SU1281215A1 - Apparatus for controlling locking member of water outlets of irrigation system - Google Patents

Description

The invention relates to the irrigation of agricultural crops and can be used in automated irrigation systems.

The purpose of the invention is to increase the reliability of the device.

The drawing shows a block diagram of a control device for the shut-off organs of the outlets of the irrigation system.

The device contains a control unit 1 with a software device 2, a power supply unit 3 and a threshold device 4, a switching device 5. A control unit for connecting b-10 lines of communication with cells of a ring switch 11 with numbers from 1 to n (number the cells are not limited to the control circuit). Each cell, for example, I, contains a relay with winding P1, normally open contacts K1.1 and K 1.2, capacitor C1, diodes Vl.l, VL2 and control contacts K1.3, turning on and off the actuators 12 of the locking bodies. Line b is a line of self-hold, line 7 is a line of progress, line 8 is a line of initial launch, line 9 is general, and line, line 10 is feedback. The output winding is lowered, its power supply Jp is connected at one end to the common line of the ring commutator, and to the other via counter-connected diodes VI and V2 in the control unit and the switching contacts K1 and K2 are connected to the self-holding and advancement lines 7.

The device works as follows.

In the initial state, the circuit is de-energized, normally open contacts are open, normally closed contacts are closed.

The circuit is preparing to start up by turning on the power supply and closing the start button S1, and no relay of the switch cells can work. To activate the first relay P1, it is necessary to apply a pulse from the software device 2 by turning on the button S2, while the threshold device 4 is activated and triggers

The switching device 5, the switching contact K1, is in the right position, with a pulsing negative polarity applied to lines 7 and 8. Following the contact K1, with some delay, it switches to the left position and the contact K2, which supplies the supply voltage to the line b. Relay P1 is activated, contact K1.1 becomes self-blocking, contact K1.2 prepares the next relay P2 for switching on and at the same time contact K1.3 actuates the first locking member and supplies water to the first group of irrigation system outlets. In this position, the circuit may be before the next control pulse from the software device. Button S1 can be released, since it does not affect further work. When the next pulse is applied, the threshold device 4 switches to another stable state, switching device 5 switches contacts K1 and K2 to its original position, on lines 6 and 7 the polarity of the supply voltage will change to positive, the relay P2 will work, it will become self-holding by contact K2 .1, prepare for switching on the next relay of relay through contact K2.2 and turn on the next drive with contact K2.3. Thus, the switch relays sequentially operate from the first to the last and the cycle repeats. The switching device 5 provides the switching of the contacts K1 and K2 with a certain time delay (first K1, then K2), and the control device for the shut-off organs of the outlets of the irrigation system works without failures for a predetermined period of time.

In the proposed control device of the shut-off bodies of the irrigation system outlets, there are no circuits for adjusting and regulating the cells of the ring switch according to electrical parameters, as well as a low supply voltage in the communication lines, which increases the electrical performance of its service.

Claims (1)

DEVICE FOR MANAGING THE LOCKING BODIES OF THE IRRIGATION SYSTEM WATER OUTLETS, comprising a power supply unit, electric actuators of the locking elements, a control unit with a start button, a communication line, a switching unit for actuating the locking elements, each of which is designed as a ring switch cell of an even or odd order of service containing a relay with winding, the contacts of which are included in the control circuit of the electric drive of the shut-off element, while the conclusions of the relay windings are connected to the power supply, characterized in that, in order to increase e For reliability in operation, the control unit is additionally equipped with a threshold device, a software device and a switching device containing counter-parallel connected diodes and switching contacts, and each cell of the ring switch further comprises a capacitor shunting the relay winding, two diodes and normally open relay contacts, one of which is connected in series with the coil of its own relay, and the other in the relay circuit of the next cell of the ring switch, while the second output of the relay coil is the first the cells through the first diode are connected to the normally open relay contact of the last cell of the ring switch and the start button, and the ring switch is connected to the control unit for additional communication lines, and the switching device is connected to the power source through its switching contacts and counter-parallel connected diodes and through the first diode cells of the ring switch and its own normally open relay contact - to the relay coil, also the relay coil through the second diode of the ring switch cell and a normally open contact of the previous switch - to the switching device, the switching diode polarity odd and even order the service of the ring opposite switch cells. SU „„ 1281215