JP3328355B2 - Alternating automatic operation control system for electric pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for alternately controlling the automatic operation of an electric pump for draining a water tank with two pumps.

[0002]

2. Description of the Related Art With regard to draining work using an electric pump, a system in which two pumps are alternately switched to perform intermittent operation in order to extend the life of the used pump is widely used.

However, since the switching between the alternate operation mode and the operation stop mode is conventionally performed by the No. 2 pump stop lower limit water level detector, the No. 2 pump stop lower limit water level detector is used to stop the No. 1 pump. If the lower water level detector is installed at a lower level than the lower limit water level detector, the water level drops due to the operation of the No. 1 pump, and the No. 2 pump stops even after the No. 1 pump stops by the operation of the lower limit water level detector for stopping the No. 1 pump. The lower limit water level detector cannot be operated, and the No. 2 pump remains in the non-operation mode without being switched from the non-operation mode to the operation mode. Since the pump cannot be started, the first pump is started again, and the switching of the alternate operation does not function.

[0004] Therefore, the lower limit water level detector for stopping the No. 2 pump is arranged at a higher water level than the lower limit water level detector for stopping the No. 1 pump, and the lower limit water level for stopping the No. 2 pump is reduced due to the lowering of the water level accompanying the operation of the No. 1 pump. A configuration is adopted in which the first pump stop lower limit water level detector is activated after the water level detector is activated and the second pump is switched from the operation stop mode to the operation mode. However, in this configuration,
Since the mounting position of the lower limit water level detector for stopping the No. 2 pump is high, even if a high-performance pump that can discharge to the low water level is used, its function cannot be fully exhibited, and the No. 2 pump cannot be used at the high water level. There is a disadvantage that the operation must be terminated. Further, in the water level setting work of the first pump stop lower limit water level detector and the second pump stop lower limit water level detector, delicate adjustment is required, and much labor and time are consumed. Also, a conventional circuit as shown in FIG.
In the configuration, the water surface of the tank equipped with the electric pump was wavy
Then, the water level detection signal from the sensor turns ON in a short time.
The water level cannot be detected accurately by repeating the OFF operation.
At the point F output from the inverter circuit as shown in FIG.
Output signal is, for example, three pulses
In the event of an accident, the automatic alternating
Malfunction, which is a response
It will occur several times depending on the surface condition. And the above mistake
If a malfunction pulse occurs even number of times,
And the operation, OPERATION switching of No.1 pump and No.2 pump not
It is a function.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention that both the lower limit water level detector for stopping the No. 1 pump and the lower limit water level detector for stopping the No. 2 pump can be arranged at the lowest possible water level, and fine adjustment is made in setting the water level. Even if both detectors are installed at the same water level or provided with a height difference, the alternate operation of both pumps can be reliably performed , and a violent surge on the water surface is not required.
From the sensor in the condition where
Even if the water level detection signal repeatedly turns on and off in a short time
No malfunction, No.1 pump and No.2 pump by proper water level detection
An object of the present invention is to provide a control system capable of surely switching operation of a pump .

[0006]

In the alternate automatic operation control system for an electric pump according to the present invention, an electric pump No. 1 and a pump No. 2 are used, and a lower limit water level detector for stopping a pump No. 1 for controlling a minimum water level is provided. No. pump lower limit water level detector, No. 2 pump start upper limit water level detector to detect higher water level than both detectors, No. 1 pump start upper limit water level detector to detect higher water level than this detector, It has an abnormally high water level detector that detects a higher water level than the detector and an automatic alternating operation circuit .
And the detection signal from the upper limit water level detector for pump 2
Resistance and capacitor at the input of the automatic operation control circuit
Equipped with an integration circuit composed of a sensor and
Automatic operation that processes the water level detection signal from the upper water level detector
The control circuit has a resistance value smaller than the resistance of the input unit.
The circuit from the resistor and diode to the capacitor
The upper limit water level detector for pump No. 2 is installed.
The charge of the capacitor with N is caused by the resistance of the main circuit.
Two systems, one via a resistor and one via a resistor and diode in the attached circuit
Turn off the upper limit water level detector for pump No. 2
The discharge of charge from the capacitor accompanying the
The system is operated by only one system via a counter.
The alternate operation is controlled by switching between the operation mode and the operation stop mode of the pump.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments will be described below with reference to the drawings.

In FIG. 1, P1 is an electric-powered No. 1 pump, P2 is an electric-powered No. 2 pump, and these two pumps are both installed in a water tank, and the No. 1 pump P1 has a lower limit water level. A detector SL1 and an upper limit water level detector SH1 are provided, and the No. 2 pump P2 is provided with a lower limit water level detector SL2 and an upper limit water level detector SH2, as well as an abnormally high water level detector SHA. In the drawings of the embodiment, the lower limit water level detector SL2 for stopping the pump No. 2 is arranged at a higher position than the lower limit water level detector SL1 for stopping the pump No. 1, but both are arranged at the same level. Alternatively, the first pump stop lower limit water level detector SL1 may be provided at a higher position than the second pump stop lower limit water level detector SL2. An upper limit water level detector SH2 for starting the No. 2 pump is arranged at a position higher than both of these detectors SL1 and SL2, and the operation mode and the stop mode of the No. 2 pump P2 are switched by the detection signal of the detector SH2. An alternate operation is controlled, and an abnormally high water level detector SHa is arranged at a higher position than the detector SH2.

As shown in FIG. 2, an integrating circuit is constituted by the resistor R1 and the capacitor C at the input of the automatic operation control circuit for processing the water level detection signal from each of the detectors.
The automatic operation circuit that processes the water level detection signal from the upper limit water level detector SH2 for starting the pump No. 2 includes a resistor R1 of the input unit.
Through a resistor R2 and a diode DI having a smaller resistance value than
Therefore, a circuit leading to the capacitor C is also provided .

The No. 1 pump P1 is an electric pump having a conventionally well-known automatic control device. When the pump P1 alone rises between the start water level H1 and the stop water level L1 and reaches the start water level H1, the pump is started. The operation of stopping when the water in the water tank decreases and reaches the stop water level L1 is repeated. 2
The pump No. P2 operates between the start water level H2 and the stop water level L2. However, once drainage is performed, the stop state is maintained even if the water tank increases to the start water level H2 next time. I have.

The operation of the pump motor of the No. 2 pump P2 will be described in more detail. The lower limit water level detector SL2 for stopping the No. 2 pump and the upper limit water level detector SH2 for starting the No. 2 pump are constituted by contact b, and the abnormally increased water level is detected. When the water level in the water tank is lower than the stop water level L2 and the lower limit water level detector SL2, the upper limit water level detector SH2, and the abnormally high water level detector Sha are all in the OFF state, the breaker SHA has an a contact. When the power is turned on, the circuit control voltage has not reached the state where the circuit can operate, so that the relay b
Power is supplied to the pump motor via the contacts, and the pump motor starts operating. However, when the control voltage increases, an H-level voltage is applied to the reset terminal R of the D-type flip-flop 2 and an L-level voltage is applied to the set input terminal S of the D-type flip-flop 2.
The output terminal Q of the D-type flip-flop 2 goes high to turn on the transistor Tr. At this point, the circuit control voltage has reached a voltage at which the circuit can operate, but has not reached a voltage at which the relay can operate. When the control voltage rises further and reaches a voltage at which the relay can operate, the relay is turned on because the transistor Tr is turned on. Therefore, the pump motor that has been operating by being supplied with the voltage via the contact b of the relay stops.

When the water level in the water tank is higher than the stop water level L2 and lower than the start water level H2, only the lower water level detector SL2 is ON and the upper water level detector SH2 and the abnormally high water level detector Sha are OFF, the power is supplied by the breaker. Is turned on, power is supplied to the pump motor via the contact b of the relay because the circuit control voltage has not reached a state where the circuit can operate, and the pump motor starts operating. However, when the control voltage rises, a high-level voltage is applied to the reset input terminal R of the D-type flip-flop 2 and a low-level voltage is applied to the set input terminal S of the D-type flip-flop 2. The output terminal Q 'of the type flip-flop 2 goes high to turn on the transistor Tr. At this point, the circuit control voltage has reached a voltage at which the circuit can operate, but has not reached a voltage at which the relay can operate. When the control voltage rises and the relay reaches a state where the relay can operate, the relay is turned on because the transistor Tr is turned on. Therefore the relay b
The pump motor that has been operating by being supplied with power via the contact stops. When the time further elapses, the voltage applied to the reset input terminal R of the D-type flip-flop 2 via the resistor RL2 is changed because the charge of the capacitor CL is discharged via the resistors RL and RL1.
Shift from H level to L level.

When the water level in the water tank has reached the starting water level H2 and only the abnormally high water level detector Sha is OFF and the upper and lower water level detectors SH2 and SL2 are ON, the power is turned on by the breaker. And since the circuit control voltage has not reached the state where the circuit can operate, the relay b
Power is supplied to the pump motor via the contacts, and the pump motor starts operating. However, when the control voltage rises, an H level voltage is applied to the reset input terminal R of the D-type flip-flop 2, and the D-type flip-flop 2
Is applied to the set input terminal S, the output terminal Q 'of the D-type flip-flop 2 goes high to turn on the transistor Tr. At this point, the circuit control voltage has reached a state where the circuit can operate,
The voltage that can operate the relay has not been reached. Then, when the control voltage rises and a state in which the relay can operate is reached after a further period of time, the transistor Tr is turned on and the relay is turned on. Accordingly, the pump motor that has been operating by being supplied with power via the contact b of the relay stops. Since the electric charge of the capacitor CL is discharged through the resistors RL and RL1 even after a further time has elapsed,
When the voltage of the reset input terminal R of the D-type flip-flop 2 via the resistor RL2 shifts from the H level to the L level, the H-level voltage is still applied to the reset input terminal R of the D-type flip-flop 1. , D
Even if a clock signal is input to the clock input terminal CL of the type flip-flop 1, the D-type flip-flop 1
Does not change. Therefore, there is no change in the circuit state of the D-type flip-flop 2 and the relay is kept ON to keep the pump motor stopped. When the time further elapses, since the charge of the capacitor C1 is discharged through the resistor R4, the voltage at the point I shifts from the H level to the L level through the resistor R5, and the circuit state of the D-type flip-flop 1 is changed. Becomes ready to operate whenever a clock input is input to the clock input terminal CL of the D-type flip-flop 1. When the time further elapses, the capacitor C is charged from the resistor R0 via the resistor R2, the diode DI, and the resistor R1, so that the clock input terminal C of the D-type flip-flop 1 is charged.
The voltage applied to L is rising, and the clock signal input terminal CL of the D-type flip-flop 1
When the clock signal is input to the D-type flip-flop 1 after shifting from the level to the H-level, the output terminal Q of the D-type flip-flop 1 changes from the L level to the H level, and Q ′ changes from the H level to the L level. And change. Information that the output terminal Q of the D-type flip-flop 1 has changed from the L level to the H level is applied to the clock input terminal CL of the D-type flip-flop 2, and the output terminal Q 'of the D-type flip-flop 2 is changed from the H level to the L level. Since the level becomes the level and the transistor Tr is turned off, the relay is turned off. Therefore, the pump motor is supplied with electric power through the contact b of the relay and starts operating.

The inside of the water tank has reached the abnormally high water level Ha,
When the power is turned on by the breaker when the abnormally high water level detector Sha together with the low water level detector SL2 and the high water level detector SH2 is in the ON state, the circuit control voltage has not reached the state where the circuit can operate. Electric power is supplied through the contacts, and the pump motor starts operating. However, when the control voltage rises, a high-level voltage is applied to the reset input terminal R of the D-type flip-flop 2, and
The set input terminal S of the D-type flip-flop 2 is L
Since the voltage of the level is applied, the output terminal Q 'of the D-type flip-flop 2 goes to the H level to turn on the transistor Tr. At this point, the circuit control voltage has reached a voltage at which the circuit can operate, but has not reached a voltage at which the relay can operate. When the control voltage rises further and reaches a voltage at which the relay can operate, the relay is turned on because the transistor Tr is on. Accordingly, the pump motor that has been operating by being supplied with power via the contact b of the relay stops. At this time, since the H-level voltage is applied to the reset input terminal CL of the D-type flip-flop 2,
Output terminal Q 'maintains H level, and transistor Tr
Also keeps ON and keeps ON the relay. When the time further elapses, the electric charge of the capacitor CL is discharged through the resistances RL and RL1, so that the D
The voltage applied to the reset terminal R of the type flip-flop 2 changes from H level to L level. When the time further elapses, the circuit state of the D-type flip-flop 2 changes from the L level to the H-level because the voltage applied to the set input terminal S of the D-type flip-flop 2 is charged in the capacitor Ca via the resistor Ra. Level, and the output terminal Q 'of the D-type flip-flop 2 goes low to turn off the transistor Tr. Therefore, the relay is off
Then, the pump motor is operated by being supplied with electric power through the contact b of the relay.

Next, the mode of alternate operation of the first pump P1 and the second pump P2 will be described with reference to the embodiments shown in FIGS.

After the power is turned on, each circuit is in a steady state, and since there is no water in the water tank and all the water level detectors are off, water flows into the water tank and the lower limit water level detector SL2 is turned on. At this time, the electric charge charged in the capacitor CL is discharged through the resistors RL and RL1, so that the voltage applied to the reset input terminal R of the D-type flip-flop 2 through the resistor RL2 changes from H level to L level. At this time, since an L-level voltage is applied to the set terminal S of the D-type flip-flop 2, the D-type flip-flop 2 is set in a state where it can operate at any time when a clock signal is input to its clock signal input terminal CL. Become. When water further flows in and the inside of the water tank rises to the level of H2, the upper limit water level detector SH2 is turned on, and the electric charge is charged to the capacitor C via the resistor R1 via the resistor R1 and the resistor R2.
And the charge is charged via the diode DI, and the voltage which shifts from the L level to the H level via the resistor R3 is D.
It is applied to the clock input terminal CL of the type flip-flop 1. When a pulse is applied to the clock input terminal CL of the D-type flip-flop 1, the H-level signal of the output terminal Q 'of the D-type flip-flop 1 is already applied to the data input terminal D of the D-type flip-flop 1. Therefore, the output terminal Q of the D type flip-flop 1 shifts from the L level to the H level and outputs the same to the clock input terminal CL of the D type flip-flop 2. When one pulse of the clock signal is input to the clock input terminal of the D-type flip-flop 1, the output terminal Q of the D-type flip-flop 1 changes from the L level to the H level, and the output terminal Q 'of the D-type flip-flop 1 changes to the H level. To L level. When the next clock signal is applied to the clock input terminal CL of the D-type flip-flop 1, the output terminal Q of the D-type flip-flop 1 changes from the H level to the L level, and the output terminal Q 'of the D-type flip-flop 1 changes. Changes from the L level to the H level. That is, the output terminals Q and Q 'of the D-type flip-flop 1 can be inverted and held for one rising of the water level. When a clock signal is input to the clock input terminal CL of the D-type flip-flop 2 in response to the transition of the output terminal Q of the D-type flip-flop 1 from the L level to the H level, the output of the D-type flip-flop 2 The terminal Q 'shifts from the H level to the L level, turning off the transistor Tr and turning off the relay. Accordingly, the pump motor is supplied with electric power via the point D of the relay and starts operating.

When the inside of the water tank rises to the water level of H2, drainage is performed by activating the No. 2 pump P2. When the inside of the water tank falls to the water level of L2 due to the drainage, the lower limit water level detector SL2 is turned off. Therefore, the capacitor CL is charged with the electric charge through the resistor RL, the voltage changes from the L level to the H level, and the H level is applied to the reset terminal R of the D type flip-flop 2 through the resistor RL2. The output terminal Q 'of the loop 2 is L
From level to H level, the No. 2 pump P2 stops because the transistor Tr is turned on and the relay is turned on. At this time, since the output terminal Q of the D-type flip-flop 1 holds the H level and the output terminal Q 'of the D-type flip-flop 1 holds the L level, the upper limit water level detector SH2 detects the next rise of the water level. When the ON signal is input, the output terminal Q of the D-type flip-flop 1 shifts from H level to L level, and the output terminal Q 'of the D-type flip-flop 1 shifts from L level to H level. Therefore,
A voltage that shifts from the H level to the L level is applied to the clock input terminal CL of the D-type flip-flop 2.
When the voltage shifts from the L level to the H level at the clock input terminal CL, the D-type flip-flop 2 outputs the D-type flip-flop 2 when the L-level is applied to both the set terminal S and the reset terminal R. The H level information of the data input terminal D of the flip-flop 2 is output to the output terminal Q of the D type flip-flop 2 at the H level, and the L level information is output to the output terminal Q ′ of the D type flip-flop 2.
It is designed to output levels. Even if a voltage for shifting the output terminal Q of the D type flip-flop 1 from the H level to the L level is applied to the clock input terminal CL of the D type flip-flop 2, the D type flip-flop 2
Continues to hold data and the D-type flip-flop 2
Keeps the H level, the transistor Tr keeps ON and the relay keeps ON.
Therefore, no power is supplied to the pump motor via the contact b of the relay, and the second pump P2 remains stopped.

When the water level in the water tank further rises and reaches the H1 level while the No. 2 pump P2 is stopped, the upper limit water level detector SH1 operates to start the No. 1 pump P1. Drainage is performed by the operation of the first pump P1, and when the inside of the water tank falls to the water level L1, the lower limit water level detector SL1 is turned off and the first pump P1 stops. At this time, even if the lower limit water level detector SL2 is ON or OFF, the output terminals Q and Q 'of the D-type flip-flop 1 do not change, so that the circuit state of the D-type flip-flop 2 also changes. Without this, the transistor Tr is maintained in the ON state, the relay is also maintained in the ON state, and the pump motor is maintained in the stopped state.

As described above, the water in the water tank is drained by the intermittent operation of the No. 1 pump P1 and the No. 2 pump P2. As described above, the water is discharged from the No. 2 pump start upper limit water level detector SH2. In the automatic operation circuit for processing the water level detection signal of the input terminal, the capacitor C is connected to the capacitor C via the resistor R2 and the diode DI having a smaller resistance value than the resistor R1 at the input portion.
When the upper limit water level detector SH2 is turned on, the electric charge is charged to the capacitor C via the resistor RO and the resistor R1, and the electric charge is increased to 2 by the resistor R2 and the diode DI. When the system is rapidly charged and the upper limit water level detector SH2 is turned off, the electric charge is discharged from the capacitor C by one system including only the resistor R1. Therefore, as shown in FIG. 4, the upper limit water level detector SH2
, The waveform at point F inside the IC of the D-type flip-flop 1 produces only one pulse. That is, even if the upper limit water level detector SH2 of the float type is frequently moved up and down due to violent ripples in the water tank, only one pulse is reliably generated for one water level rise. Therefore, the operation switching between the first pump P1 and the second pump P2 can be surely performed by appropriate water level detection.

Regardless of the operation of the first pump P1 and the second pump P2, when the water inside the water tank rises abnormally and rises to the water level of Ha, the abnormally high water level detector Sha turns ON.
Then, the electric charge is charged to the capacitor Ca via the resistor Ra, the voltage rises from the L level to the H level, a level is applied to the set input terminal S of the D-type flip-flop 2, and the output of the D-type flip-flop 2 is output. The terminal Q 'changes from the H level to the L level, the transistor Tr is turned off and the pump motor starts operating as described above. Therefore, for example, if the inside of the water tank rises abnormally during the drainage by the first pump P1 and rises to the water level of Ha, the second pump P2
Is also activated and rapid drainage is performed by two pumps.
No. 2 pump P2 stops at the water level of L1 and then at the water level of L1
The signal pump P1 also stops. At the time of drainage by the second pump P2, the inside of the water tank abnormally increased, and when the water level rose to the water level of H1, the first pump P1 was also started to perform rapid drainage by two pumps, and the second water was discharged at the water level of L2. Pump P2 stops,
Next, at the water level of L1, the first pump P1 is also stopped. If one of the pumps breaks down, the other pump alone performs the intermittent operation within the range from the start water level to the stop water level.

When the power is turned on, the water tank already has an abnormally high water level H.
If a has been reached and rapid drainage is required, 1
Immediately after the automatic operation circuit operates normally by turning on the power to the pump motors of the No. 1 pump P1 and the No. 2 pump P2, until the motor starting current of the No. 1 pump P1 stops flowing, 2
The operation of the # 2 pump P2 is forcibly stopped, and the operation of the # 2 pump P2 is restarted when the motor starting current of the # 1 pump P1 stops flowing. As a result, the current value of the first pump P1 and the current value of the second pump P2 are as shown in FIG. 6, and the normal operation is performed without the breaker operating.

[0022]

According to the system of the present invention, both of the lower limit water level detector for stopping the No. 1 pump and the lower limit water level detector for stopping the No. 2 pump can be arranged at the lowest possible water level. No adjustment is required, and even if both detectors are installed at the same water level or provided with a height difference, the alternate operation of both pumps is reliably performed , and the
In situations where there is undulating or foaming,
The water level detection signal from the sensor repeatedly turns on and off in a short time.
No malfunction when returning, No.1 pump by proper water level detection
And operation switching of No. 2 pump
There is an advantage that ∎ You can.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a relationship between switching operation of a pump and a change in water level in a system of the present invention.

FIG. 2 is an electric circuit diagram of a No. 2 pump used in the system of the present invention.

FIG. 3 is a circuit diagram of an upper limit water level detector for starting a No. 2 pump used in a conventional system.

FIG. 4 is a time chart showing the relationship between the detection signal from the upper limit water level detector for starting pump 2 and the operation of the automatic alternating operation circuit according to the system of the present invention.

FIG. 5 is a time chart showing a relation between a detection signal from a No. 2 pump starting upper limit water level detector and an operation of an automatic alternating operation circuit by a conventional system.

FIG. 6 is a time chart showing changes in the current value of the No. 1 pump and the current value of the No. 2 pump when rapid drainage is performed by the system of the present invention.

FIG. 7 is a time chart showing changes in the current value of the No. 1 pump and the current value of the No. 2 pump when rapid drainage is performed by the conventional system.

[Description of Signs ] C Capacitor DI Diode P1 No. 1 pump P2 No. 2 pump R1 Resistance R2 of input unit Resistance SL1 No. 1 pump stop lower limit water level detector SL2 No. 2 pump stop lower limit water level detector SH1 No. 1 Upper limit water level detector for pump start SH2 Upper limit water level detector for pump No. 2 SHA Abnormally high water level detector

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F04D 15/00 F04B 49/06

Claims (1)

(57) [Claims] 1. A motorized No.1 pump (P1) and the No. 2 pump (P2) is used, No.1 pump stop limit level detector for regulating the minimum water level (SL1) and No. 2 pump stop limit Water level detector (SL2), upper limit water level detector (SH for starting pump No. 2) that detects higher water level than both of these detectors
2), No. 1 pump upper limit water level detector (SH1) for detecting a higher water level than the detector, an abnormally high water level detector (SHa) for detecting a higher water level than the detector, and an automatic alternating operation circuit Detecting the upper limit water level for starting the No. 2 pump
Operation control circuit that processes the detection signal from the heater (SH2)
Consists of a resistor (R1) and a capacitor (C) at the input of the road
Equipped with an integrated circuit that detects the upper limit water level for starting the No. 2 pump
Operation system that processes the water level detection signal from the heater (SH2)
The control circuit has a resistance value that is greater than the resistance (R1) of the input section.
Via a small resistor (R2) and a diode (DI)
The circuit leading to the capacitor (C) is also installed.
With the ON of the pump upper limit water level detector (SH2)
The charge of the capacitor (C) is performed by the resistance (R
1) Resistor (R2) and diode (D
I) The upper limit for starting the No. 2 pump
Capacitor (C) when the water level detector (SH2) turns off
Of the electric charge from the device via the resistor (R1) of the main circuit
And a water level detection signal of the upper limit water level detector (SH2) for starting the No. 2 pump,
An alternating automatic operation control system for an electric pump, wherein the alternate operation is controlled by switching between an operation mode and an operation stop mode of a second pump (P2).