RU1783488C - Head water level controller - Google Patents

Abstract

The invention relates to hydraulic engineering and can be used in water intake and retaining structures. The purpose of the invention is to increase the reliability of the controller. The essence of the invention lies in the fact that in the regulator, containing a flat shield 1 suspended on a horizontal axis of rotation 2 with consoles 3, on which are suspended a load of IvoTGyos 4, a spillway tray 6 with a curvilinear head, and also an air supply pipe 7 , additionally made protrusion 8 in the form of an additional drain tray installed in the opening of a flat shield 1 from the downstream side. 1 ill. 7 j. . x 4 x w sa

Description

The invention relates to hydraulic engineering and can be used in water intake and retaining structures.

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

The operation of the device is illustrated in the diagram in the drawing.

The level controller comprises a flat shield 1 suspended on a horizontal axis of rotation 2 and connected rigidly to consoles 3 on which a counterweight load 4 is suspended. A flat shield 1 is mounted on a discharge opening 5. The device also comprises a drainage tray 6 having a longitudinal section curved overflow trap and rigidly installed in the opening of the flat shield 1 with an inclination towards the upstream side, moreover, the upper edge of the overflow tray 6 is placed at a predetermined water level mark of the upper pool with the regulator closed, The angle of inclination of the spillway b and the form of its execution are determined from the condition that the resulting force P of the hydrostatic pressure of the water passes through the rotation axis 2, which makes it possible to eliminate completely or to a greater extent the influence of the water pressure forces acting on the spillway 6 during its operation. In addition, an air supply pipe 7 is brought under the spillway edge of the tray b, the spillway 6 has a protrusion 8 in the form of an additional drain tray installed in the opening of the flat shield 1 from the downstream side

The operation of the level regulator is based on the well-known principle of balancing the moments of forces acting on the moving parts of the regulator - a flat shield 1, a load-counterweight 4. Moreover, the moment of rotation from the action of the resulting force P of the water pressure on the spillway tray 6, due to the accepted conditions, can not be taken into account, since its value is equal to zero, or it is incommensurably small compared with the values of other acting moments of forces. When the flow rate of the channel entering the structure is less than the flow rate of the discharge channel, the filling in the structure will be less In this case, the total moment from the weight of the flat shield 1 and the counterweight load 4 will be greater than the moment from the force of the water pressure on the flat shield 1, the discharge opening 5 will be blocked by the flat shield 1, i.e., the level regulator will be in the lowest position. When the flow rate of the channel entering the structure is less than the flow rate of the outlet channel, the filling in the structure will be less than the calculated one, while the total moment of the weight of the flat shield 1 and the counterweight group 4 will be more than the moment of the force of the water pressure on the flat shield 1, the discharge hole

5 will be covered by a flat shield 1, i.e., the level controller will be in its lowest position, covering the entire span of the structure. When entering the construction of excess water consumption

0, the equality of moments is violated, and under the influence of the pressure of the water, the regulator starts to open, discharging the excess water flow into the downstream of the structure. In this case, the upper edge of the spillway channel 6 will begin to fall below the water level of the upper pool (see Figs. 1a, b), thereby providing discharge of the upper layers of fin water into the lower pool of the structure. As the costs increase, the regulator will increase its opening, while the upper edge of the spillway b will sink deeper and deeper under the water level of the upper pool, thereby increasing the discharge of water consumption into the lower pool of the structure along with

5 by the fin, which, around the curvilinear outline of the head of the spillway, will 1 pass freely into the lower pool of the structure. In this case, the flow of water entering the spillway tray will be

0 are discarded by the protrusion 8 (see Fig. 1a, b) into the lower pool of the structure, and the irrigated layer of water, tearing away from the protrusion 8, will not touch the plane of the shield 1 and its stiffeners (crossbars). With increase

5 excess water discharges discharged through the regulator will also increase the water flow rate, which will affect the wetted edges of the shutter-regulator

0 impact on the operation of the entire device. The most dangerous area is the zone located under the spillway of the regulator, the outline of which contributes to the formation of a vacuum. To exclude the formation of vacuum, an air supply pipe 7 was introduced into the design of the regulator, which, during the operation of the regulator, supplies air to the reduced pressure zone under the spillway 6. The effectiveness of the proposed design in comparison with the prototype is as follows. that the overflowing layer of water, tearing away from the protrusion 8, will not touch the plane of the shield 1 and its stiffness elements (crossbars), which

5 will eliminate corrosion of welds, beams and the plane of the shield 1.

Claims (1)

SUMMARY OF THE INVENTION An upstream level regulator comprising a flat shield suspended from a horizontal axis of rotation, having consoles rigidly connected to it, on the thimble head, as well as the air inlets, are suspended a load-counterweight, a rigid pipe connected with the head mounted in the opening of the flat shield of the dump tray, characterized in that it is inclined towards the upper side , water, in order to increase the reliability of the regulator - cream the tray, the top edge of which5 torus it contains a protrusion in the form of an additional, when the regulator is closed, a drain drain tray installed in the puppy at a predetermined level mark of the upper opening of the flat panel with low beef torons and which has a curved beef,