RU2205259C2 - Device for control of water level in hydraulic structures - Google Patents

Abstract

FIELD: hydraulic engineering; applicable in control of water level in irrigation canals. SUBSTANCE: device includes water displacing gate with horizontal hinge. Water displacing gate is made in form of drum with blades. Calibrated orifices for water and air located opposite to one another on drum element. Ends of horizontal hinge are secured in guides for free motion in vertical plane. With variation of water level to one side or another, filling or emptying of rotating gate internal cavity takes place. Gate moves over guides upwards or downward to change flow area for water passage. With water intake discontinued, difference in level heights disappears and gate cavity is filled with water. Gate is sully sunk. EFFECT: reduced water consumption in irrigation. 2 cl, 4 dwg

Description

 The invention relates to hydraulic engineering and can be used to control water levels in irrigation canals.

 Known devices for regulating water levels in hydraulic structures, including a displacement shutter, a horizontal axis of rotation and calibrated holes for water and air (USSR Author's Certificate 589327, MKI E 02 B 13/00, 1978).

 However, the known displacement gates are structurally complex and regulate the level when passing water in one direction.

 In the proposed device, which includes a displacement shutter, a horizontal axis of rotation and calibrated holes for water and air, a displacement shutter is made in the form of a drum with blades, calibrated holes for water and air are made on the forming surface of the drum opposite each other, and the horizontal axis of rotation is fixed at its ends in guides with the possibility of free movement in a vertical plane.

 In addition, the horizontal axis of rotation is associated with a water flow meter.

 Figure 1 shows a cross section of an irrigation canal with the proposed device for regulating water levels in an irrigation canal, Fig.2 is a longitudinal section, Fig.3 is a structural diagram of a displacement shutter, Fig.4 is a view A in Fig. .1.

 The proposed device includes a displacement shutter 1, the horizontal axis of rotation 2. The shutter 1 is made in the form of a drum with blades 3, the inner cavity 4 of which is provided with calibrated holes 5 and 6 located on the forming surface of the drum opposite each other. The horizontal axis of rotation is fixed in the guides 7 and 8 with the possibility of free movement in the vertical plane and can be connected with a water flow meter 9. In addition, the device can be equipped with a load-lifting screw mechanism 10.

 The device operates as follows.

 The displacement shutter 1 rotates on the horizontal axis 2 using the blades 3 in the direction of water intake, while the horizontal axis 2 freely moves in the vertical plane in the guides 7 and 8. When the drum rotates, the calibrated holes 5 and 6 are alternately immersed in water or communicate with the atmosphere. When water is taken in the channel, a difference in water levels "Z" is formed before and after the shutter. Therefore, when the calibrated holes 5 are immersed in water, water from the upper pool fills the inner cavity 4 of the drum, since at this time the other calibrated holes 6 communicate with the atmosphere. When the holes 5 get into the downstream, the cavity 4 is emptied and water is replaced by air through the holes 6. The holes 5 and 6 are calibrated so as to maintain a given drop in water levels H at the corresponding water flow from the channel. Therefore, if the level difference changes in one direction or another, filling or emptying of the inner cavity 4 of the rotary shutter occurs. As a result, the shutter 1 moves along the guides 7 and 8 up or down, increasing or decreasing the flow area for water passage. When water withdrawal ceases, the difference in water levels in the channel disappears. In this case, the inner cavity 4 of the shutter 1 is filled with water to the maximum volume. The shutter 1 is completely immersed in water, changing the flow area to allow a minimum amount of water to pass through.

 By the number of perfect shutter revolutions during the passage of water, it is possible to keep track of the water flow in each section of the channel. For this, the horizontal axis of rotation 2 is connected with the flow meter 9.

 When water is taken from the channel section to the gate, a difference in water levels N will also occur. As a result, the gate 1 will rotate in the opposite direction, passing water from the lower section of the channel to the upper. This allows not to discharge water from the lower part of the canal, but to use it for irrigation and thereby reduce the water flow used during irrigation. The screw mechanism 10 is used to lift the drum during its maintenance and repair.

Claims (2)

 1. Device for regulating the water level in hydraulic structures, including a displacement valve, a horizontal axis of rotation and calibrated holes for water and air, characterized in that the displacement valve is made in the form of a drum with blades, calibrated holes for water and air are made on the forming surface of the drum opposite each other, and the horizontal axis of rotation with its ends is fixed in the guides with the possibility of free movement in the vertical plane.  2. The device according to claim 1, characterized in that the horizontal axis of rotation is connected with a water flow meter.

Images