SU1260439A1 - Method of distributing water at canal portion confined by stationary structures - Google Patents

Description

The invention relates to methods of distributing and supplying water from open channels to multi-support frontal sprinkler machines in motion for irrigation of farm land in areas with a large slope.

The purpose of the invention is to save energy, building materials, reduce capital investment and operating costs.

FIG. 1 is a diagram of water distribution in the canal section when the machine is moving from top to bottom; FIG. 2 the same, when moving upwards.

Channel 1 with a large slope of the bottom (Fig. 1) is submerged by straps of float type into short sections (pools) with reserve tanks. The jumpers provide mechanical locks for the position, and the flow rate of the water supplied to the channel, filling or drawdown of reserve tanks in the pools, fixing the position of the jumpers and initial depths of the pools of the channel pools is determined depending on the direction of movement of the sprinkler 2.

When the sprinkler is moving downstream (Fig. 1), all the pools are filled similarly to the first (up to the AB line). Passing along with the sprinkler, the first pool, a water intake device (not shown), floating on the pontoon, slides over bridge 3, submerging it below the water level, where it is held by means of a mechanical lock. Fixing the jumper in the submerged position frees up the required area of the living section of the channel for the continuous supply of water to the water intake device of the sprinkler. A flow rate Qg is supplied to the channel through the head structure with an autoregulator of flow rate 4, a slightly lower flow rate Q of the sprinkler. As a result, during the movement of the sprinkler on the first bay, the reserve volume VV, is generated, thus, in the cross-section of the jumper, locking is eliminated, which is usually accompanied by idle

discharge of water equal to the specified volume.

This process is repeated in each pool. Dashed line ACD

It characterizes the depth of water in the water intake sections and is simultaneously the trajectory of the pontoon movement of the diverter intake device.

After passing by the full-length canal sprinkler, all the bridges are lowered and fixed in this position, and the water levels in pools are shown in FIG. 2

the continuous broken line DKMP.C of this moment begins the movement of the sprinkler in the opposite direction - from point C against the current

modified flow rate Q "iodine-water

in the head of the channel; somewhat higher than the flow rate of the Q, sprinkler (QA,).

During the passage of the sprinkler machine the length of the end of the pool due to the fact

what's the water level in this

the buoy rises to point E. The water intake device runs over the immersed jumper 3 and releases it from the retainer. After the passage

machine jumper floats to point E and with further movement of the sprinkler machine due to the continued flow into the channel forced flow Of Q d, the water level

at the penultimate side, rises to the top along with a floating jumper. This process is repeated cyclically in each by-stream and with each switch.

five

0

Thus, the proposed method of water distribution during the movement of the sprinkler against the flow also excludes sluicing in the cross sections of the bridges, eliminating idle discharges of irrigation water with a total volume of, H ensures timely supply of water to the sprinkler. The dashed line t) BA characterizes the water depths in the water intake sections and is simultaneously the trajectory of the pontoon movement of the intake device of the sprinkler.

2

Editor M.Dshyn

Compiled by M. Khrabrov Tehred A. Kravchuk

Order 5196/24

Circulation 641Subscribe

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Proofreader M.Sharoshi

Claims (1)

METHOD FOR DISTRIBUTING WATER AT A CANAL SECTION LIMITED TO STATIONARY STRUCTURES, including creating reserve volumes of water and withdrawing water from the canal with a floating intake device of the sprinkler, characterized in that, in order to save energy, construction materials and reduce capital investments operating costs, the reserve volume of water is dispersed along the length of the plot using submersible bridges of the float type, while flowing the sprinkler from top to bottom, flow water, smaller than the flow rate of the machine, and as it moves along, the jumpers are i immersed under the water level and fixed, and when the sprinkler moves from bottom to top, a water flow rate greater than the flow rate of the machine is supplied to the channel, and the jumpers are sequentially freed clamps. ' SU ,,, 1260439