SU503216A1 - Device for automatic regulation of the water level in the irrigation canal - Google Patents

Description

one

The invention relates to the field of water level control in hydraulic structures and can be used in cascade control systems for water level and flow in the irrigation canal.

The known devices for the automatic regulation of the water level in the irrigation canal, comprising sensors for the lower and upper pools associated with the inputs of the limiters-switches of the successive sections of the channel. The level adjusters of the upstream downstream are connected to the autoregulator connected to the electric drive of the shutter. However, these devices do not provide the required reliability at emergency levels of water in the canal and accuracy of operation, since it does not limit consumption of water to the consumers that exceed the calculated ones.

To improve reliability and accuracy in the proposed device, the level sensors of the upper and lower pools are connected via one changeover contact of the limiter switch to one i.3 inputs of auto regulators, to the other input of which, through the other changeover contact, level adjusters of the upper and lower pools are connected. the downstream is connected to the inputs of the limiter - switch and autoregulator of the subsequent section of the channel.

The drawing shows schematically the described device.

The control shutter 1 is controlled by the actuator 2 according to the commands of the autoregulator 3, one of the inputs of which is connected to the sensors 4 and 5 of the upper and lower levels, respectively. bypass through changeover contacts 6 of the executive relay of the limiter - switch 7. The signals of the sensor 4 level upper

the pool is also fed to the input of the limiter switch 7, and the signals from the downstream level sensor 5 are fed to the input of the switch limiter of the subsequent channel section. The sets of 8 and 9 levels, respectively, of the upper and lower pools, through another changeover contact 10 of the limit switch-switch 7 are connected to the second input of the autoregulator 3. The device operates as follows.

With the usual smooth regulation, the autoregulator, 3 acts on the actuator 2 of the shutter 1, changing the size of its culvert in case of a mismatch in the water level signaled by the level sensor 5

downstream, the level value previously set by the downstream 9 level adjuster. When the maximum upstream maximum level exceeds the maximum level, the signal of the level 4 sensor causes a voltage at the input of the limiter switch 7 to reach the limit threshold, triggering its actuating relay that switches the autoregulator 3 to the level sensor 4 and the setpoint Level 8 upstream. Thus, during the period of the over-calculated excess of the level, the auto-regulator switches from the downstream level control mode to the upstream limit control mode and upstream level control, making a mixed control.

Claims (1)

Invention Formula A device for automatically controlling the level of water in the irrigation canal, containing sensors for the upper and lower pools, limit switches for the number of sections of the channel, level adjusters for the upper and lower pools, an auto-regulator connected to the electric drive of the gate, characterized in that, in order to increase reliability and the accuracy of the device, in it the sensors of the levels of the upper and lower pools through a changeover contact of the limiter switch are connected to one of the inputs of the autoregulator, to the other input of which via the other changeover contact level setting elements are connected the upper and lower reach, and the sensor layer downstream connected to the inputs of slicer -pereklyuchatel and autoregulation torus subsequent duct section.   7 .-. .71 gOp - / 7/77