SU926614A2 - Touch-free automatic regulator for reclamation systems - Google Patents

Description

(5) CONTACTLESS AUTORESTER FOR MELIORATIVE SYSTEMS

I

The invention relates to automatic regulation and can be used for automatic regulation of the water level using multi-position electrically controlled valves of multi-span hydraulic structures of land-reclamation systems.

According to the main auth. No. 368586 is known a contactless auto regulator for ameliorative systems, comprising a measuring unit, an electronic unit including a functional part and an output stage, and a stabilization unit 1.

When using this device on multi-span structures, starters of one of all the gates are connected to the output stage of the electronic unit. However, the overwhelming majority of the blocking structures on main and inter-farm canals have more than one gate, and at head hydrotechnical structures the number of gates may be more

ten In this case, the control range is limited, since the position of the uncontrolled gates is not taken into account. In addition, the manipulation of only one shutter of a multi-span structure leads to an asymmetrical release of water into the downstream, the formation of erratic currents causing erosion of the channel and the deposition of pumps.

The purpose of the invention is to expand the functionality of the device.

The goal is achieved by the fact that the contactless auto regulator for meliorative systems contains a reversible counter, elements AND and a controlled pulse generator, whose input is connected to the output of the electronic unit, and the output to the first inputs of elements AND, the second inputs of which are connected to the corresponding outputs of the output unit. electronic unit cascade, and outputs - with the corresponding inputs of the reversible counter. 39 The drawing shows a block diagram of the device. The device consists of a measuring unit 1, an electronic unit 2, including a functional part 3 and an output stage k, a stabilization unit 5, a controlled pulse generator 6, two I 7 elements, a reversing counter 8. The output of the measuring unit + unit 1 is connected to the input of the electronic unit 2. The stabilization unit 5 is connected by its input to the output stage A, and the outputs to the functional part 3 of the electronic unit 2. The output of the functional part 3 of the electronic unit 2 is also connected to the input of a controlled generator of 6 pulses. The output of the controlled generator 6 of pulses is connected to the first inputs of two elements I 7, to the second rods of which the reversing circuits of the output stage k are connected. The outputs of the elements And 7 are connected respectively to the circuits, -complications and subtraction of the reversible counter 8. Reversible counter 8 has the number of outputs {i.e. conversion factor), equal to the number of gates connected to the autoregulator. The outputs of the reversible counter 8 are connected in an appropriate way to the control circuits of the actuators of the electric drive of the valves in the block 9 of the starters. The circuits for selecting the direction of movement of the valves in the starter unit 9 are connected to the chains. Raising and Lowering the reversing output of one stage 4. The device operates as follows. The measuring unit 1 compares the signals coming from the level sensor and the setting device (not shown) and if there is an error exceeding the deadband, the measuring unit 1 outputs a signal to the electronic unit 2, the functional part 3 of which generates a control signal whose duration is proportional to the value of the error . From the output of the functional part 3, the control signal is fed to the reversible output stage for amplification and at the same time starts the controlled generator of 6 pulses. The period of the pulses produced by the controlled generator of 6 pulses is chosen equal to the duration of the control signal with a minimum mismatch value exceeding the dead band of the measuring unit 1. The pulses produced by the controlled generator 6 arrive at the first inputs of two elements And 7. Depending on the presence control signals Rise or Lower, pulses are either at the Addition input or at the input. Subtracting the reversing counter 8. When each next pulse is output, hydrochloric signal at the outputs of down counter 8 respectively shifted either towards uvegmcheni or towards reducing the sequence numbers output. The output signals of the reversible counter 8 are fed to the starter unit 9 and select the number of the actuator to be actuated, and the signals to the starter unit 9 from the reverse output stage k determine the direction of movement of the gates. Upon termination of the control signal, the stabilization unit 5 is started, which blocks the operation of the functional part 3 of the electronic unit 2 for a time that determines the duration of the adjustment pause. At this time, the output of the functional part 3 of the electronic unit. 2, the control signal is absent, the controlled pulse generator 5 stops its operation, the output signal of the reverse output stage C is also absent, the control circuits for actuators of the actuators of the valves in the actuators block 9 are turned off, movement of the valves stops, the reversing counter 8 stores information about the number of the last actuated shutters. At the end of the pause duration, the stabilization unit 5 unlocks the functional part 3 of the electronic unit 2 and, if there is still a signal at its input, the described adjustment cycle repeats. With a minimum mismatch value exceeding the dead zone of the measuring unit 1, during the time of the control signal emitted by the functional part 3 of the electronic unit 2, the controlled generator 6 of pulses has time to issue only one pulse, i.e. the control signal is supplied to only one of the gates. With a larger mismatch value, the control signal is evenly divided between several gates. At5, 9

than when the control signal is received. Raising the shutters is sequentially turned upwards, and when the control signal is received. Lowering the shutters is turned on lowering in the reverse order. Changing the sequence of switching on the gates can be done by changing the connection of the outputs of the reversible counter 8 with the starter block 9,

Thus, the expansion of the functionality of the device is ensured by the fact that the level control range on multi-span structures has a maximum value, since the position of all the gates can vary from fully open to fully closed state in automatic mode without human intervention. In addition, since the switch-on time of each shutter has a fixed, predetermined duration, the average position of the shutters relative to their initial state remains unchanged during operation, i.e. remains

R

u6

unchanged pre-selected, optimal for specific conditions, the mode of release of water into the downstream of the blocking structure.

Claims (1)

1. USSR author's certificate No. 368586, cl. G 05 B 11/01, 1973