SU930284A1 - Regulator of water level in hydroengineering structure pools - Google Patents

Description

I

The invention relates to hydraulic engineering and is intended for automatic regulation of water levels in pools (mainly in the canals of valley zones).

A device is known for regulating water levels in the pools of hydraulic engineering structures, comprising a gate, the capacity of which serves as a working chamber, combining functions and an actuating element. The shutter is balanced by the counterweight. The working chamber communicates with both pools by means of an inlet and an outlet, the discharge cross-sectional area being larger than the cross-sectional area of the inlet Q.

The disadvantage of this device is low reliability due to the fact that the device does not protect the upper reach from overflow, and due to partial breakdowns of the closed hydraulic system of level sensors and the valve blocking

outlet. The disadvantages also include the structural complexity of execution.

The closest technical solution to the present invention is a device for adjusting water levels in pools, containing a sector valve with a hermetic chamber and a counterweight to balance the moments acting on the valve and the hydraulic system of sensors connected to the inlet and outlet valves in a sector valve 2

The disadvantage of this device

IS is the design complexity and low reliability of the hydraulic sensor system.

The purpose of the invention is to increase the reliability and simplify the controller.

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Claims (2)

The goal is achieved by the fact that in a level controller containing a sector valve mounted on a horizontal axis of rotation with inlet and outlet pipes, the inlet and outlet pipes are made in the form of a Venturi nozzle and its zones of constriction, respectively, with the first and second pipes, and the first and second pipelines are located at elevations of a given level of the lower and upper tails, respectively. The drawing shows the proposed controller. The regulator includes a sector gate 1, mounted on a horizontal axis of rotation 2, in which inlet 3 and outlet 4 pa are installed: tubes made in the form of a venturi valve. To the narrowing of the Venturi nozzle outlet, the nozzle 4 is connected to the pipeline 5, the output end of which is set at the level of the regulated headwater 6, and to the narrowing of the Venturi nozzle the inlet pipe 3 is connected to the pipeline 7, the output end of which is set at the level of the adjustable lower reach 8 The regulator works as follows. If the water level of the lower pool is lower than the set mark on which the outlet end of the pipeline 7 is installed, to narrow the benturi nozzle of the outlet 4, air is sucked through the pipeline 5, reducing the flow rate, which is determined by the formula Q - (uwiZgCZH hg), (1) where Q P is the fluid flow through the venturi nozzle; hydraulic resistance coefficient; nozzle section area. acceleration of free fall; level difference; the magnitude of the vacuum in the narrowing of the Venturi nozzle. When atmospheric air flows through the pipeline into the narrowing of the Venturi nozzle, the magnitude hg in formula (1) becomes zero and the flow through the venturi decreases. In the case when the end of the pipeline connected to the Venturi nozzle is in water and the access of atmospheric air is stopped, Formula (1) reaches its maximum value, thereby increasing the flow of water through the SOPLO in the case of atmospheric air entering the narrowing of the Venturi nozzle of the outlet 4 control is carried out downstream. When the water level in the downstream increases, the outlet end of the pipeline 7 is closed with a layer of water, the flow of atmospheric air into the narrowing of the vent nozzle stops, which causes an increase in flow through the inlet port 3. The working chamber of the sector gate is filled with water, under the weight of which the sector gate 1.plugs , reducing the flow of water into the downstream 8. As the water level in the downstream 8 decreases, the atmospheric air enters the constriction of the Venturi nozzle of the inlet manifold 3, reducing the flow rate one water through the nozzle. Since the cross-sectional area of the outlet nozzle 4 is larger than the cross-sectional area of the inlet nozzle 3, the working chamber of the sector shutter is empty and the sector shutter 1 is raised, thereby increasing the flow of water to the lower reach, which causes an increase in its level. In case of overflow of the upper pool 6, the outlet end of the pipeline 5 is closed with water and the flow of atmospheric air into the nozzle constriction stops, thereby increasing the flow of water through the outlet 4. As the cross-sectional area of the outlet 4 is larger than the cross-sectional area of the inlet valve 1 Empty regardless of downstream water level. The sectoral shutter 1 rises and passes excess water into the downstream. The proposed controller is characterized by simplicity of design, manufacturability, a small number of parts and the lack of a hydraulic sensor system, which significantly increases the reliability of the controller. The cost of manufacturing the proposed controller is 30% less than the cost of the known. The invention The level controller: water in the pools of hydraulic structures, containing a sector gate mounted on a horizontal axis of rotation inlet and outlet pipes, characterized in that, in order to increase the reliability and simplify the regulator, the inlet and outlet pipes are made in the form of a Venturi nozzle and its constriction zones, respectively, with the first and second pipes, and the ends of the first and second pipelines are located 302846 at elevations of a given level, respectively, of the lower and upper pools. Sources of information taken into account in the examination of S 1. I Bochkarev, V. Hydroaught in irrigation M., Kolos 1978, p. 67. 2. Bochkarev I, V. Hydroautomatic in irrigation. M., Kolos, 1978, p. 68 (prototype) /////////////////////////// g ////////////////////// //////////// // //////