose of the invention is to reduce the number of pumps in the discharge conduit.

This target is achieved by the fact that the symmetrically converging channels are communicated with the outlet conduit by means of a siphon.

FIG. 1 1 shows the device, the plan; FIG. 2 - the same, cross section .; in fig. 3 - the same longitudinal section along the axis of symmetry.

The intake structure consists of two symmetrically converging channels t and 2 with axis 3 of symmetry, 15 at which the tip k of the siphon 5 with valve 6 is located at the convergence point of the centers of mass of two streams, which is connected by pipelines 7 and 8 to the low pressure zone of the nozzle E through hydraulic. distributor 10, interacting with the float sensor 11 installed in the corresponding pool. In addition, the water intake structure contains an automatic shutter 12, a water intake chamber 13 with a well I, into which the siphon exit tip is submerged to the required depth and a discharge channel 15. The water intake structure works as follows. The water entering in different quantities in symmetrically converging channels 1 and 2, meeting on a common axis of symmetry 3, forms two powerful rollers, rotating in opposite directions, which push the sediments coming to the general axis of symmetry to the side walls of the structure, along the common axis of symmetry, the sediment-free zone, with which it is located; water is siphoned. At the same time, the water intake structure operates in two modes - in the interim period and in the boost mode, when there is surplus of water that is released into the lower pool through the waste shield holes. In the first case, the upstream of the facility operates as a single-chamber sump with periodic flushing, i.e .; as sediments accumulate, they are washed away by the flow of water by opening the shutter of the machine. And in the second case, the sediment is discharged continuously along with the excess water through the discharge shield hole in the lower pool of the intake structure. When the water level in the upstream is lowered, the float sensor with its weight acts through a lever on the upper valve of the hydraulic distributor and connects the internal cavity of the siphon to the atmosphere, and the air entering the internal cavity of the siphon partially discharges it, j decreases and the water level in the upstream rises to a predetermined value. When the water level rises in construction, the float sensor acts through the lever on the lower valve of the hydraulic distributor and connects the inner strips A siphon with a zone of negative pressure nozzle, as a result of which a part of the air siphon | i is sucked | i the flow increases. If the capacity of the siphon has reached its maximum, water will begin to flow when it is sucked into the valve, in which a float weighed by water will close the inlet. the pipeline will not allow water to flow to the hydraulic distributor. If the flow rate in the river exceeds the maximum siphon flow rate, the water level in the upstream reaches the automatic shutter, as the float gauge of the shutter is set to 0 above the control siphon level, 01-0.02 m, which will make it possible in automatic mode to produce water intake from the river from the minimum to maximum siphon capacity. Thus, the use of the water intake structure of the proposed design will reduce the flow of sediment into the discharge-conduit. Invention The water intake structure, which includes two symmetrically converging channels, communicated in the descent zone with the discharge conduit, and a discharge channel, characterized in that, in order to reduce sediment flow into the discharge conduit, the symmetric converging channels are communicated with the discharge conduit by siphon. Sources of information taken into account during the examination 1. Sobolyn G.V. Protection of structures on rivers and canals from sediment. Frunze. 1968, p. fig 52. 2. USSR inventor's certificate No. 85300 (, class, E 0213 9/0, 1980 (prototype).

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Claims (1)

Claim When the water level in the structure rises, the float sensor acts through the lever on the lower valve of the hydraulic distributor and the water intake structure, which includes two symmetrically converging channels communicated in the convergence zone with the outlet conduit, and a discharge channel, characterized in that, in order to reduce the flow sediment into the outlet conduit, symmetrically converging channels communicated with the outlet conduit via a siphon.