RU2056480C1 - Method for regulating head in water supply system - Google Patents

Abstract

FIELD: water supply. SUBSTANCE: method for regulating head in water supply system includes generation of metered data in response to slewing angle of head regulator gates. Control signal is obtained by summing signals of metered data. Measurement of pump plant capacity is carried out inversely proportional as to the level of received control signal. EFFECT: accurate regulation of water head. 1 dwg

Description

 The invention relates to water supply, and more particularly to water supply of an urban or industrial type through a water supply network.

A known method of automatically controlling the operation of a pumping station, including recording the set value of the liquid level in the tank to be filled, generating an analog signal, converting it to a numerical value of the level and correcting the current values of the tank filling level [1]
A disadvantage of the known ability is the frequency of control, determined by the timer, the lack of pressure correction in the highway according to the working conditions of consumers and the water supply network.

A known method of automatically controlling the pressure in the water supply network, comprising supplying a signal to change the performance of the pumping station at several determining points of the specified network [2]
The disadvantage of this method is that the pressure exceeds a predetermined value at points that are not currently dictating, which leads to increased water consumption and non-compliance with a given pressure on the consumer, which may violate, for example, the specified technology for cooling metal ingots (metallurgy).

 The disadvantage of this method is also the low reliability of the electrical parts of the system due to the serial connection of the contact group of contact pressure gauges.

 The method is illustrated in the drawing.

 A device for implementing an automatic control method comprises a system for automatically controlling the pressure of the pump station 1, one or more systems for automatically controlling the pressure of the consumer II, a correction system for the pressure setting of the consumer and the pump station III. The automatic control system of the pressure station contains a pump 1, an adjustable electric drive 2, a regulator 3, a comparing element 4, a pressure gauge 5.

 Automatic pressure control systems for consumer II, IIa.IIn consist of gates 6.6.6n, gate actuators 7.7a.7n, on-off controllers 8.8a.8n electrocontact pressure gauges 9.9a.9n, manual adjusters 10, 10a.10n limits pressure fluctuations directly to water consumers 11, 11a. 11n (for example, foundry machines), sensors 12, 12a.12n of the angle of rotation of the shutters 6.

 The correction system for the set point of the consumer head and pump station III contains an adder 13 and an integrator 14.

 Systems I, II, IIa.IIn, III operate on the water supply network 15.

 The method of automatic regulation of pressure in the water supply network is as follows. On the comparing element 4, the initial required pressure is set at the dictating point A of the water supply network 15, measured by a pressure gauge 5. The controller processes the difference between the set and measured values of the pressure and supplies a control signal to the adjustable electric drive 2 of pump 1.

 Each water consumer 11, 11a.11n has an automatic control system for a given pressure II, IIa.IIn. The set values of the minimum and maximum pressure at each consumer 11 are set by the consumer on the electrocontact manometers 9,9a.9n by means of manual adjusters of the pressure fluctuation limits 10, 10a.10n. Electrical signals come from pressure gauges 9, 9a.9n to on-off controllers 8.8a.8n, which act on the gate actuators of the regulators 7.7a.7n, which makes it possible to withstand the pressure on consumers 11, 11a.11n within the established limits.

 The gates 6, 6a.6n are equipped with angle sensors 12, 12a.12n, the signals from which are fed to the adder 13. Depending on the position of the gates of all the regulators, the adder 13 instructs the integrator 14 to increase, decrease, or leave the pressure set previously at the pump station unchanged.

 The claimed method of regulation allows you to withstand the pressure in the dictating point not lower than the minimum required and not higher than the maximum necessary pressure on any consumer, taking into account pressure losses in the water supply network 15 to each consumer.

At each moment of time, of all water consumers, one is selected for which the condition is satisfied:
H _max = Δ h _max + H _ass.i, where H _{max is the} largest pressure value;
Δ h _{max the} amount of pressure loss in the network;
N set _{i of the} set pressure value at the i-th consumer.

 This allows you to get additional savings in electricity and water during its transport and use; to improve the quality of water supply due to stricter compliance with a given pressure on the consumer; use electrocontact manometers installed on consumers instead of gate position sensors (compatibility with prototype); work on a given pressure at a dictating point for any number of shut-off position sensors; unlimited increase in the number of controlled consumers; connect and disconnect gate position sensors without disrupting the operation of the automatic control system of the pump station and without reconfiguring the adder.

Claims (1)

 METHOD OF REGULATING THE HEAD IN A WATER NETWORK NETWORK, including supplying a control signal to change the performance of the network and the pumping station according to the measurement information signals from several nodal points of the specified network, characterized in that the measurement information signals are formed from the angle of rotation of the gates of the pressure regulators installed in the nodal points the signal is obtained by summing the signals of the measuring information, and the change in the productivity of the pumping station is carried out in inverse proportion Flax obtained depending on the level of the control signal.

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