JPS6029153Y2 - Alternate operation relay device - Google Patents

Description

[Detailed explanation of the invention] This invention is an alternate operation in which two pumps are operated alternately each time a signal from a water level detection device installed in the aquarium is input to supply water to the aquarium, drain water, etc. The present invention relates to a relay device for use.

The conventional relay device for alternate operation, as shown in Fig. 1,
an external contact 4, first and second load power supply electromagnetic contactors 6, 7 which supply power to their own windings in response to the closing of the external contact 4, the external liquid, The first and second contacts 5c and 5d, which open and close in a complementary manner, are inserted and connected between the windings of the first and second load power supply electromagnetic contactors 6.7, respectively, and the external contact 4 is opened. and an alternate operation circuit section (2) in which the opening and closing states of the first and second contacts 5c and 5d are reversed each time the contact points 5c and 5d are opened and closed.

To explain in more detail, AC200V or ACIQQ
When an external contact 4 such as a floatless relay contact inserted in series between the AC power supply 1 of V and the power supply circuit part I is open, power is not supplied to the power supply circuit part I, and the two-winding latching relay 5 The contacts 5av5c maintain the open state, and the contacts 5b and 5d of the latching relay 5 maintain the closed state,
Therefore, no power is supplied to the windings of the electromagnetic contactors 6, 7, and the motors M1. a load power supply contact 6b for supplying power to M2;
7b are both open.

When the external contact 4 is closed, the external contact 4,
The excitation winding of the electromagnetic contactor 7 is energized through the contact 5d and the contact 59a of the thermal relay 59, and the load power supply contact 7b is closed within 5Qmsec after the external contact 4 is closed to supply power to the motor M2.

At the same time, the AC power supply 1 is converted into a DC voltage by the transformer 8, the bridge rectifier 9, and the capacitor 10, and this DC voltage passes through the diode 11, the contact 5b, and the reset winding R3 of the two-winding latching relay 5, and then the capacitor 12 is activated. While being charged, a current flows through the light emitting diode 62 through the diode 60 and the resistor 61, the light emitting diode 62 lights up, and waits for the two-winding latching relay 5 to switch.

In this case, the two-winding latching relay 5 does not change state.

Thereafter, when the external contact 4 is opened, the power supply to the excitation winding of the electromagnetic contactor 7 is stopped, and the load power supply contact 7b is opened, and the power supply to the motor M2 is stopped.

At the same time, the power supply to the power supply circuit section I is also stopped, a base current flows through the transistor 15 through the diode 13 and the resistor 14, the transistor 15 is turned on, and the charge in the capacitor 12 is transferred to the reset coil R3 of the two-winding latching relay 5 It is discharged through the diode 13 and the transistor 15, and this discharge current reverses the two-winding latching relay 5, so that the contacts 5a and 5c are in the closed state, and the contact 5 is in the closed state.
b and 5d become open and maintain this state, and the light emitting diode 62 turns off.

In this case, since the capacitor 16 is connected between the base and emitter of the transistor 15, when the external contact 4 is opened, the large capacity capacitor 12 is connected to the capacitor 16 first.
Current flows into the capacitor 16, charging the capacitor 16 to the polarity shown in the figure. When the charging voltage of the capacitor 16 exceeds the threshold, the transistor 15 is turned on for the first time, and the charge in the capacitor 12 is transferred to the reset coil R3 and the diode 13.
The capacitor 16 serves to delay the turning on of the transistor 15.

As a result, after the electric charge of the small capacity capacitor 10 is sufficiently discharged and the base potential of the transistor 15 is sufficiently lowered, the transistor 15 is connected from the capacitor 12 to the base Tt.
K is supplied, the transistor 15 is suddenly turned on, and the charge in the capacitor 12 is rapidly discharged, thereby ensuring the switching operation of the two-winding latching relay 5.

Note that if the capacitor 16 were not present, the base potential of the transistor 15 would remain high due to the residual charge in the capacitor 10 for a while after the external contact 4 is turned off.
Even if the external contact 4 turns off, the transistor 15 does not turn on suddenly, and the impedance gradually decreases. Therefore, the current flowing through the reset coil R3 of the two-winding latching relay 5 also decreases. , there is a problem that the switching operation of the two-winding latching relay 5 is uncertain.

When the external contact 4 is closed again, the external contact 4, the contact 5C, and the contact 63a of the thermal relay 63 are connected from the AC power supply 1.
The excitation winding of the electromagnetic contactor 6 is energized through the contact 6, and the load power supply contact 6b is closed within 5 Qmsec after the external contact 4 is closed, and power is supplied to the motor M.

At the same time, the AC power supply 1 is converted to a DC voltage by the transformer 8, the bridge rectifier 9, and the capacitor 10, and this DC voltage passes through the diode 11, the contact 5a, and the set winding S of the two-winding latching relay 5 to the capacitor 1.
7 is charged and the diode 64 and resistor 65
A current flows through the light emitting diode 66 to turn on the light emitting diode 66 and wait for the two-winding latching relay 5 to switch.

In this case, the two-winding latching relay 5 does not change state.

After that, when the external contact 4 is opened, the power supply to the winding of the electromagnetic contactor 6 is stopped, and the load power supply contact 6b is opened, and the power supply to the motor M is stopped.

At the same time, the power supply to the power supply circuit section I is also stopped, the base current flows through the transistor 15 through the diode 18 and the resistor 14, the transistor 15 is turned on, and the charge in the capacitor 12 is transferred to the set coil S1 diode of the two-winding latching relay 5. 18 and the transistor 15, and this discharge current reverses the two-winding latching relay 5, so that the contacts 5a and 5c are in the open state, and the contacts 5b and 5c are in the open state.
5d enters the closed state and maintains this state, and the light emitting diode 66 turns off.

In this case, since the capacitor 16 is connected between the base and emitter of the transistor 15, when the external contact 4 is opened, the large capacity capacitor 17 is first connected to the capacitor 16.
Current flows into the capacitor 16, charging it to the polarity shown in the figure, and when the charging voltage of the capacitor 16 exceeds the threshold, the transistor 15 turns on, and the charge in the capacitor 17 passes through the set coil S1 diode 18 and the transistor 15. As a result, the capacitor 16 serves to delay the turning on of the transistor 15.

As a result, the base current is supplied to the transistor 15 from the capacitor 17 after the electric charge of the small capacitor 10 is sufficiently discharged and the base potential of the transistor 15 is sufficiently lowered, and the transistor 15 is suddenly turned on. This causes the charge in the capacitor 17 to be rapidly discharged, thereby ensuring the switching operation of the two-winding latching relay 5.

Thereafter, the above-described operation is repeated in response to opening and closing of the external contact 4.

Also, when a signal such as an abnormal increase in water in a drain tank or an abnormal decrease in water in an elevated water tank is output from a floatless relay or the like and the abnormality detection contact 67 is closed, the winding of the relay (or timer) 68 is energized and the contact 68a is closed. Both windings of the magnetic contactors 6 and 7 are energized to simultaneously operate the motor Ml9M2, and the contact 6
8b maintains this state by itself.

As a result, the drainage capacity or water supply capacity is doubled compared to during alternate operation, and it is possible to prevent water from overflowing due to a rapid increase in water flowing into the drainage tank, for example.

The relay 68 is reset by turning off the switch SW.

However, in such a conventional alternating operation relay device, when an external signal (opening/closing of the external contact 4) is applied, the electromagnetic contactors 6 and 7 that should be activated may fail or the thermal relay 59, 63 may trip. etc., both motors M□9M2 would not operate, and reliability was not very high.

Therefore, if the manager learns of a malfunction with a warning lamp and does not repair it immediately, water will overflow from the drain tank or the water supply will stop supplying water. Failures cannot be detected until the worst-case scenario, such as a water outage, occurs, and the impact of failures is serious.

In addition, the relay 68 is configured to operate the motors M1 and M2 simultaneously in the event of an abnormality, but there are problems in that it requires space inside the pump control panel, assembly work, equipment, etc., and costs, and the wiring becomes complicated. was there.

Figure 2 shows another conventional relay device for alternate operation, with relay 6
8, a relay 69 having a contact 69a and a contact 70
At 70 b, the relay 70 is operated when the abnormality detection contact 67 is turned on, and the relay 70 is reset when the switch SW is turned off.The operation and problems are as shown in Fig. 1. It is similar to that.

Therefore, the purpose of this invention is to enable the electromagnetic contactor for load power supply to operate in its place when one electromagnetic contactor for power supply to load does not operate due to a failure etc. It is an object of the present invention to provide a relay device for alternate operation, which can be operated simultaneously without causing trouble due to the above, and without complicating internal wiring when incorporated into a control panel or the like.

An embodiment of this invention is shown in FIG.

That is, this relay device for alternate operation includes an external contact 4 and first and second load power supply electromagnetic contactors 6 and 7 that supply power to their own windings in response to the closing of the external contact 4. ,
First and second alternating operation contacts 5c and 5d that open and close complementary to each other are provided between the external contact 4 and the windings of the first and second load power supply electromagnetic contactors 6 and 7, respectively. an alternating operation circuit section (2) in which the opening and closing states of the first and second contacts 5c and 5d are reversed each time the external contact 4 is opened; an inverting circuit section (■) that detects non-operation of both the second load power supply electromagnetic contactors 6, 7 and supplies a signal corresponding to the thinning of the external contact (4) to the alternating operation circuit section (■); the abnormality detection contact 67, the connection point of the first alternate operation contact 5c and the winding of the first load power supply electromagnetic contactor 6, the second alternate operation contact 5d and the second
The contact 71a for simultaneous operation is connected between the connection point of the winding of the electromagnetic contactor 7 for load power supply, and the abnormality detection contact 67 is connected.
and a simultaneous operation circuit section (2) that closes the simultaneous operation contact 71a in response to the closing of the simultaneous operation circuit section (2).

The automatic reversing circuit section ■ consists of the power supply circuit section I and the alternating operation circuit section ■
When the external contact 4 is open as shown in the figure, the automatic reversing circuit section (2) does not operate.

When the external contact 4 is closed, normally closed contacts 6a, ? Either one of a is opened within about 5 Qmsec after the external contact 4 is closed, and the capacitor 20 is not charged, so the transistor 21' is off, the base current flows through the resistor 23 to the transistor 22, and the transistor 21' is turned off. 22 is turned on, power is supplied from the power supply circuit section I to the alternating operation circuit section (2), and the same operation as in FIG. 1 is performed.

Also, when the external contact 4 is closed, the thermal relay 59
Or, if one of the electromagnetic contactors 6 and 7 that should be activated does not operate due to a trip in 63 or a failure in the sequence circuit, both normally closed contacts 6a and 7a are closed and terminal 1
9A and 19B are short-circuited, the capacitor 20 is charged through the resistor 24, and this charging voltage is applied to the Zener diode 2.
When the Zener voltage of 5 is exceeded, the base current flows through the resistor 26 to the transistor 21, turning on the transistor 21, and therefore turning off the transistor 22, stopping power supply to the alternating operation circuit section (2).

As a result, the state of the two-winding latching relay 5 is reversed in the same way as when the external contact 4 is opened, the other of the electromagnetic contactors 6 and 7 is activated, and the terminals 19A and 19B are opened, and the capacitor 20 is discharged through resistor 27 and transistor 21 is turned off, thus transistor 2
2 is turned on and power is supplied again to the alternating operation circuit section (■).

Note that this device is normal when the external contact 4 is closed, and operates in the same way as described above even when it is stopped due to a thermal trip or the like while power is being supplied to one of the windings of the electromagnetic contactors 6 and 7. .

In addition, when a signal such as an abnormal increase in water level in a drain tank or an abnormal decrease in water level in an elevated water tank is output from a floatless relay or the like and the abnormality detection contact 67 is closed, power is supplied to the bridge rectifier 74 through the terminal 72 and resistor 73, and this DC output is applied to the bridge rectifier 74. A capacitor 76 is charged through 75, and this capacitor 76
When the voltage of the transistor 79 exceeds a certain value, the base Tl
current flows, the transistor 79 is turned on, and the capacitor 82 is charged from the power supply circuit section I through the diode 80 and the resistor 81. After a certain time delay, the winding of the relay 71 is energized, the contact 71a is closed, and the second winding is completed. Regardless of the wire latching relay 5, the windings of the electromagnetic contactors 6 and 7 are energized to reach the load power supply contact 6a.

7a are both closed, both motors M19M2 are operated, and this state is self-maintained by the contact 71b.

At the same time, the contact 71C of the relay 71 is closed, and the light emitting diode 62.66 is energized through the diode 83.84, so that the light emitting diode 62.66 is both lit.

After that, when the abnormality detection contact 67 is opened, the capacitor 7
6 is discharged through resistor 85 and transistor 79 is turned off, but relay 71 continues to hold itself until external contact 4 is opened.

Note that the other operations are similar to those shown in FIG.

As described above, the alternating operation relay device of this embodiment detects the inoperation of both the electromagnetic contactors 6 and 7 when the external contact 4 is opened, and reverses the state of the alternating operation circuit section (2). When one of the electromagnetic contactors 6 and 7 that should be activated does not operate, the other electromagnetic contactors 6 and 7 can be activated, so even in the event of a failure, water supply or drainage will continue, resulting in water outages, etc. No inconvenience will occur.

However, it is necessary to separately install a failure indicator to detect failures.

In addition, eight terminals 2A, 2B, 3A, 3B, 3C, 19
A, 19B, and 72 only need to be provided in the storage case of the device, allowing for miniaturization and a significant reduction in the space inside the panel.

Furthermore, since it can be accommodated in a conventional case for one timer, the appearance is improved when configured as a control panel.

Furthermore, since no separate parts such as a timer are required, a significant cost reduction can be achieved.

Another embodiment of this invention is shown in FIG.

That is, this relay device for alternate operation includes an external contact 4 and first and second load power supply electromagnetic contactors 6 and 7 that supply power to their own windings in response to the closing of the external contact 4. ,
First and second contacts 28a and 29a, which open and close in a complementary manner, are inserted and connected between the external contact 4 and the windings of the first and second load power supply electromagnetic contactors 6 and 7, respectively. and an alternating operation circuit section ■' in which the open/close states of the first and second contacts 28at29a are reversed each time the external contact 4 is opened, and the first and second electromagnetic contactors when the external contact 4 is opened. an inverting circuit section ■' that detects the inoperation of both 6 and 7 and supplies a signal corresponding to the opening of the external contact 4 to the alternating operation circuit section ■'; and an abnormality detection circuit that closes when an abnormality occurs. a contact 67; and a simultaneous operation circuit section ■' that simultaneously energizes the windings of both the first and second load power supply electromagnetic contactors 6 and 7 in response to the closing of the abnormality detection contact 67. There is.

To explain in more detail, AC200V or ACI Q
When the external contact 4 such as a floatless relay contact inserted in series between the AC power supply 1 of the QV and the power supply circuit section ■ is open, power is not supplied to the windings of the electromagnetic contactors 6 and 7; load power supply contact 6b.

7b are both open.

In addition, regardless of whether the external contact 4 is opened or closed, the AC power source 1 is converted to DC by the transformer 8, bridge rectifier 9, and capacitor 10 in the power supply circuit section (■), but when the external contact 4 is opened, the transistor in the inverting circuit section (■' 30 and 31 are respectively off, and either the Q output or the Q output of the D flip-flop 32 of the alternating operation circuit section ■', for example, the Q output is at a low level and the Q output is at a high level, and they are connected to the Nant gate. It is added to the base of the transistor 35.36 through 95.96, and the transistor 35.36 is turned on and off, respectively, and the relay 28 of the relays 28.29 is connected to the base of the transistor 35.36.
However, since the transistor 31 is off, both contacts 28a and 29a are open.

When the external contact 4 is closed, this external contact 4 and the resistor 3
7 to bridge rectifier 38, whose DC output charges capacitor 39 through resistor 40,
This capacitor 39! When the pressure exceeds a certain value, resistance 41
The base current flows into the transistor 30 through the transistor 30, the transistor 30 is turned on, and the base current flows into the transistor 31 through the resistor 42.
is turned on, and the relay 28 is energized from the power supply circuit section (■), the contact 28a is closed, and the winding of the electromagnetic contactor 6 is energized through the contact 63a of the thermal relay 63, and the load of the electromagnetic contactor 6 is The power supply contact 6b is closed and the motor M
Power is supplied to □.

At this time, the capacitor 43 is charged through the resistors 44 and 45, and the normally closed contact 6a of the electromagnetic contactor 6 is also opened.
Therefore, capacitor 46 is not charged and transistor 4
7 is in an off state, and this state continues until the external contact 4 opens.

Further, at the same time as the winding of the relay 28 is energized, the light emitting diode 88 is energized through the resistor 87, and the light emitting diode 88 is energized.
8 lights up.

Thereafter, when the external contact 4 is opened, the energization to the winding of the electromagnetic contactor 6 is stopped, the load power supply contact 6b is opened, and the normally closed contact 6a is closed.

Furthermore, the power supply to the bridge rectifier 38 is also stopped, the capacitor 39 is discharged through the resistor 48, and after a certain period of time, the transistor 30 is turned off, and therefore the transistor 31 is also turned off.

As a result, capacitor 43 is discharged through resistor 49, and the voltage drop of capacitor 43 is passed through inverter 50 and Schmitt circuit 51 to D flip-flop 32.
is added as a rising signal to the CP terminal of D.
The Q and Q outputs of the flip-flop 32 are inverted, allowing the winding of the relay 29 to be energized.

At this time, since transistor 31 is off, contact 2
Both 8a and 29a are opened, and the light emitting diode 88 is turned off.

When the external contact 4 closes again, the inverting circuit section ■' and the alternating operation circuit section ■' operate in the same manner as described above, and the relay 29 is energized by the power supply circuit section I, and the contact 29
a is closed and the winding of the electromagnetic contactor 7 is energized through the contact 59a of the thermal relay 59, and the load power supply contact 7b of the electromagnetic contactor 7 is closed and power is supplied to the motor M2.

In this case, the normally closed contact 6a of the electromagnetic contactor 6 opens instead of the normally closed contact 7a.

Further, at the same time as the winding of the relay 29 is energized, the light emitting diode 90 is energized through the resistor 89, and the light emitting diode 90 is energized.
0 lights up.

When the external contact 4 is opened again, energization to the winding of the electromagnetic contactor 7 is stopped and its load power supply contact 7b is opened, and a rising signal is applied to the CP terminal of the D flip-flop 32 in the same manner as described above. , the D flip-flop 32 is inverted and returns to its initial state.

Now, due to a malfunction or the like, one of the electromagnetic contactors 6 and 7 that should operate when the external contact 4 is closed does not operate, and the normally closed contact 6a
,? If both a maintain the closed state, the resistance 52
When the voltage of the capacitor 46 exceeds a certain value, base current flows into the transistor 47 through the inverter 53, 54 and the resistor 55, the transistor 47 is turned on, and the capacitor 46 is charged.
3 is discharged through the resistor 45, and a rising signal is applied to the CP terminal of the D flip-flop 32 in the same way as described above, inverting the Q and Q outputs of the D flip-flop 32 and inverting the other of the magnetic contactors 6 and 7. Activate.

As a result, either normally closed contact 6a or 7a opens, and capacitor 46 is discharged through resistor 56.

Furthermore, when the abnormality detection contact 67 is closed by a signal from a floatless relay or the like, power is supplied to the bridge rectifier 91 through the resistor 102, and this DC output causes the resistor 9
2, the capacitor 93 is charged, this rising voltage is applied to the PR terminal of the D flip-flop 94, and the Q output at this time is applied to the Nant gate 95.
Transistors 35 and 36 are turned on regardless of the Q and Q outputs of flip-flop 32, and both windings of relay 28 and 29 are energized at the same time, causing both motors M19M2 to operate at the same time, and both light emitting diodes 88 and 90 are lit. do.

After that, when the abnormality detection contact 67 is opened, the capacitor 93
is discharged through the resistor 97, but in the simultaneous operation state, the external contact 4 is opened and the inverter 98, capacitor 99 and resistors 100, 1 are connected to the CL terminal of the D flip-flop 94.
This continues until a signal from the circuit consisting of 01 is applied.

The effects of this embodiment are similar to those of the previous embodiment.

As described above, the alternate operation relay device of this invention includes an external contact, and first and second load power supply electromagnetic contactors that supply power to their own windings in response to the closing of the external contact. ,
First and second alternating operation contacts that open and close in a complementary manner are inserted and connected between the external contact and the windings of the first and second load power supply electromagnetic contactors, respectively, and the external contact an alternating operation circuit section in which the open/close states of the first and second alternating operation contacts are reversed each time the external contact is opened; an inversion circuit section that detects inoperation and reverses the opening and closing of the first and second alternating operation contacts of the alternating operation circuit section; an abnormality detection contact that closes when an abnormality occurs; and an abnormality detection contact that closes the abnormality detection contact. and a simultaneous operation circuit that simultaneously energizes the windings of the first and second load power supply magnetic contactors in response, so that if one of the load power supply magnetic contactors to be operated is activated due to a failure or the like. When the electromagnetic contactor fails, the other load power supply electromagnetic contactor can be operated instead, and there is no problem caused by failure of the electromagnetic contactor, resulting in high reliability.

In addition, since both load power supply electromagnetic contactors are energized simultaneously in response to the abnormality detection contact, it is possible to simultaneously operate the loads in the event of an abnormality to increase capacity.

Furthermore, since the simultaneous operation circuit section is built-in, there is no need to separately install and wire a relay component for simultaneous operation in the control panel when incorporating it into the control panel, simplifying the wiring inside the panel. .

[Brief explanation of drawings]

Fig. 1 is a circuit diagram of a conventional alternating operation relay device, Fig. 2 is a circuit diagram of another conventional alternating operation relay device, and Fig. 3 is a circuit diagram of an alternating operation relay device according to an embodiment of this invention. figure,
FIG. 4 is a circuit diagram of another embodiment of this invention. ■・・・Alternating operation circuit section, ■・・・Reversing circuit section, ■・・・Simultaneous operation circuit section, 4...
External contacts, 5c, 5d... Contacts, 6, 7...
...Magnetic contactor 71a...Contact.

Claims (1)

[Scope of utility model registration request] an external contact, first and second load power supply electromagnetic contactors that supply power to their own windings in response to closing of the external contact, and the external contact and the first and second load power supply magnetic contactors. First and second alternating operation contacts that open and close in a complementary manner are inserted and connected between the windings of the electromagnetic contactor, and each time the external contact is opened, the first and second alternating operation are performed. an alternating operation circuit section in which the open/close states of the external contacts are reversed; 1
and an inversion circuit unit that reverses the opening and closing of the second alternating operation contact, an abnormality detection contact that closes when an abnormality occurs, and the first and second load power supply electromagnetic circuits that respond to the closing of the abnormality detection contact. A relay device for alternate operation that includes a simultaneous operation circuit section that simultaneously energizes the windings of a contactor.