SU875350A1 - Device for regulating water rate of flow in hydraulic structure - Google Patents

Description

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The invention relates to devices for controlling the flow of water and irrigation systems, including rice, and can be used to equip the blocking, discharge and waste facilities.

A water outlet with a floating spillway is known, made in the form of an onboard pipe, one end of which is attached to the partition wall installed in the downstream and the other attached to the floats, providing a predetermined immersion value of its Sch.

The disadvantage of this outlet is the design of its construction and flow control.

Also known is a water-acting automatic VODOVSH1USK of constant flow, containing a flow-type, trapezoidal weir, and a nozzle into 1-weirs, attached to your floats 121.

The 3 "abundance of this outflow is a" 5th in the optional accessory device for completely stopping the flow. In addition, for his work, he needs bolts. Hydraulic drops. I The closest in technical essence to the present invention is a water meter-regulator for irrigation canals, including a cylindrical sylph, - located in the upper reach of the discharge outlet above the hole leading to the lower reach, a float float freely floating on the surface of the upper reach and supporting the bellows to compensate Mechanism 13,

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However, the known water meter-regulator has a complex structure and does not provide the necessary precision for controlling the flow, in connection with the incomplete design, compensates for its mechanism. The compensating mechanism does not fully compensate for the effect on the filler float on the bellows side of the variable force due to the individual characteristics

20 each bellows and the complexity of manufacturing a counterweight that accurately takes into account the variability of the action of the bellows on the float. In addition, the properties of the bellows and, therefore,

25 the magnitude of its effect on the filler float changes under the influence of external factors (water, air temperature) and over time, which is not taken into account

30 mechanism.

In addition, a split change is made by adjusting taps or valves located on the filling and drain openings of the filler float, which degrades the performance of the flow meter.

The purpose of the invention is to improve the accuracy and simplify the device.

This goal is achieved by the fact that the device for controlling the flow of water in a hydraulic structure, containing a first flow bellows vertically installed in the upper reach, the lower base of which is connected to the lower reach, and the upper one with an annular weir, is fitted with a second bellows that forms the first the bellows cavity, communicated through the pipe with the lower reach and through a flexible tube - with the upper reach, and the bending tube is rigidly connected with a vertical rod installed with vertical movement and fixation relative to an annular weir.

The drawing schematically shows the proposed device.

The device consists of an annular spillway 1, mounted on the first flow bellows 2, concentric to which is located the second bellows 3, which forms a cavity 4 connected to the first through a pipe 5 with a downstream 6, and through a flexible tube

7 with headwater 8.

A bracket 9 is attached to the spillway 1, on which a guide bush 10 s is installed; a clamping screw 11.

8, the creeks of the sleeve 10 move a vertical rod 12 rigidly connected to the flexible tube 7. A valve 13 is mounted on the nozzle 5.

The device works as follows.

Water overflowing through the edge of the annular overflow 1, which is buried under the level of the upper reach, falls into the bellows 2 and goes to the lower reach.

The device tends to maintain a well-defined layer of overflowing water, equal to the difference in elevations of the upper edges of the flexible tube 7 and weir 1, which uniquely determines the amount of flow through. This: allows you to calibrate the flow scale and, by moving the vertical rod 12 and setting it to a certain position, adjust the flow rate. With the rod 12, the bending tube 7 is moved.

The process of stabilization of a layer of overflowing water, equal to the difference between the marks of the upper edges of the flexible tube 7 and weir 1, proceeds as follows.

When the water levels in the upstream are below the upper edge of the flexible tube 7 and with the valve 13 open, the water drains from the cavity 4 of the bellows and the latter descends until the upper edge of the flexible tube 7 does not equal the water level. Water flows over the edge of the flexible tube 7 and enters the cavity 4 of the bellows. Since the bending tube 7 has a larger size than the opening of the nozzle 5, water enters the cavity of the 4 bellows more than it flows out. Due to the increase in pressure in cavity 4, the bellows are stretched, lifting the weir 1 with the flexible tube 7 up. As soon as the edge of the flexible tube 7 comes out of the water, the water supply to the cavity 4 stops. Reducing the bellows, which will result in a flexible edge the tube 7 will appear at the water level in the upstream.

In the cheapest process of stabilization of a given layer of iridescent water proceeds as described above.

The proposed device, in view of the elasticity of the bellows, can be used to equip the blocking and outflow structures on the irrigation canals with significant fluctuations in the water level in the upstream.

The use of this device will improve the accuracy of regulation of water flow rate.

In addition, the device allows for easier flow control. To set the required flow rate, it is enough to set the vertical rod to the locked position and the device self-adjusts to skip the specified flow rate.

Along with this, the design of the proposed device is greatly simplified.

Claims (3)

1. A device for controlling the flow of water in a hydraulic structure, containing a first flow bellows vertically installed in the upper reach, the lower base of which is connected to the lower pool, and the upper ring with an overflow This is because, in order to improve accuracy and simplify the device, a second bellows is installed concentrically to the first flow-through bellows, which forms a cavity with the first bellows, communicated via the downstream pipe and upstream through the flexible pipe. 2. The device according to claim 1, characterized in that the flexible tube is rigidly connected with a vertical stem, installed with the possibility vertical movement and fixation relative to an annular weir. Sources of information taken into account in the examination 1. USSR author's certificate 128370, cl. G 05 O 7/01, 1958. 2. Authors certificate of USSR 167394, cl. G 05 D 7/01, 1965. 3. Authors certificate of the USSR 1 129358, cl. G 05 O 7/01, 1959 (prototype).