JPH02222011A - Abnormality display device for liquid level controller - Google Patents

Abstract

PURPOSE:To decrease the capacity of a power unit by using an oscillation means which oscillates in a prescribed cycle to perform the display of abnormality of one of two tanks at the time of outputting from one of both sides, then the display of abnormality of the other tank at the time of outputting from the other side, respectively. CONSTITUTION:When the full water abnormality signals and the water reduction abnormality signals of one side tank 3 and the other side tank 5 are inputted from an abnormality detecting circuit 8, the corresponding contacts 12a - 12d are closed. As a result, a corresponding 1st TR 19 is turned on and at the same time the 2nd TR 22a and 22b are alternately turned on and off in a prescribed cycle in response to the working of an oscillation means 23. Thus the currents flow to the display devices 3a, 3b, 5a and 5b related to the TR 19, 22a and 22b respectively for execution of the display of abnormality. As a result, the current consumption is reduced down to the value equivalent to just one display device in a continuous energizing state despite the simultaneous input of abnormality signals of both tanks 3 and 5 since the currents flows alternately to the display devices 3a, 3b, 5a, 5b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an abnormality display device in a liquid level control device used in a water supply and drainage system in a building or factory.

[Conventional technology]

In general, water supply and drainage systems for buildings, factories, etc., as shown in Figure 1, are controlled by a valve 1 such as a pole tap or solenoid valve, and are connected to a water tank 3 on one side, which consists of a water receiving tank installed underground, via an external water supply pipe 2. A predetermined amount of water is stored, and the water from one tank 3 is pumped up by a pump 4 to the other tank 5, which is an elevated tank installed on the roof, and the water stored in the other tank 5 is used in buildings, factories, etc. This is the mechanism used.

A reference electrode 6a, a lower electrode 6b, and an upper electrode 6c are installed in the other side water tank 5, and these electrodes 6a, 6b,
6c is input to the pump control circuit 7, and the water level is detected based on the presence or absence of water resistance with the reference electrode 6a. This pump control circuit 7 operates the pump 4 when the water level becomes below the lower end of the lower electrode 6b, and stops the pump 4 when the water level becomes above the lower end of the upper electrode 6c. The operation of the pump 4 is controlled so that the

Further, in this other side water tank 5, a water reduction abnormality detection electrode 6d located lower than the lower electrode 6b and a water fullness abnormality detection electrode 6e located higher than the upper electrode 6c are installed, and these electrodes 6a, 6d, and 6e are connected to an abnormality detection circuit 8, and detect an abnormality in the water tank 5 on the other side when it is low or full depending on the presence or absence of water resistance with the reference electrode rod 6a.

Further, the one-way water tank 3 includes a reference electrode 9a, a full-water abnormality detection electrode 9b installed at a position above the water level at which a predetermined amount of water is stored under the control of the valve 1, and a water-filled abnormality detection electrode 9b that is controlled by the valve 1 and stores a predetermined amount of water. A water reduction abnormality detection electrode 9C is installed at a position lower than the water level, and these electrodes 9a, 9b
, 9c are connected to the abnormality detection circuit 8, and detect an abnormality in the water tank 3 on one side when it is low or full depending on the presence or absence of water resistance with the reference electrode 9a.

This one-way water reduction abnormality signal in the water tank 3 is transmitted to the abnormality detection circuit 8.
The signal is input to the pump control circuit 7, and based on this water reduction abnormality signal, the operation of the pump 4 is forcibly stopped to prevent idling.

In addition, this abnormality detection circuit 8 outputs a low water abnormality signal and a full water abnormality signal for each of the water tanks 3.5 on one side and the other side to an abnormality display circuit 10, and in this abnormality display circuit 10, each of the indicators 3a, 3b , 5a, 5b, and at the same time as displaying on each display 3a, 3b, 5a, 5b, the alarm 11 is actuated to notify the user of the abnormality signal all at once.

In addition, the display 3a corresponds to an abnormal display of the water tank 3 on one side being filled with water, and the display 3b corresponds to an abnormal display of water reduction in the water tank 3 on the other side.
The indicator 5a corresponds to an abnormal display of the water tank 5 on the other side being full, and the indicator 5b corresponds to an abnormal display of the water tank 5 on the other side being low.

[Problem to be solved by the invention]

Therefore, it is necessary to display the abnormality of water filling and water reduction of the water tanks 3.5 on one side and the other side individually so that the administrator can take immediate action, so as mentioned above, the display 3a , 3b, 5a, 5b are installed individually,
The power supply capacity for the abnormality display that supplies power to the indicators 3a, 3b, 5a, and 5b is for each indicator 3a, 3b, and 5a.
, 5b plus the power consumption, leading to an increase in the capacity of the power supply device.

In addition, since it is actually impossible for the same aquarium to have a full water abnormality and a low water abnormality, it is possible to do so if the power capacity of the above power supply device is about half, but due to erroneous detection or equipment failure, both can occur at the same time. There is also a possibility that the display circuit 10 may be turned on, and in this case, there is a problem in that a voltage drop is caused not only in the display circuit 10 but also in each circuit, and sufficient display cannot be performed despite the abnormal state.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to reduce current consumption and reduce the capacity of a power supply device that supplies power.

In addition, it is intended to provide an abnormality display that can deal with the simultaneous occurrence of a water-filled abnormality and a water-reduced abnormality due to erroneous detection, malfunction, or the like.

Further, the purpose is to make it easier for the administrator to check abnormal displays.

[Means to solve the problem]

The present invention provides for controlling the operation of a pump that is interposed between a water tank on one side and a water tank on the other side and transferring liquid from the water tank on the one side to the water tank on the other side so that the amount of liquid in the water tank on the other side becomes a predetermined amount; At a predetermined period, a liquid level control device detects an abnormal full water state and a low water state of one side water tank and the other side water tank, respectively, and displays a full water abnormality and a water low abnormality of one side water tank and the other side water tank, respectively. An oscillating means that oscillates is provided, and when the oscillation means outputs from one side, it displays an abnormality in which the water tank on one side is full or low, and when it outputs from the other side, it displays an abnormality when the water tank on the other side is full or low. It is.

Additionally, in response to the generation of either the full water abnormality signal or the low water abnormality signal, the prohibition means for stopping the display of an abnormality caused by the generation of the other of the full water abnormality signal or the low water abnormality signal on the same water tank side. It has been established.

Furthermore, the frequency of the oscillation means that oscillates at a predetermined period is set in the low frequency range.

[For production]

Therefore, according to the configuration of the present invention, an oscillation means that oscillates at a predetermined period is provided, and when the oscillation means outputs from one side, an abnormality response display for the water tank on one side is performed, and when the output from the other side occurs, the abnormality response for the water tank on the other side is displayed. Since the display is made, even if an abnormal state in the blade side water tank and an abnormal state in the other side water tank occur at the same time, the display will be displayed alternately in response to the operation of the oscillating means, and the water full and low water abnormalities in the same water tank will be displayed alternately. Since these do not occur at the same time during normal operation, the current consumption required for abnormality display is the maximum of each display, and the capacity of the power supply device that supplies power can be reduced.

In addition, we have provided a means for inhibiting the display of abnormalities caused by the generation of the other signal on the same aquarium side in response to the generation of one of the abnormal signals, so that it is possible to prevent abnormalities from filling up or decreasing due to false detection or malfunction. Regarding simultaneous occurrences, the display of abnormal conditions that occur later is prohibited, but the abnormal conditions that occurred before are displayed, so the current consumption required for abnormality display does not increase, and even if some abnormality An indication of something is something that can be done.

Furthermore, since the frequency of the oscillation means is set in a low frequency range, any abnormality display will be a blinking display, making the display state conspicuous and easy to confirm.

〔Example〕

Below, Figures 1 and 2 are drawings showing the present invention as an embodiment.
This will be explained based on the diagram. Furthermore, Figure 1 has already been mentioned above.
FIG. 2 will be explained in relation to FIG. 1.

The second part shows a specific circuit of a part of the abnormality display circuit 10 shown in FIG. A contact 12a provides a full water abnormality signal for the blade side water tank 3, and a contact 12b provides a low water abnormality signal for the blade side water tank 3.

The full water abnormality signal of the other side water tank 5 is transmitted as a contact 12c, and the water low abnormality signal of the other side water tank 5 is transmitted as an opening/closing signal of the contact 12d.

These contacts 12a, 12b, 12c, and 12d are connected to a voltage of 100 V or 200 V via a rectifying diode 13, a first resistor 14, a second resistor 15, and a smoothing capacitor 16, respectively. is connected to the high voltage AC type a17, and a voltage dividing resistor 1- is connected to the smoothing capacitor 16-. As a result, each contact point 12a, 12b, 12c, 1
When 2d is closed, a voltage is generated across the voltage dividing resistor 18-.

The voltage dividing resistors 18-- are connected to the first transistors 19--.
- is connected, and performs on/off operation in response to the voltage generated across the voltage dividing resistors 18...-.

A diode 20-, indicators 3a, 3b-, 3c, 3c and a limiting resistor 2t- are connected to the output of the first transistor 19-, and the same aquarium is connected to the output of the first transistor 19-. The circuit systems that operate based on the 3.5 water full abnormality signal and the water low abnormality signal are grouped together and connected to a pair of second transistors 22a and 22b, respectively. That is, to one second transistor 22a, a circuit system related to the contact 12a that responds to an abnormality in which the water tank 3 on one side is full and a circuit system related to the contact 12b that responds to an abnormality in water reduction in the water tank 3 on the one side are connected together. , the other second transistor 22b
A circuit system related to a contact 12c that responds to an abnormality in which the water tank 5 on the other side is full and a contact 12 that responds to an abnormality in water reduction in the water tank 5 on the other side are shown.
The circuit system related to d is connected together.

The second transistors 22a and 22b are an oscillating means 2 consisting of an astable multi-pipe rake that oscillates at a predetermined period.
The normal rotation output and the inversion output of No. 3 are connected to each other, and in response to the operation of the oscillation means 23, they are alternately turned on and off at a predetermined period. As a result, any one of the first transistors 19-. detects an abnormal state, that is, the contacts 12a, 12b
, 12c, 12d are turned on in response to the closing of the second transistors 22a, 22a, and the second transistors 22a, 22a are turned on and off, so that current is intermittently supplied to any of the indicators 3a, 3b, 3c, 3c. The abnormality is displayed. At this time, even if an abnormal display indicating that several water tanks 3 are full or low in water on one side and an abnormal display indicating that water tanks 5 on the other side are full or low in water occur at the same time, the circuit system that displays the abnormality in several water tanks 3 on the other hand may occur at the same time. , the circuit system that displays the abnormality of the other side water tank 5 is divided into each of the second transistors 22a, 22b, and since the transistors 21a, 21b are activated alternately, the indicators 3a, 3b, 3c are displayed at the same time. ,
No current flows through the two 3c.

Note that the second transistors 22a and 22b and the oscillation means 23
in connection with the second transistors 22a, 22b
Diodes 24 and 24 are connected from each other's outputs toward the output side of the oscillating means 23, respectively. This is the second
When one side of the second transistors 22a, 22b turns on, a minute voltage is generated at the other side output of the oscillation means 23 due to the charging current, and in response to this minute voltage, the other side of the second transistors 22a, 22b turns on. This prevents the switch from turning on.

This oscillation means 23 and indicators 3a, 3b, 3c, 3C
The circuit system that supplies current to the rectifier diode 2 from the power supply 17
5, a step-down resistor 26, a smoothing capacitor 27, and a constant voltage diode 28.

Furthermore, diodes 30 are connected to the outputs of the first transistors 19-- of different abnormality display systems of the same water tank from the connection points of the first resistors 14-- and resistors 15--.
... are connected, and when different abnormalities in the same water tank are detected simultaneously or with a delay, the output of the first transistor 19-, which was previously turned on, is smoothed by the subsequent abnormal signal through the diode 30-. The voltage rise of the capacitor 16- and the voltage dividing resistor 18- is suppressed, and the subsequent ON operation of the first transistor 19- on the abnormal signal side is prohibited. As a result, if a full water abnormality signal and a low water abnormality signal occur simultaneously in the same aquarium due to a malfunction or failure, the abnormal signal issued first is given priority, and the corresponding indicators 3a, 3b, Since only the display devices 3c and 3c are energized, current does not flow through the display devices 3a, 3b, 3c, and 3c at the same time.

Therefore, due to the connection of the diodes 30 and -,
Prohibition means 31.- for stopping the display of an abnormality caused by the generation of the other of the full water abnormality signal and the low water abnormality signal on the same tank side in response to the generation of either the full water abnormality signal or the low water abnormality signal. It consists of

Furthermore, in one embodiment of the present invention, the frequency of the oscillation means 23 that oscillates at a predetermined period is set to a low frequency region of about 5) (Z), and the display devices 3a, 3b, 3c, and 3c The display state of appears to be blinking.
Since any abnormality display is a blinking display, the display state is noticeable and easy to confirm.

Note that the low frequency range referred to in this application is a frequency at which an abnormal display can be confirmed as a blinking display.

Now, to explain the operation of this circuit, when the full water abnormality signal and the low water abnormality signal of one side and the other side water tank 3.5 are inputted from the abnormality detection circuit 8 shown in Fig. 1, the corresponding contacts 12a, 12b, 12c, 12d are closed, the first transistor 19- corresponding to the closing of the contacts 12a, 12b, 12c, 12d is turned on, and in response to the operation of the oscillating means 23, the second transistor 19- is turned on. transistor 22a of
, 22b alternately turn on and off at a predetermined period, and the first transistor 19 and the second transistor 2
2a, 22b related indicators 3a, 3b, 3c, 3
A current flows through c and an abnormality is displayed.At this time, even if the abnormality signals from one side and the other side water tank 3.5 are input at the same time,
The current flowing through the display devices 3a, 3b, 3c, and 3c alternates, and the current consumption is based on the display device 3a, 3b, and 3C13c.
The current required for one unit when continuously energized is sufficient. Furthermore, even if a full water abnormality signal and a low water abnormality signal occur simultaneously in the same aquarium due to a malfunction or failure, the display of the abnormality caused by the generation of the other signal is stopped by the inhibiting means 31--, so that the current consumption is reduced. There is no increase.

Furthermore, another different embodiment will be explained based on FIG. 3, which has the same reference numerals as the embodiment shown in FIG. 2 described above.

The difference from the above-mentioned embodiment is that the contacts 12a, 12b,
12c, 12d to the first transistor t! 11. −．
This configuration is related to signal transmission to contacts 12a, 1
2b, 12c, 12d are connected to the AC voltage a17 through a voltage dividing resistor 32-, and the voltage of this voltage dividing resistor 32- is inputted to the photocoupler 33-. Second resistor 14...-1I5-.
・Smoothing capacitor 16--1 voltage dividing resistor 18...
, transmits a signal to the first transistor 19-.

The meaning of using the photocouplers 33-- for the signal transmission system is to use the oscillating means 23 and the indicators 3a, 3b, 3c, 3c.
In the rectifying and smoothing circuit 29 that supplies power to the rectifying and smoothing circuit 29, the diode 25 is used as a full-wave rectifying element 34 to increase the amount of power supplied, and for this purpose, the input and output reference potentials of the rectifying and smoothing circuit 29 are separated.

In addition, the switch 35 provided in the rectifying and smoothing circuit 29 is 100mm
and 200 cm, and one uses a resistor 36 and the other uses a capacitor 37 as elements for lowering the voltage.

Although the above-mentioned embodiment has been explained using a specific circuit configuration, it is of course possible to achieve this using computer software.

〔Effect of the invention〕

According to the present invention, an oscillation means that oscillates at a predetermined period is provided,
When this oscillation means outputs from one side, an error response display for one side water tank is displayed, and when the other side outputs, an error response display for the other side water tank is displayed. Even if these occur at the same time, they are displayed alternately in response to the operation of the oscillating means.Also, since full-water abnormalities and low-water abnormalities in the same water tank do not occur at the same time during normal operation, the current consumption required for abnormality display is smaller than that of each display. The largest one will suffice;
This has the effect of reducing the capacity of the power supply device that supplies power.

In addition, we have provided a means for inhibiting the display of abnormalities caused by the generation of the other signal on the same aquarium side in response to the generation of one of the abnormal signals, so that it is possible to prevent abnormalities from filling up or decreasing due to false detection or malfunction. Regarding simultaneous occurrences, the display of abnormal conditions that occur later is prohibited, but the abnormal conditions that occurred before are displayed, so the current consumption required for abnormality display does not increase, and even if some abnormality Displaying something is effective.

Furthermore, since the frequency of the oscillation means is set in a low frequency range, any abnormality display will be a blinking display, which has the effect of making the display state noticeable and easy to confirm.

[Brief explanation of the drawing]

Figure 1 is a diagram of a water supply and drainage system as an embodiment of the liquid level control device, Figure 2 is a circuit diagram showing an abnormality in the water supply and drainage system of Figure 1, which shows an embodiment of the present invention, and Figure 3 is a diagram of an abnormality display in the water supply and drainage system of Figure 1, which shows an embodiment of the present invention. FIG. 2 is an abnormality display circuit diagram in the water supply and drainage system of FIG. 1 showing another different embodiment of the present invention. 3-11 One side water tank, 4-pump, 5-other side water tank, 7
- Pump control circuit, 8-abnormality detection circuit, 1o-・-
- Abnormality display circuit, 3a, 3b, 5a, 5b =-indicator, 17--AC power supply, 23--oscillation means, 31-inhibition means.

Claims (3)

[Claims] (1) A pump that is interposed between one side water tank and the other side water tank and transfers liquid from one side water tank to the other side water tank is operated and controlled so that the amount of liquid in the other side water tank becomes a predetermined amount; A liquid level control device that detects an abnormal full water state or a low water state in one side water tank and the other side water tank, respectively, and displays the full water abnormality or low water abnormality in one side water tank and the other side water tank, respectively, oscillates at a predetermined period. The oscillation means is provided with an oscillating means, and when the oscillating means outputs from one side, it displays an abnormality in the water tank on one side when the water tank is full or when the water level decreases, and when it outputs on the other side, when it outputs the liquid level on the other side, it displays when the abnormality when the water tank on the other side fills up or when the water tank decreases. Abnormality display device in control equipment. (2) In response to the occurrence of either the full water abnormality signal or the low water abnormality signal, a means for inhibiting the display of an abnormality caused by the generation of the other of the full water abnormality signal or the low water abnormality signal on the same tank side. 2. An abnormality display device in a liquid level control device according to claim 1. (3) An abnormality display device in a liquid level control device according to claim 1, wherein the frequency of the oscillation means that oscillates at a predetermined period is set in a low frequency range.