JPS6115972Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a control device for multi-purpose field irrigation equipment, and more specifically, the invention relates to a control device for multi-purpose field irrigation equipment, and more specifically,
The present invention relates to a field irrigation control device equipped with an alarm generating device having a built-in logic circuit for analyzing failures such as disconnection of a solenoid valve operation circuit.

Multi-purpose field irrigation equipment is equipment that uses pipes to mechanically and rationally irrigate wide fields. Usually, a central control base is installed in one irrigation area, and electromagnetic The fields are irrigated by installing valves and automatically controlling the opening and closing of the solenoid valves from a central control base so that each solenoid valve sequentially sprays a predetermined flow rate.

Generally, the irrigation area of one equipment is a wide area;
Additionally, because the terrain is rugged, visual control and monitoring is difficult, and the system must rely on instrument control.

Conventionally, the control device for this field irrigation equipment was
A solenoid valve drive device that is connected to an AC power source and generates a solenoid valve drive output, a rotation controller that corresponds to each solenoid valve, an indicator light that displays the operating position of the rotation controller, a flow rate transmitter, a flow rate indicator and an indicator. It consists of
Such conventional control devices are unable to detect disconnections in the solenoid valve operation circuit, and are unable to detect water leaks in the pipes, malfunction of the solenoid valves, blockages in the pipes, and manual overrides installed in the middle of the pipes. Even if an abnormal situation such as an erroneous operation of a control valve occurred, there was a risk that it would be overlooked.

The present invention improves the above-mentioned shortcomings of the field irrigation control device, and provides an alarm generating device that analyzes these failures and issues an alarm when failures such as water leakage, blockage, or disconnection of the solenoid valve operation circuit occur in the pipes. The object of the present invention is to provide a field irrigation control device equipped with the following features.

Embodiments of the present invention will be described below based on the drawings.
FIG. 1 is a block diagram showing a conventional field irrigation control device, and FIG. 2 is a block diagram of a control device according to the present invention.

In the figure, 1 indicates a piping path, and 2 to 9 indicate the configuration of parts related to the present invention of a conventional control device. A rotation controller 4 transmits the output of 3 to a large number of solenoid valves 7a, 7b, ... installed in the field.
The electromagnetic valves 7a, 7b, . . . are sequentially opened and closed. The rotation controller 4 is controlled by a set value of a flow rate setting device (not shown) determined for each solenoid valve and a signal from a flow rate transmitter 8. (This control system is not shown). The rotation controller 4 includes indicator lights 5a, 5b, . . . that indicate operating positions. The indicator lights 5a, 5b, ... are connected to the solenoid valve drive cable 6a,
It does not indicate whether or not the solenoid circuits of the solenoid valves 6b, . . . and the solenoid valves 7a, 7b, . . . are energized.

In the present invention, in such a field irrigation control device, a solenoid current indicator alarm meter 10 is inserted into the output side of the solenoid valve drive device 3, and an alarm generator 11 is also provided. Drive device 3 and solenoid current indicator alarm meter 1
0 and the flow rate indicator and alarm meter 9 of the flow rate transmitter 8 installed at the entrance of the pipe line 1.
and operation circuits 4, 6a, and solenoid valves 7a, 7b, ...
6b, . . . etc. has a built-in logic circuit to solve the problem.

The solenoid valve driving device 3 receives input from the AC power source 2 and generates power for driving the solenoid valves 7a, 7b, . . . , and houses operating switches and relays.

The solenoid current indicator alarm meter 10 is a solenoid valve 7
It indicates the current flowing through the solenoid coils a, 7b, etc. (usually about 170 mA DC) and has an alarm contact that is activated depending on whether the current is energized or not.

The flow rate indicator/alarm meter 9 indicates the signal from the flow rate transmitter 8 in analog or digital format, and is attached with an alarm setter that can adjust the upper and lower limits.

The alarm generating device 11 incorporates the logic circuit described above and generates an alarm externally, for example, by operating a buzzer 12.

The logic circuit of the present invention includes the alarm contacts of the flow indicator alarm meter 9 and the current indicator alarm meter 10, and the solenoid valve drive device 3.
By inputting and logically analyzing the contacts that indicate the operation of the system, the system determines the failure as follows, issues an alarm, and displays the failure.

(1) Water leakage...When there is no indication from the solenoid current indicator and alarm meter, but there is an indication from the flow rate indicator.(2) Pipe blockage or inability to open the solenoid valve...The flow rate indicator does not appear even though there is an indication from the solenoid current indicator and alarm meter. (3) Cable breakage or solenoid breakage...When the solenoid ammeter does not give an indication even though the solenoid valve drive device is operating. You can easily understand what happened. It can be a logic circuit, a relay circuit, or a non-contact circuit.

With the control device of the present invention, it is possible to easily detect malfunctions that could have been overlooked in conventional field irrigation control devices, prevent failure to achieve scheduled watering, save labor in irrigation work, shorten irrigation work, Eliminate wasteful labor and power costs, prevent irrigation water leakage, and use water effectively.
The overall reliability of the device has been improved and the device has become easier to handle.

Particularly in the work of spraying agricultural chemicals, the amount of spraying is small and accuracy is required, and there is a risk of serious trouble due to leakage, so the effect of accurate judgment using the device of the present invention is extremely significant.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional control device for field irrigation equipment, and FIG. 2 is a block diagram of a control device of the present invention, with control elements unrelated to the present invention being omitted in both figures. 1...Pipe line, 2...AC power source, 3...Solenoid valve drive device, 4...Rotation controller, 5a, 5b,...,
... Indicator light, 6a, 6b, ... Solenoid valve drive cable, 7a, 7b, ..., ... Solenoid valve, 8 ... Flow rate transmitter, 9 ... Flow rate indicator and alarm meter, 10... Solenoid current indicator and alarm meter , 11... Alarm generating device with built-in failure analysis logic circuit, 12... Alarm device.

Claims (1)

[Scope of utility model registration request] A solenoid valve is used in a field irrigation control system that performs rotational irrigation by sequentially energizing and closing the solenoid valve at the entrance of each watering pipe branched from the pipe line for each watering block by remote control from a control base. A solenoid current indicator and alarm meter was inserted into the output side of the drive device, and the respective operations of the solenoid valve drive device, the solenoid current indicator and alarm meter, and a flow rate indicator and alarm meter provided at the entrance of the piping path were detected. A field irrigation control device equipped with a failure analysis function, characterized in that it is equipped with an alarm generating device that has a built-in logic circuit for elucidating failures in the operating circuits of piping paths and the electromagnetic valves.