SU537164A1 - Water level regulation system between hydraulic structures - Google Patents

Description

level 24 in the downstream and changing the weighing force to Float 17. Raising level 21 causes lowering level 24 and, conversely, lowering level 21 - raising level 24, because the balance of the balance arm 15 and valve 19 is disturbed or increases the opening of the hole 20 and breaks the vacuum in siphon 5, whereby the shutter 1 closes or closes the opening 20 and the shutter increases the opening. The vacuum in the float 12 depends on the operation of the siphon 25 of the lower structure, equipped with a double siphon gate 26. The siphon 25 is connected by a pneumatic tubing 14 to a float 12. A rise of level 27 in front of the lower structure above the ridge of the siphon 25 causes it to charge and an increase in vacuum in the float 12. The feedback between the structures is carried out by a pneumatic tubing 14.

In order to protect the upper side of each structure from overflowing above the maximum level 28, a double siphon 29 is installed in the gate. The double siphon 5 performs protection from the upper pool dips below level 30, since knee-6 is located at level 31, at which siphon 5 stops emptying the water from the reservoir tank 1. The siphon 32 with the pvemotruboprovod 33 ensures the operation of the next section of the cascade, located upstream.

The system works as follows.

When the canal section between water gates 1 and 26 is filled with water, the siphon 25 does not work and there is no vacuum in the float 12, levels 21 and 22 are at the same level. The float 17 with its weight holds the valve 19 in the closed position.

When the water level in front of the shutter 1 exceeds the level of 30 through elbow 6, the drain pipe 7 and elbow 8, water enters the lower reach. The vacuum in the knee 6 raises the water in the pipe 4, the dual siphon 5 is charged and pumps the water out of the gate 1. The water level 23 drops and the shutter 1 opens. The canal section is filled between the buildings with valves 1 and 26. At the same time, the valve 26 is in the closed position before the start of its dual siphon. The filling of the channel section will continue until the level 27 exceeds the level at which the siphon 25 is charged. If the siphon 25 starts to charge, a vacuum is formed in it and air is sucked out of the float by the pneumatic pipe 14. The liquid level 21 in the float 12 rises above the level 22 until the weight of the balance balances the rocker arm 15. The valve 19 opens the hole 20, through the pneumatic tubing 9, the air enters the dual siphon 5 and partially discharges it. The capacity of the siphon 5 is reduced, and the shutter begins to descend, reducing the flow of water to the downstream. Levels 24 and 27 in the channel begin to fall, discharging the siphon 25 and covering the valve 19. When water consumption decreases, level 27 rises and charges siphon 25, which leads to an increase in vacuum in the float 12 and closure of gate 1. If consumers increase the flow rate, then 27 is reduced, the siphon 25 is discharged and the shutter 1 is raised, increasing the water flow.

The structure is protected from overfilling of the headwater by double siphon 29, which is activated independently of the command of sensor 10 if the level exceeds the maximum level mark 28.

Adjustment to the minimum amplitude of level 27 oscillations is made by changing the diameter of the hole 13 in the float 12 and throttling the pneumatic tubing 14.

The proposed control system provides the maximum distance between adjacent hydraulic structures, which allows reducing the volume of reserve tanks.

Claims (2)

1.Avt. St. No. 257785, cl. E 02B 13/02, 1968. 2. Materials of the All-Union Workshop on the Automation of Irrigation Systems, 1967. Vol. 3, p. 28 (prototype). 33 2 d 8 16 20 13 12 1 FIG. one 1 27 26 25 P