JP4068894B2 - Aquarium equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to water tank apparatuses such as water tanks for receiving water and elevated water tanks, water tanks for middle water, drain tanks, and water tanks for sewage treatment facilities.
[0002]
More specifically, the present invention has a plurality of water tanks and a water level detector provided in each of these water tanks, and outputs a warning when a predetermined difference occurs in the water level signal from the water level detector of each water tank. The present invention relates to a water tank apparatus including a control device.
[0003]
[Prior art]
Conventionally, in a water tank apparatus such as a water receiving tank for water supply, for example, two water receiving tanks A tank and B tank are installed for the convenience of cleaning inside the water receiving tank. In many cases, the tank is cleaned so that water is not cut off during cleaning.
[0004]
In this case, the bottoms of tank A and tank B communicate with one header pipe, and are connected to the suction port of the pumping pump via this header pipe. In addition, the bottoms of these A and B tanks are connected to each other by a communication pipe, and each of the A and B tanks is provided with a water level detector for detecting the water level inside, and can be operated independently. It has become.
[0005]
In the case of normal operation, such a water tank apparatus is used in a state where the gate valve in the middle of the communication pipe is opened and the bottoms of the A tank and the B tank are communicated. Moreover, the water level detector provided in each water tank always uses only one as a main detector, and controls the water level in these water tanks.
[0006]
By the way, when the water in the water receiving tank is pumped to the elevated water tank by the above-mentioned pump, or when it is sent to the demand side at the end by a water pump or the like, the pump sucks water from the tank A and the tank B evenly. However, the amount of water from one of the water tanks is large, and the amount of water from the other water tank is often small. In particular, if the header pipe is not symmetrical with respect to the pump due to the space of the machine room where these water tanks are installed, The difference in water volume increases.
[0007]
Of course, since a gate valve is provided between the header pipe and each water tank, the opening degree of these gate valves is adjusted so that the amount of water from the tank A and the tank B is equalized. However, such adjustment work is not accurate, and the amount of water from both tanks may become non-uniform again after adjustment. Thus, when the difference in the amount of water from both tanks becomes large, the exchange rate of the water in the other tank with a small amount of water becomes low, water retention occurs, and the water quality may deteriorate due to a decrease in chlorine concentration.
[0008]
In addition, as the above water level detector, one that outputs a continuous water level signal corresponding to the water level by water head pressure, ultrasonic waves, etc. is used, and this water level signal is compared with the set value of the set water level by the control device. However, there are devices in the water supply system, such as those that control the water level in the water tank by opening and closing the water supply valve. Such a water level detector has features that the set value can be easily changed compared to the electrode rod type water level detector that has been widely used until now, and it is small and easy to install. On the other hand, there is a drawback that an error is likely to occur. Therefore, when a water level detector that outputs a continuous water level signal as described above is used, an error occurs between the water level detectors in tank A and tank B.
[0009]
As described above, the water level detectors are generally provided in both the A tank and the B tank, and the water level detector of one of the water tanks is normally used as the main detector. Thus, when cleaning, for example, when the water level detector in tank A, which has been used at all times, is switched to the water level detector in tank B, a large error may occur, and the control water level in the water tank (B tank). If this change is undesirably large and this change is large, the water level in the aquarium may be abnormally lowered, impeding water supply, or the water level may rise abnormally and overflow from the overflow pipe of the aquarium. is there.
[0010]
[Problems to be solved by the invention]
The present invention has been made based on the above circumstances, and in a water tank apparatus provided with a plurality of water tanks, when there is a difference in the amount of water flowing out from each water tank, the difference in water level based on the difference becomes a predetermined value. Control that outputs an alarm signal and can output an alarm even if the error between these detectors becomes large when a water level detector that outputs a continuous water level signal is used. The water tank apparatus provided with the apparatus is provided.
[0011]
[Means for Solving the Problems]
The present invention described in claim 1 includes a plurality of water tanks, a water supply system that supplies water into each of these water tanks, a drainage system that discharges water from each of these water tanks, and a communication passage that communicates the bottoms of these water tanks with each other. Provided with a water level detector that continuously detects the water level inside each water tank, and controls the water supply system of each water tank in response to a signal from these water level detectors. A control device that controls the amount of water in each of the water tanks to a predetermined water level, and the control device has a difference between a plurality of water level signals from the plurality of water level detectors. An alarm circuit for outputting an alarm signal when the alarm set value is exceeded is provided.
[0012]
Therefore, if there is a difference in the drainage flow rate from each tank, water flows from a tank with a low drainage flow rate to a tank with a high drainage flow rate via a communication pipe, but the water level in the tank with a large drainage flow rate is reduced due to the resistance of the communication pipe. Get higher. Therefore, when the difference between the water levels in these water tanks exceeds a predetermined alarm set value, an alarm signal is output, and adjustment or the like for eliminating the difference between the drainage flow rates can be performed based on this alarm. Therefore, when this water tank apparatus is applied to a water receiving tank, an elevated water tank, or the like, it is possible to prevent the water exchange rate in the water tank from being lowered and the water quality from being lowered.
[0013]
In addition, since this apparatus constantly monitors the difference between the water level signals from a plurality of water level detectors, an alarm is output when the error of the water level signal of a certain water level detector increases. Therefore, based on this warning, if adjustment work is performed so that no error occurs in the water level signals from these water level detectors, the water level will be changed when the water level detector used for cleaning the aquarium is switched. There is no large fluctuation, and it is possible to prevent an abnormal drop in the water level in the aquarium or overflow from the aquarium.
[0014]
The present invention according to claim 2 is characterized in that the alarm circuit is provided with a setting device capable of changing the alarm set value. Therefore, it is possible to easily change the alarm set value in accordance with the type and scale of the water tank apparatus, the operation conditions, etc., and to perform the optimum operation.
[0015]
The present invention described in claim 3 is characterized in that each of the water level detectors is provided with a calibration circuit for an output water level signal. Therefore, when this water tank apparatus is installed, it is possible to accurately calibrate so that the water level signals from the water level detectors are equal to each other using these calibration circuits, and the operation becomes more accurate and reliable. .
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the present invention is applied to a water receiving tank apparatus having two water tanks. FIG. 1 is a schematic configuration diagram of the water tank apparatus, and FIG.
[0017]
1a and 1b in the figure are two water receiving tanks, A tank and B tank, respectively. These A tank 1a and B tank 1b are installed, for example, in an underground machine room of a building. And these water supply tanks 2a and 2b are connected to each A tank and B tank, respectively. In the case of this embodiment, these water supply systems use clean water supplied through a water supply pipe as a water source, and each of the water supply systems 2a and 2b has a built-in solenoid valve type constant water level valve. 3a and 3b are provided, and these constant water level valves 3a and 3b are opened and closed by a control signal 25 from the control device 20 to be described later to control water supply into the A tank 1a and B tank 1b. The water level is maintained within a predetermined range.
[0018]
These constant water level valves 3a and 3b are connected to ball taps 4a and 4b that act as sub-valves, respectively, and in the event that a malfunction occurs in the built-in electromagnetic valve or control device 20 or the like. However, the ball taps 4a and 4b open and close in response to the rise and fall of the water surface, open and close the constant water level valves 3a and 3b, and can control the water levels in the A tank 1a and the B tank 1b. Has been.
[0019]
Further, a drainage system for discharging water from the water tank, for example, a header pipe 7 of a pumping pump 9 is connected to the bottoms of the A tank 1a and the B tank 1b. Connected to the inlet. And the water in each A tank 1a and B tank 1b is suck | inhaled by the pumping pump 9 via this header pipe | tube 7, and is sent to an elevated water tank (not shown). Gate valves 8a and 8b are provided between the header pipe 7 and the A tank 1a and B tank 1b, respectively. The bottoms of the tanks A 1a and B 1b are communicated with each other by a communication pipe 10, and a gate valve 11 is provided in the middle of the communication pipe 10, and the gate valve 11 is always in operation during normal operation. The valve has been opened.
[0020]
Further, each of the A tank 1a and the B tank 1b is provided with water level detectors 15a and 15b, respectively. In the case of this embodiment, these water level detectors 15a and 15b continuously detect the water level in these water tanks by water pressure, and the continuous water level A signal 16 and water level B signal 16b corresponding to the water level are obtained. Output. During normal operation, one of the water level detectors 15a and 15b, for example, the water level detector 15a of the A tank 1a is used as the main detector, and the A level 1a is detected by the water level detector 15a of the A tank 1a. And the water level of both water tanks of B tank 1b is controlled.
[0021]
Next, the configuration of the control device 20 will be described. The water level A signal 16a and the water level B signal 16b from the water level detectors 15a and 15b are analog signals of 4 to 20 mA, for example, and these signals are sent to the calibration circuits 21a and 21b, respectively. These calibration circuits 21a and 21b incorporate, for example, two volumes for zero adjustment and span adjustment, and zero adjustment of the water level signals from the water level detectors 15a and 15b, that is, adjustment of the position of the zero point, In addition, the span adjustment, that is, the proportional relationship between the water pressure and the output water level signal can be adjusted. Therefore, even when there is a difference in the characteristics of the water level detectors 15a and 15b, the water level signals from both the water level detectors 15a and 15b are all measured by adjusting these calibration circuits 21a and 21b first. It can be set equal over the range.
[0022]
The water level signals calibrated by these calibration circuits 21a and 21b are sent to the A / D converter 22, respectively. The A / D converter 22 is configured to individually convert the water level signals from the water level detectors 15a and 15b into digital signals.
[0023]
Then, the water level signals converted into digital signals by the A / D converter 22 are sent to the CPU 23 separately. The CPU 23 compares a plurality of preset water level set values with the water level signals sent from the water level detectors 15a and 15b, and when they match these water level set values, various control signals such as a water supply signal, for example. 25 is sent to the above-described constant water level valves 3a and 3b with built-in solenoid valves to control the opening and closing thereof, and the water levels of the A tank 1a and the B tank 1b are maintained at a predetermined water level.
[0024]
In addition to the above-mentioned valve opening / closing signal, the CPU 23 compares various set values with the water level signal, a full water warning (alarm when the water level of the aquarium has risen abnormally), and a low water alarm (water level is abnormally low). Alarm), idling alarm (alarm that the water level has dropped to the possibility that the pump is idling), return signal (signal that the water level has been restored until the pump can be restarted), and the like. The CPU 23 is configured to send a water level signal to the water level indicator 24 and to display the current water level numerically on the water level indicator 24.
[0025]
Next, a part of the alarm circuit that detects the difference between the water level signals provided in the control circuit 20 and outputs an alarm will be described. The water level signals from the water level detectors 15a and 15b are digitally converted by the A / D converter 22 and sent to the difference detection circuit 26, respectively. This difference detection circuit 26 detects the difference between the water levels, that is, the absolute value of the difference between the water level A signal 16a and the water level B signal 16b, and compares this difference with the alarm set value set by the setting device 27. When the difference is equal to or greater than the alarm set value, an alarm signal is sent to the CPU 23 described above. The setter 27 is configured to arbitrarily change the set alarm set value.
[0026]
In the CPU 23, when an alarm signal is sent from the difference detection circuit 26, an alarm indicating that a difference of a predetermined value or more has occurred in the water level signal, for example, an alarm lamp 28 blinks, and an alarm buzzer. 29 is activated. Further, the alarm relay 30 is activated and the contact thereof is closed so that it can be used for other purposes for remote monitoring.
[0027]
Next, the operation of such an embodiment will be described. First, when this water tank apparatus is installed or periodically, the water level detectors 15a and 15b of the A tank 1a and B tank 1b are calibrated using the calibration circuits 21a and 21b, and the water level signals from these are equal. Adjust so that
[0028]
In the case of normal operation, as described above, the gate valve 11 of the communication pipe 10 is opened to connect the bottoms of both water tanks, and one of the water level detectors 15a and 15b, for example, A The water level detector 15a of the tank 1a is used as a main detector, and the water levels of both the A tank 1a and the B tank 1b are controlled based on the water level signal from the water level detector 15a.
[0029]
In this case, the signal used for controlling the water level is the water level A signal 16a from the water level detector 15a. However, the difference detection circuit 26 includes the water level A signal 16a and the water level from both the water level detectors 15a and 15b. The B signal 16b is always input.
[0030]
Next, the operation of the difference detection circuit will be described with reference to the flowchart shown in FIG. That is, the water level A signal and the water level B signal are always input to the difference detection circuit 26 in steps ST1 and ST2. In step ST3, the absolute value of the difference between the water level A signal and the water level B signal is calculated. In step ST4, it is determined whether or not the difference between these water levels is equal to or greater than the alarm set value.
[0031]
If this difference is greater than or equal to the alarm set value, an alarm such as the above-mentioned alarm lamp blinking, alarm buzzer sounding, alarm relay operation, etc. is output in step ST5. Then, when the difference between the water level A and the water level B becomes equal to or less than the above alarm set value, the alarm lamp blinking stop, alarm buzzer sound stop, alarm relay operation stop, The alarm is stopped.
[0032]
And, for example, when a large amount of water is sucked from either tank A 1a or tank B 1b, for example, tank A 1a during operation of the pumping pump 9, and only a small amount of water is sucked from the other tank B tank 1b. The water level in tank A is lower. In this case, water flows from the B tank 1b to the A tank 1B through the communication pipe 10, but since this communication pipe 10 has resistance, there is always a difference in water level between the A tank 1a and the B tank 1b. This water level difference increases as the difference in the amount of water sucked from both tanks increases.
[0033]
When the water level difference between the A layer 1a and the B tank 1b is equal to or greater than a predetermined alarm set value, various alarms are output as described above. Therefore, since this warning reveals that a water level difference of a predetermined level or more has occurred in the water level between the tank A 1a and the tank B 1b, the opening of the gate valves 8a, 8b between the tanks and the header pipe 7, for example. Is adjusted so that water is evenly sucked from the A tank 1a and the B tank 1b. As a result, it is possible to prevent the water quality from deteriorating due to a decrease in the water exchange rate of the B tank 1b with a small amount of sucked water.
[0034]
Further, when an error occurs in the water level signals from the water level detectors 15a and 15b of the tank A 1a and the tank B 1b, an alarm is similarly output, so that the calibration circuits 21a and 21b are respectively adjusted. Thus, the outputs from both water level detectors 15a and 15b can be kept equal. Therefore, when the A tank 1a is cleaned, the water level does not greatly shift even when the gate valve 11 is closed and the water level detector 15b of the B tank 1b is switched to operate the B tank 1b alone.
[0035]
It is necessary to set the above alarm set values to different values depending on the type, scale, operation conditions, etc. of the water tank apparatus, but this alarm set value can be easily set by operating the variable setting device 27. Can be set or changed.
[0036]
Further, since the calibration circuits 21a and 21b are separately connected to the water level detectors 15a and 15b, respectively, the water level signals output from both the water level detectors 15a and 15b may be set equal to each other by adjusting them. This enables more accurate and reliable water level control.
[0037]
In addition, this invention is not limited to said embodiment, It can apply also to other water tank apparatuses, for example not only a water receiving tank but an elevated water tank, and other water tanks. Further, the number of water tanks is not limited to two, and it is needless to say that the present invention can be applied to a water tank apparatus including three or more water tanks. In addition, the present invention is not limited to water supply, but can also be applied to water tank apparatuses such as middle water (miscellaneous water), industrial water, waste water, and sewage treatment equipment. Further, the water level detector is not limited to the one that detects the water level by water pressure, and may be any device that can detect the water level continuously by ultrasonic waves, laser light, capacitance, float, or the like.
[0038]
Furthermore, in the above embodiment, the description has been given of the case where the two water tanks are communicated by the communication pipe. However, the communication portion is formed at the lower part of the partition wall that divides one water tank into a plurality of water tanks without using the communication pipe. In short, it is only necessary that the water tanks are communicated with each other through the communication path.
[0039]
In the above embodiment, the difference between the water level signals from each water level detector is calculated by the difference detection circuit and the warning signal is output. However, the present invention is not limited to this, and the water level signal from each water level detector. Any alarm signal can be output based on the difference between the two.
[0040]
【The invention's effect】
According to the first aspect of the present invention, a difference occurs in the drainage flow rate from each water tank, a difference occurs in the water level between the water tanks, and an alarm signal is output when the difference in water level between these water tanks exceeds a certain alarm set value. Therefore, it is possible to make an adjustment or the like to eliminate the difference between the drainage flow rates based on this alarm. Therefore, when this water tank apparatus is applied to a water receiving tank, an elevated water tank, or the like, it is possible to prevent the water exchange rate in the water tank from being lowered and the water quality from being lowered. Moreover, also in other water tank apparatus, the waste_water | drain flow volume from each water tank can be made uniform, and the undesired residence of water in each water tank can be prevented.
[0041]
In addition, since this apparatus constantly monitors the difference between the water level signals from a plurality of water level detectors, an alarm is output when the error of the water level signal of a certain water level detector increases. Therefore, based on this warning, if adjustment work is performed so that no error occurs in the water level signals from these water level detectors, when the water level detector used in the water tank cleaning work is switched There is no significant fluctuation in the water level, and it is possible to prevent an abnormal drop in the water level in the aquarium or overflow from the aquarium.
[0042]
Further, in the present invention according to claim 2, since the alarm circuit is provided with a setting device capable of changing the alarm setting value, it corresponds to the type and scale of the aquarium apparatus, operating conditions, etc. Thus, the alarm set value can be easily changed, and the optimum operation can be performed.
[0043]
Further, according to the third aspect of the present invention, each of the water level detectors is provided with a calibration circuit for an output water level signal. Therefore, when the water tank apparatus is installed, these calibrations are performed. The circuit can be used to accurately calibrate the water level signals from each water level detector to be equal to each other, making operation more accurate and reliable.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.
FIG. 2 is a flowchart for explaining the operation of an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1a A tank 1b B tank 2a, 2b Water supply system 7 Header pipe 9 Pumping pump 15a, 15b Water level detector 20 Controller 21a, 21b Calibration circuit 22 A / D converter 23 CPU
26 Difference detection circuit 27 Setting device 28 Alarm lamp 29 Alarm buzzer 30 Alarm relay

Claims (3)

Each of the above-mentioned water tanks, comprising a plurality of water tanks, a water supply system for supplying water into each of these water tanks, a drainage system for discharging water from each of these water tanks, and a communication passage that connects the bottoms of these water tanks to each other A water level detector that continuously detects the water level inside the water tank is provided, and the water supply system of each water tank is controlled in response to the signal from these water level detectors, and the water supply amount is controlled to control the water supply amount in each water tank. A control device that controls the water level to a predetermined water level is provided. This control device outputs an alarm signal when the difference between the plurality of water level signals from the plurality of water level detectors is equal to or greater than a predetermined alarm set value. An aquarium device characterized in that an alarm circuit is provided. The water tank apparatus according to claim 1, wherein the alarm circuit is provided with a setting device capable of changing the alarm set value. The water tank apparatus according to claim 1, wherein a calibration circuit for an output water level signal is connected to each of the water level detectors .

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