SU1328428A1 - Arrangement for controlling water feed at canal portion - Google Patents

Abstract

The invention relates to irrigated agriculture, intended to automate water distribution in the canal areas. The purpose of the invention is to increase the accuracy of regulation and reduce the reserve volumes of the channel. This is achieved due to the speed of the perturbation of the levels. The control system 5 at the site of channel 1 with the gates 2 and 5 at the beginning and end of the section includes a sensor 6 and a level sensor 7 in the water supply stations 4. The level in the channels is adjusted by changing the channel resistance by turning the louver 1 1. 10. The signal to the regulator 10 is supplied from the adder 9. The key 14 is opened by a signal from the comparison circuit 8 of the system 5, which is streaming, of the control. Water distribution control is carried out over the area of the operation up from the place of the initial mismatch by the formation of waves of water flow levels, which allow to quickly compensate for disturbances of levels in the channel section. 1 hp ff, 2 nl. “./ SL C A; lglt .3 3 FIG.

Description

1 1328428, 2

The invention relates to irrigation and is established by starting with

in agriculture and there may be a non-site, gradually moving towards the use of water in the automation of water, and, if necessary, through the determination of the canal sections. The thermal shutter 2 can be supplied as an additional object of the invention. By increasing or decreasing the adjustment accuracy and contra-B1a using the louver 11, hydraulicizing the reserve volumes of the channel. Some resistance R of the channel in front of the figure 1 is represented by a diagram of a traveling release wave or a full set of water supply control systems

several, starting with the first, the adjacent wave velocity, increasing the speed of the channel; figure 2 is a convent. Thus, without altering the destructions of the flow level regulator, the stroke through the head gate 2,

made in the form of blinds. .install. any required settingParticle of channel 1 is limited to the negotiation mode.

with the repair structures (not yet-In the original version when installed), in the sections of which the irrigation regime was established on the site of the shutter 2 at the beginning of the site and the shutter 3 of the key 14 are open. If necessary at the end of the plot. In the section of the channel, the level before the outflow 4 of the existing outlet 4 with 2 systems (to increase the flow rate in 5 controls (indicated by a dash), on), then increasing the signal by setting the level adjusters 6 (or spreading 6, at the output of the circuit 8 comparisons of the stroke), the sensors 7 of the level (flow rate) receive a positive signal to the outlets of the outlets, the compare-matching circuit 8, which through the adjustments, adders 9, at the output of the system 25 the turner 10 turns the louver 11 against the 5 controls set by an hour hand ( figure 2), increasing and 10 flow levels at the stabilization-hydroresistance of flow, speed with an actuating element that drops, and the level increased in the form of louver 11 (figure 2). This is. In order to lower the level of the plate, the control theme 5 is also provided with a poso blinds 11 being turned clockwise between the second arrow. When the level of the gray output of the comparison circuit 8 is stabilized, the control system works in the same way as the control of the adjacent section and secondly formed the standing wave input of the adder 9 of the relay 12 for a given level in all the sections where the signal was processed according to the mismatch along the length of the section hydraulics, relay 13 of the time to move from the normal resistance of the channel of the channel of the channel of the section to the stabilization alignment: i is proportional to the difference given and (to the louver 11), key 14 and the inverto-existing levels in this alignment 15, moreover, the second input key 14re,

connected to the third output of the circuit 8 Example. Suppose that in the comparison section of the underlying control system 5 there are three outlets (upwards. For control of the shutter, 2 intermediate, middle and lower), having established the beginning of the division are 100, 120 and 90 cm levels.

for example, the time relays 16 are turned on. The corresponding values of the error signal processing level are the key. blunt from setters 6 (in setting 17 and regulator 18-controlling shutter-mode, output-signals set by set. 10, 20, and 90 cm) and with

The control unit of the water supply sensors 7 in the comparison circuit 8, the signal section of the channel operates the following zero-output channels,

shimm way. gQ In relation to the systems 5 control, there are installations on the site, their blocks (key 14, summed up mode with level H, box 9, etc.) are used to accept the terms

That corresponds to the hydraulic upper, middle and lower corresponding resistances of the channel with a fixed separation of them along the flow of water

Mr. flow through the shutter 2, pro-gg (figure 1),

in portions of the flow rate V on Let reserve volumes on the site

live section of the channel. When the change is absent, and in the lower vodovshuske

hydraulic resistance measurement - it is necessary to raise the level to 105 cm,

The level is H, and the level data for which the output signal of the lower level adjuster 6 is set to 105 cm. In this case, an unbalance signal appears at the output of the lower equalizing circuit 8; equal to 15 cm, which through the lower adders 9, the controller 10 rotates the lower louvers 11 counterclockwise. The regulator 10 in the lower part of the section raises the level in the lower inlet of the outlet, for example, up to 100 cm (the restriction is associated, for example, with the design features of the regulator louver).

Simultaneously with the arrival of the error signal - 15 cm to the lower adder 9, the same signal goes to the average signal processing time relay 12 and the middle key 14. At the input of the middle key 14 allowing, the signal from the average time relay 12 appears through the error matching time lower controller 10, since the average end-of-life relay is put into operation, prohibiting the passage of a signal only after the travel time from the middle to the lower controllers, the longer the time required for the mismatch of the lower regulator 10. After opening the middle key 14 through it passes the error signal from the lower regulator, equal to 5 cm, since by this time the level in the lower regulator rises to 100 cm. Passage through the middle inverter 15, this signal becomes equal to +5 cm and accordingly works out the average by adjusting the controller 10, turning the middle louvers clockwise, reducing the level at the center of the water flow by 5 cm and thus creating a wave of raising the level at the bottom. A level increase in the middle section by 5 cm is held at the input of the average O of the adder 9 during the time it takes for the average relay 13 to reach for a deceleration. At the same time, at the output of the average comparison circuit, a mismatch signal of -5 cm appears, which is compensated at the average adder 9, since at its second input a signal of -5 cm arrives, inverted by the average inverter 15 into a signal of +5 cm, and at the output of the average adder a zero signal is generated, and at the average outlet the level is reduced by 5 cm. The error signal -5 cm from the average comparison circuit 8 is fed to the upper relay 12 of the test time

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signal, and the upper key 14, giving a signal of +5 cm to the input of the upper adder 9 (through the upper inverter 15), as a result, the level of the alignment of the upper outflow 4 falls to 95 cm. At the output of the upper comparison circuit 8, the error signal +5 appears see, which through the relay 16 of the time of running-in (from the gate 2 to the upper gate of the water supply) closes the key 17 and enters the gate 18 regulator 2. Gate 2 works off the error, eliminating the imbalance.

At the same time, since the specified levels have not yet been established in the upper, middle and lower sections, there is an imbalance of 4-5 cm in the lower section, which is compensated by the average alignment through the run-up time from average to lower levels. The imbalance in the average level of +5 cm is compensated for by the time of flight from the upper range,

5 and the imbalance in the latter - through the bolt 2.

Thus, the total time of lagging in the case of a uniform arrangement along the section of the outlets of water outlets is reduced by three times as compared with the time of diving from gate 2 to the lower outlet. For k water runs, the travel time is reduced by a factor of k.

Thus, the proposed device establishes the parity of all consumers, and the overall efficiency is achieved by eliminating redundancy, wasting time on delivering water to the consumer, thereby reducing the time for rebuilding the channel operation mode, since the flow rate is adjusted at any point. In this case, the standing wave propagates upstream, and the running wave goes down. An increase in the velocity of the traveling wave is facilitated by a decrease in the flow resistance of the channel, which makes it possible to reduce the risk of overflow during pickups, increasing to a maximum the flow rate of water in the channel section.

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Claims (2)

1. A water supply control device at the canal site, including a comparison circuit with a control unit and a level sensor connected to it. A discharge outlet on the channel section and a flow level regulator connected to it through an adder at a stabilization platform, characterized in that, in order to improve accuracy and reduce reserve volumes, the device is equipped with series-connected between the second output of the comparison circuit on the underlying section 2. The device according to claim.), That is, that the regulator of the flow level in. The stabilization solution is made in the form of blinds at the bottom of the channel. and the second input of the time adder relays installed with the possibility of changing the deceleration from the beginning of the section to the stabilization level angle, the outflow time relay. their inclination towards-direction “2 W / Compiled by G.Paraev Editor I.Shulla Tehred M. Morgental Proofreader A. Zimokosv Order 3458/31 Circulation 606 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 operation of the level mismatch signal, a key and an inverter, wherein the control input of the key is connected to the third output of the comparison circuit on the underlying section. 2. The device according to claim.), That is, that the regulator of the flow level in. The stabilization solution is made in the form of blinds at the bottom of the channel. adjustable with angle of flow. data with the ability to change their inclination towards-direction 1