RU2019868C1 - Hydraulic stabilizer of water flow rate in open canal - Google Patents

Abstract

FIELD: hydraulic melioration works. SUBSTANCE: gate is provided with container converging towards its bottom, a two-arm lever and a counterweight. EFFECT: higher accuracy in stabilization of water flow rate and wider possibilities for control of stabilizer. 2 dwg

Description

 The invention relates to the automation of irrigation systems and can find application for the automatic distribution of irrigation water on the channels of inter-farm and on-farm use.

 Known for this stabilizer water flow for channel channels, including cantilever curvilinear flaps pivotally attached to the longitudinal axes to the bottom of the tray and having a drive [1]. The disadvantage of this design is the possibility of its use only on channels with significant command and the need to change the installation of valves, affecting the local hydraulic flow resistance, flow coefficient and the area of this hole with significant changes in the water level in the main channel.

 The closest in technical essence to the proposed device is a water flow stabilizer, consisting of a flat vertical shutter pivotally connected to a pivot wall at the lower rib, which is connected by screws to a float moving along the screws and responding to changes in the water level in the upper pool, changing when this is the position of the rotary wall, which causes a change in the coefficient of vertical compression of the water flow behind the shutter and the magnitude of the opening with the shutter stationary [2].

The disadvantages of this device are as follows: at angles of change of the rotary wall close to 30 ^about and less than the corresponding minimum water levels in the channel, an adhering wall effect to the bottom of the channel occurs. This requires the manufacture of a large float and, accordingly, leads to additional difficulties in ensuring normal approaching conditions; increased requirements are imposed for intensive changes in the water level in the upper pool, as well as for the presence of floating debris and sediment deposition. This stabilizer requires compliance with very strict ratios between the values of the opening of the shutter and the radius of the float and when changing the setpoint, as a rule, a simultaneous change in these two parameters is required.

 The purpose of the invention is to improve the accuracy of stabilizing the flow of water in the downstream and expanding the ability to control the stabilizer.

 This is achieved due to the fact that the flat shutter of the hydraulic stabilizer with a flow guide curved plate fixed through an axis to the lower edge of the shutter with the possibility of rotation in the vertical longitudinal plane, is equipped with a container tapering to the lower part, articulated to the upper surface of the plate, with a two-arm mounted on the shutter, and a counterweight located on one shoulder of the lever with the possibility of axial movement and fixation, and the container is suspended by means of an articulated rod to ugomu lever arm, and its cavity is connected a flexible pipe with Headwater.

 In FIG. 1 and FIG. 2 shows the flow rate stabilizer.

 It contains a device that secures it to the shutter 2 from the side of the lower edge. The curvilinear plate 3 by means of the hinge 4 and the hinge 5 is connected respectively to the fastening 1 and the regulating capacity 6 mounted on a vertical bolt using an external rod 7, which provides a movable connection of the capacity-lever-counterweight system, providing balancing by changing the position of the counterweight 8 along the lever 9 this system in the absence of water in the tank.

 The flow of water into the tank is ensured by a flexible pipe 10, the outflow is through the hole 11, and the flow of incoming water is greater than through the hole 11. Protection of the tank from sediment and floating bodies is provided by the filter 12.

 Hydraulic flow rate stabilizer works as follows. Water from the upstream flows from under the shutter 2 to the drain, while the curved plate 3 provides favorable hydraulic flow conditions. With an increase in the water level in the upper pool through the pipe 10, the water level in the tank (C) increases and due to the increase in the weight of the tank, the pressure on the plate 3 increases, which reduces the flow cross section in the stream compression zone. Thus, by increasing the coefficient of vertical compression of the flow, the flow rate of water to the outlet is reduced. Moreover, the triangular shape of the tank provides a linear change in the pressure on the plate with a change in the water level in it. In the case of flooded outflow of water from the downstream side, the hydrostatic pressure on the tank due to the water level B reduces the pressure of the tank on the plate and thereby decreases the vertical compression of the flow, that is, it increases the flow rate with increasing flooding, thereby stabilizing the flow of water in the downstream.

Claims (1)

 HYDRAULIC WATER CONSUMPTION STABILIZER IN AN OPEN CHANNEL, including a flat shutter placed across the channel between the upper and lower concretes with a curved flow guide axially fixed to the lower edge of the shutter and rotatable in a vertical longitudinal gap, characterized in that it is provided with a tapering part a capacity pivotally attached to the upper surface of the plate, a two-arm lever mounted on the bolt, and a counterweight located on one shoulder of the lever with the possibility of w axial movement and fixing, wherein the container is suspended via a hinge rod to the other lever arm, and its cavity is connected with a flexible pipe headwater.

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