SU885980A1 - Downstream level regulator for hydrotechnical structures - Google Patents

Description

(54) DOWNHEAD LEVEL REGULATOR IN HYDROTECHNICAL

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The invention relates to hydraulic engineering supporting structures and can be used as a regulator of the lower pool level in hydraulic structures on tubular outlets in irrigation systems with a heavy overhead direction.

A device is known for automatically regulating the water levels of the upstream of an irrigation canal, consisting of a supply line through which water from the headwater enters the well through the outlet nozzle, and through the outlet of this line into the additional well in which the control float is located, connected by a flexible connection with the gate. The shutter closes the flow hole located in the wall of the well, which on the downstream side is blocked by a floating shutter. An outlet opening is located in the wall of the additional well above the downstream level. To shut off the water supply to the well, as well as to forcibly lower the latches.

FACILITIES

cylinder output part of the inlet pipeline is equipped with valve C.

Also known is the hydraulic autoregulator of the upstream level for mountain water intake assemblies, consisting of two segment gates equipped with additional devices in the form of floats and counterweights. As long as the water level in the upper pool is lower than the target, the lower gate under the action of its own weight and the weight of the corrector does not drop down and the upper gate rises to the upper position (closed). When the horizon in the upstream reaches, water flows through the leveling device opening and the supply pipeline enters the hull. Under the action of the repulsive force of the float, the lower bolt begins to rise, and the upper one, connected to the float, lowers 2.

The disadvantages of this regulator include the complexity, the presence of a large

20 the number of cables, rollers, floats, which leads to a rapid exit from it, as well as inaccuracy of work in the presence of sediment.

The purpose of the invention is to increase the reliability of the controller when there is abundant sediment in the flow. The goal is achieved by the fact that in the downstream level controller in hydraulic structures containing a shield, a flexible shell fixed to it by one edge and a level sensor is vertically mounted in the bottom of the conduit between the upper and lower pools, a wall with a first hole that is soldered in it, and a chamber fixed to the wall on the side of the lower outlet, is divided into two cavities by a partition, on which a The apan is connected to the level sensor and communicates with the lower pool by a second hole made in the upper chamber cavity, the lower cavity of which is connected to the first hole, the other edge of the flexible shell and the shield are hinged to the wall, downstream side.

Shield in the closed position forms with. dawn angle oi. 40

FIG. 1 is a schematic representation of the proposed controller, in the closed position; in fig. 2 - the same, side view, in the open position.

The downstream level regulator consists of a rigid shield 1 attached by pyrrhn 2 to 1/3 of the shield height. A sheath 3 is attached to the upper edge of the shield 1, the other edge of which is connected to the vertical wall 4. Water in the formed tank 5 flows through a calibrated turn 6. The tank 5 is emptied through the first outgrowth 7, water from which enters the chamber 8, inside of which there is a partition 9 with an opening 10. The flow passing through the opening is regulated by a valve 11 mounted on the saddle 12. The valve I is connected with the stem 13 tchikom layer 14. The chamber 8 is emptied through the vent 15.

The regulator works as follows.

When the water level in the downstream is lowered, the level sensor floats up and opens the opening 10. Capacity 5 is emptied through the first opening 7 and openings 10 and 15. In this case, a pressure difference appears between the tank and the upstream. The shell begins to sag, and the shield 1 is rotated, closing the bottom opening. The more the level sensor pops up, the more the opening 10 is opened and the capacity 5 is more empty. At the same time, the water is discharged to the lower pool. The target downstream level can be changed by moving

14 gauge gauge across the slot 13. With high water levels in the downstream, the shield 1 can completely block the bottom hole (Fig. 1). Before the sediment regulator, Skopivpgas can not place it opening, as in this case the lower part of the regulator turns in the direction of sediment movement. In the same way, the headwater can be washed from the accumulation of flooded vessels.

The use of a shield, the lower part of which rotates in the direction of the movement of sediments, allows to increase the reliability of the operation of the regulating structure, to eliminate the slopes from its siltation. The constructor has practically no hinges (except for one), which also increases the reliability of its work. The intake of clarified water from the upstream to the calibrated orifice 6 also contributes to this. The economic efficiency resulting from the use of such a structure consists of reducing capital expenditures during construction by 1.9 times and reducing operational costs by 1.4 times.

Claims (2)

1. The downstream level regulator in hydraulic structures, containing a shield, a flexible shell attached to it with one edge and a level sensor, is also distinguished by the fact that, in order to increase the reliability of the regulator in the presence of sediments, it contains a vertically installed 5 bottom of the conduit between the upper and lower pools, a wall with a first hole filled in and fixed on the wall of the lower reach on the wall, a chamber divided into two cavities with a partition on which the valve connected to the level sensor is installed and communicated with the second downstream hole, vypolnennym in the upper cavity of the chamber, the lower cavity of which is communicated with the first hole, with the other edge the flexible shell and the shield are pivotally connected to the wall, and the shield is designed so that it can be rotated towards the lower pool. 2. The regulator according to claim 1, characterized in that the shield in the closed position forms a. dawn angle oi:. 40 ° Sources of information taken into account in the examination 1. USSR author's certificate №414358, cl. E 02 B 7/42, 1974. 2. USSR author's certificate number 376521, cl. E 02 B 7/42, 1972 (prototype).