SU809089A1 - Head water level regulator - Google Patents

Description

(54) TOP LEVEL REGULATOR

The invention relates to hydraulic structures and can be used as a headwater level controller for irrigation systems. A gate of a hydraulic structure is known, consisting of a flat shield mounted on a horizontal axis and made with a float fixed on it and a tank open from above, the side walls of which have curvilinear upper edges. There is an opening in the shield for filling the container with water. Under the action of hydrostatic pressure on a flat panel, he. rotates around an axis and occupies a certain open position. The tank is then filled with water through the hole and as soon as the adjustable water level rises, the flat panel rotates 1. The disadvantage of this design is the need for a step at the place of its installation, as well as the complexity of sealing all its perimeter. The design narrows the working section of the channel, reduces the adjustment range. The closest technical solution to the proposed is the upstream level regulator, which contains a shield, which forms a tank with a hinge connected to it and between them by two flaps and a shelf rigidly connected with shore supports, provided with a seat and a valve 2. The disadvantage of this design is lack of reliability of the regulator. The purpose of the invention is to increase the reliability of the structure. and an increase in its adjustment range. The goal is achieved by the fact that a seal is located in the controller along the perimeter of the shield, the container is provided with side walls of flexible material, the valve is made in the form of a flexible membrane with holes, and the seat is in the form of a hole in the shelf. FIG. 1 shows a schematic view of the regulator in the closed state; in fig. 2 - view of the regulator from the upstream; in fig. 3 shows a section I-r1 in FIG. 2. The structure consists of the main rigid movable shield 1, two movable flaps 2 and 3, having a complex shape, and

also horizontal shelf 4. Sash 2 and 3 have the shape of a trapezoid, a smaller width equal to 0.9 channel width. Laterally formed container 5 is closed by walls b of flexible material (Fig. 3). Sash 2 and 3 do not have a seal, and the shield 1 has a seal 7 along the entire length (Fig. 3). The level control of the upper reach is made by means of a device consisting of a flexible membrane 8 with openings that do not coincide with a number of openings located on the horizontal shelf 4. The membrane 8 is connected by a rod 9 with a float 10 mixed by it (Fig. 1 ) water is discharged from the tank 5 through the opening 11. When the regulator is installed in the channel of the trapezoidal or other cross section, SH.IT 1 and flaps 2 and 3 are shaped according to the slope shape of the channel.

The design works as follows.

At normal levels of water in the channel (fkg. 1), the flexible membrane 8 is pressed and water flows through non-compatible openings into the container 5. The amount of water entering the container 5 is greater than the amount of water discharged from the opening P. The forces acting on the lower part of the shield 1 is greater than the forces acting on the upper part, and the shutter is in the closed state. When the water level rises in the upstream, the float 10 floats up, the rod 9 lifts the membrane 8. This stops the flow of water into the tank 5. The tank 5 begins to empty through the hole 11. This decreases the pressure acting on the lower part of the shield 1. At the same time, the difference pressures acting on the valves 2 and 3 from the upstream and from the tank 5. In addition, due to the absence of compaction on the doors 2 and 3 and their trapezoidal shape (Fig. 2 and 3), water enters the space between the walls of the channel and the side walls s mensche 6. Because the pressure inside the vessel 5 the shell vygibayuts inside. In this case, an additional force appears, which closes the shutter and at the same time eliminates the friction of the shell against the channel walls and their jamming between the moving flaps and. canal walls. In general, this leads to the closure of the shutter and increases the reliability of its work. In the half-open state (Fig. 1), the shutter operates

as with the expiration of the shield, and with the expiration of the ridge. At the same time, both pumps and fin are freely discharged to the downstream. In the open position of the shutter, the shutters 2 and 3 are pressed against the shutter 3. The shutter returns to its original position when the inlet opening is opened by the membrane 8.

The use in the proposed design of the movable flaps of a smaller width and without compaction makes it possible to increase the reliability of the operation of the regulator, to exclude its jamming and failure. The use of flexible side walls increases the speed of the drawdown of the structure.

The regulator can completely release the living section of the channel, works with the outflow through the weir and from under it. The construction can be applied in channels of various sections. All this increases the range of its application. The use of a simple manufacturing regulating device also increases the reliability of the facility. The use of the regulator will reduce the operating costs by 1.3-1.5 times.

Claims (2)

1. The headwater level regulator containing a shield forming a tank with 0 are hinged together by it and between each other by two leaflets and a shelf rigidly connected to the shore structures, equipped with a seat and a valve connected to a float level sensor, characterized in that, in order to increase the reliability of the regulator, there is a seal around the shield perimeter; the tank is equipped with side walls of flexible material. 2. A regulator according to claim 1, characterized in that the valve is made in the form of a flexible diaphragm with openings, and the seat is in the form of an opening in the flange. Sources of information taken into account in the examination 1. USSR author's certificate number 355290, cl. E 02 B 7/46, 1972. 2. USSR author's certificate According to the application number 2771640, cl. Е 02 В 7/42, 05.28.79 (prototype).