CN217976683U - Timing automatic switching control circuit for two fans - Google Patents
Timing automatic switching control circuit for two fans Download PDFInfo
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- CN217976683U CN217976683U CN202220758430.XU CN202220758430U CN217976683U CN 217976683 U CN217976683 U CN 217976683U CN 202220758430 U CN202220758430 U CN 202220758430U CN 217976683 U CN217976683 U CN 217976683U
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Abstract
The utility model discloses a two fan timing automatic switch-over control circuit, control circuit include miniature circuit breaker, insurance, select switch, auxiliary relay, time relay, pilot lamp, thermorelay and contactor. The control circuit provides short circuit and overload protection by a miniature circuit breaker and a fuse, the logic function of timing automatic switching is realized by utilizing the operation mode of a selector switch control circuit, an intermediate relay and a time relay, a contactor controls the start and stop of a fan, and an indicator lamp displays the operation state. The circuit is composed of common electrical components, does not relate to PLC, and is simple in structure and convenient to assemble and maintain. The utility model discloses, can realize offshore platform sewage treatment plant air-blower, ventilation blower between transformer, battery to and all "one is equipped with the timing automatic switch-over of one" fan, the fan is automatic regularly cut the energy conversion and is reduced operating personnel work load, saves the cost of labor.
Description
Technical Field
The utility model relates to a timing automatic switch-over's control circuit specifically is a two fan timing automatic switch-over's control circuit.
Background
At present, some equipment and rooms which are forced to ventilate by a fan, such as a domestic sewage device installed on an offshore platform, a storage battery room, a transformer room and the like, are generally provided with two ventilators, and one ventilator is used for standby. When the fan needs to be switched artificially or when a fault occurs, the phenomena that the insulation value of a fan motor which does not operate for a long time is zero, and a motor shaft and a motor end cover are blocked due to corrosion often occur.
Through groping and testing, the switching of the fans is often found, and the fault can be effectively prevented. Two ventilation blower automatic switch-over circuits, reduction operating personnel work load that can be fine can be more convenient, more punctual the switching work of completion fan.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a two fans are automatic switch-over control circuit regularly to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a timing automatic switching control circuit for two fans comprises: miniature circuit breakers, fuses, selector switches, intermediate relays, time relays, indicator lights, thermal relays and contactors. The control circuit provides short circuit and overload protection by a miniature circuit breaker and a fuse, the logic function of timing automatic switching is realized by utilizing the operation mode of a selector switch control circuit, an intermediate relay and a time relay, a contactor controls the start and stop of a fan, and an indicator lamp displays the operation state of the circuit.
As a further aspect of the present invention: and a signal remote transmission function is added, when the fan is in fault during operation, a fault signal is remotely transmitted to a duty room, and a duty worker can process the fault problem at the first time.
As a further aspect of the present invention: an alarm horn is added, and when the fan fails, sound alarm is generated.
As the utility model discloses further scheme again: and a time relay is added to accumulate the running time of the fan, and the fan is maintained in different degrees according to the running time of the fan.
As the utility model discloses further scheme again: and an intermediate relay is added, and when the running fan and the thermal relay act, the non-running fan is started immediately and runs continuously.
The beneficial effects of the utility model are that: the circuit is composed of common electrical components, does not relate to PLC, and is simple in structure and convenient to assemble and maintain. The utility model discloses, can realize offshore platform sewage treatment unit air-blower, ventilation blower between transformer, battery to and all one is equipped with a fan and regularly automatic switch-over. The fan automatically switches energy at regular time, so that the workload of operators is reduced, and the labor cost is saved; the fan is automatically switched to operate at regular time, so that the effects of removing moisture of the fan and reducing corrosion of a machine body can be achieved, and the fan is favorable for keeping a good operation state; when one fan breaks down, the non-failure fan can continuously run discontinuously, and the hydrogen aggregation between the electrolytic bath and the storage battery of the domestic sewage treatment device and the temperature rise in a ventilated room can be effectively prevented.
Drawings
Fig. 1 is an electrical schematic diagram of an embodiment of the present invention.
In the figure: 10-miniature circuit breaker, 11-control transformer, 12-safety A, 13-safety B, 14-fan A selection indicator light, SA 1-fan A/B selection switch, 15-fan A selection switch normally closed contact, 16-fan A selection relay, 17-fan B selection switch normally open contact, 18-fan B selection relay, 19-fan B selection indicator light, 20-fan A automatic operation relay normally open contact, 21-fan A operation indicator light, 22-fan A manual selection relay normally open contact, 23-fan A thermal relay normally closed contact, 24-fan A contactor, 25-manual operation indicator light, SA 2-fan manual/0/automatic selection switch, 26-manual selection switch normally open contact, 27-fan B manual selection relay normally open contact, 28-fan B thermal normally closed contact, 29-fan B operation contactor, 30-fan B automatic operation relay normally open contact, 31-fan B operation indicator light, 32-automatic selection switch normally open contact, 33-time normally open, 34-fan B automatic operation indicator light, 35-fan A manual selection relay, 36-time relay power-on delay opening contact, 37-fan A manual selection relay normally open contact, 38-fan A automatic operation relay, 39-fan B selection relay normally open contact, 40-fan B automatic operation relay, 41-time relay power-on delay closing contact, 42-fan B selection relay normally closed contact, 43-fan A thermal relay normally open contact, and, 44-fan A fault alarm indicator lamp, 45-fan B thermal relay normally open contact, 46-fan B fault alarm indicator lamp, 47-fan A motor molded case circuit breaker, 48-fan A motor contactor main contact, 49-fan A motor thermal relay, 50-fan A motor, 51-fan B motor molded case circuit breaker, 52-fan B motor contactor main contact, 53-fan B motor thermal relay, and 54-fan B motor.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Examples
Referring to fig. 1, in an embodiment of the present invention, a timing automatic switching control circuit for two fans includes a micro circuit breaker, a control transformer, a fuse, a selection switch, an intermediate relay, a time relay, an indicator light, a thermal relay, and a contactor; the system mainly comprises a fan selection control loop, a fan operation selection control loop and a fan overload alarm fault loop.
A control loop: the alternating current power supply passes through the 2P miniature circuit breaker-10 and then is connected to the upper port ends of the fuse A-12 and the fuse B-13 through the control transformer-11, and the control power supply supplies power to the control element after passing through the fuse A-12 and the fuse B-13; the left-side fuse A-12 is connected with a normally closed contact of a fan A selection switch, then is connected with a fan A selection relay-16 in series and returns to the lower port of the fuse B-13, and a fan A selection indicator lamp-14 is connected with two ends of the fan A selection relay in parallel; the fuse A-12, the fan B selection switch-17, the fan B selection relay-18 and the fuse B-13 are sequentially connected in series; the fan B selection indicator lamp-19 is connected in parallel with two ends of the fan B selection relay-18; returning to the lower port of a fuse B-13 through a lower port of a fuse A-12, a manual selection switch manual contact-26, a manual operation relay normal open contact-22 of a fan A, a thermal relay normal close contact-23 of the fan A and a fan A contactor-24, and connecting a fan A operation indicator lamp-21 to two ends of the fan A contactor-24 in parallel; the fan B runs the pilot lamp-31, connect in parallel to the fan B contactor-29 both ends through the lower port of insurance A-12, the manual switch manual contact-26 of the manual selector switch, fan B manual operation relay normally open contact-27, the fan B thermal relay normally closed contact-28, the fan B contactor-29, return to the lower port of insurance B-13, the fan B runs the lower port of the pilot lamp-31, connect in parallel to the fan B contactor-29; passing through the lower port of the fuse A-12, the automatic selection switch automatically selects the contact-32, is connected with the time relay-33 in series, returns to the lower port of the fuse B-13, and is connected with the automatic selection indicator lamp-34 in parallel to the two ends of the time relay-33; a time relay is electrified to delay and disconnect a contact-36, a series fan A manually selects a relay normally open contact-37, and after a series fan A automatically operates a relay-38, the series fan A is connected with an automatically selecting indicator lamp-34 in parallel; the fan B selects the normally open contact of the relay-39, after the fan B automatic operation relay-40 is connected in series, the fan B is connected in parallel with the manually selected relay normally open contact-37 of the fan A and the serially connected fan A automatic operation relay-38; the time relay is electrified and delayed to close a contact-41, and is connected in parallel with a time relay electrified delay disconnection contact-36 and a fan A manual selection relay normally-open contact-37 after being connected in series with the fan A manual selection relay normally-closed contact-35; an automatic selection switch automatically selects a contact-32, a series time relay is electrified to delay a closed contact-41, a series fan B selects a relay normally closed contact-42, and a series fan B automatically runs a relay-40; returning to the lower port of a fuse B-13 through a lower port of a fuse A-12, a normally open contact-43 of a thermal relay of a series fan A and a fault alarm indicator lamp-44 of the series fan A; and the fault alarm signal returns to the lower port of the fuse B-13 through the lower port of the fuse A-12, a normally open contact-45 of a thermal relay of the series fan B and a fault alarm indicator lamp-46 of the series fan B.
A main loop: the main power supply of the fan motor is connected with a fan A motor 50 through a fan A motor molded case circuit breaker 47, a fan A motor contactor main contact 48 and a fan A motor thermal relay 49; the system comprises a fan B motor molded case circuit breaker 51, a fan B motor contactor main contact 52, a fan B motor thermal relay 53 and a connecting fan B motor 54.
The utility model discloses control method does: closing the miniature circuit breaker 10, controlling the power supply to supply power to the control loop through a control transformer 11 and a safety A, B; and closing the fan A motor molded case circuit breaker 47 and the fan B motor molded case circuit breaker 51, and electrifying a main loop of the fan.
The manual control of the fan A: when the fan A/B selection switch SA1 selects the fan A, the fan selection switch contact 17 is disconnected, 15 is closed, the manual selection relay 16 of the fan A is electrified, the normally open contact 22 of the manual selection relay 16 of the fan A is closed, after the manual/0/automatic switch SA2 selects manual operation, the contact of the selection switch 26 is closed, a control power supply passes through the contact of the selection switch 26, the normally open contact 22 of the relay 16 and the normally closed contact 23 of the thermal relay of the fan A, so that the coil 24 of the fan A contactor is electrified to act, the main contact 48 of the motor contactor of the fan A is closed, the fan A runs, meanwhile, the fan A running indicator lamp 21 is electrified to display the running of the fan A, the manual running indicator lamp 25 is electrified to display the manual running; when the manual/0/automatic switch selects 0, the contact of the selection switch 26 is disconnected, the fan A contactor 24 loses power, the fan A motor contactor main contact 48 is disconnected, the fan A stops running, and the manual running indicator lamp 25 loses power and is turned off; when the fan A motor thermal relay 49 is overloaded, the normally closed contact 23 of the fan A motor thermal relay 49 is disconnected, the fan A contactor coil 24 loses power, the main contact 48 is disconnected, the fan A stops running, the normally open contact 43 of the fan A motor thermal relay 49 is closed, and the fan A fault indicator lamp 44 is electrified to give an alarm.
And (3) manually controlling a fan B: when the fan A/B selection switch SA1 selects the fan B, the fan B selection switch 15 acts to be disconnected, the contact 17 is closed, the fan B selection relay 18 is electrified, and the fan B manual operation relay normally-open contact 27 is closed; when the manual/0/automatic switch selects manual operation, the contact of the selection switch 26 is closed, the control power supply passes through the contact of the selection switch 26, the normally open contact 27 of the relay 18 and the normally closed contact 28 of the thermal relay of the fan A, so that the coil 29 of the contactor of the fan B is electrified to act, the main contact 52 of the contactor of the motor of the fan B is closed, the fan B operates, and meanwhile, the operation indicator lamp 31 of the fan B is electrified to display the operation of the fan B; when the manual/0/automatic switch selects 0, the contact of the selection switch 26 is disconnected, the coil 29 of the contactor of the fan B is de-energized, the main contact 52 of the contactor of the motor of the fan B is disconnected, and the fan B stops running. When the fan B motor thermal relay 53 is overloaded to act, the normally closed contact 28 of the fan B motor thermal relay 53 is disconnected, the fan B contactor coil 29 loses power, the main contact 52 is disconnected, the fan B stops running, the normally open contact 45 of the fan B motor thermal relay 53 is closed, and the fan B fault indicator lamp 46 is electrified to alarm.
The fan A is automatically controlled: when the fan A/B selection switch SA1 selects the fan A, the fan selection switch contact 17 is opened, the fan selection switch contact 15 is closed, the fan A manual selection relay coil 16 is electrified, and the fan A manual selection relay 16 normally-open contact 37 is closed; after the manual/0/automatic switch SA2 selects automatic, the manual selection switch contact 26 is disconnected, the automatic selection switch contact 32 is closed, the time relay 33 is powered to operate, the automatic selection indicator lamp 34 is powered to display automatic operation; when the time relay 33 does not reach the set time, the time relay is electrified, the time delay disconnection contact 36 is closed, the fan A manual selection relay 16 normally open contact 37 is closed, the fan A automatic operation relay 38 coil is electrified, the fan A automatic operation relay 38 normally open contact 20 is closed, the fan A contactor 24 coil is electrified to act, the fan A motor contactor main contact 48 is closed, and the fan A runs; meanwhile, the fan A operation indicator lamp 21 is powered on to display the operation of the fan A; the time relay 33 continues to be powered on to operate, when the first cycle time is reached, the time relay power-on delay disconnection contact 36 is disconnected, the fan A automatic operation relay coil 38 loses power, the fan A automatic operation relay 38 normally open contact 20 is disconnected, the fan A contactor coil 24 loses power to act, the fan A motor contactor main contact 48 is disconnected, and the fan A stops operating; meanwhile, a time relay power-on delay closing contact 41 is closed, a relay normally closed contact 42 is selected through a fan B, a fan B automatic operation relay coil 40 is electrified, a fan B automatic operation relay normally open contact 30 is closed, a fan B contactor coil 29 is electrified to act, a fan B motor contactor main contact 52 is closed, the fan B operates, a fan B operation indicator lamp 31 is electrified, and the operation of the fan B is displayed; the time relay 33 continues to be powered on to operate, when the second cycle time is reached, the time relay 33 acts, the power-on delay closing contact 41 of the time relay is disconnected, the automatic operation relay coil 40 of the fan B loses power, the normally open contact 30 of the automatic operation relay coil 40 of the fan B is disconnected, the power-off action of the fan A contactor 29 is carried out, the main contact 52 of the fan B motor contactor is disconnected, the fan B stops operating, meanwhile, the power-on delay opening contact 36 of the time relay 33 is closed, the normally open contact 37 of the relay 16 is manually selected through the fan A, the automatic operation relay coil 38 of the fan A is powered on, the normally open contact 20 of the automatic operation relay 38 of the fan A is closed, the power-on action of the fan A contactor 24 is carried out, the main contact 48 of the fan A motor contactor is closed, the fan A resumes operating, and the cycle is carried out; after the manual/0/automatic switch selects 0, the automatic selection switch contact 32 is disconnected, the automatic fan operation relay coils 38 and 40 lose power, the automatic fan operation relay contacts 20 and 30 are disconnected, the fan operation contactor coils 24 and 29 lose power, the main contacts 48 and 52 are disconnected, the running fan stops running, and the time relay 33 stops timing.
And (4) automatically controlling a fan B: when the fan selection switch selects the fan B, the fan selection switch selection 17 contact is closed, the fan B selection relay 18 is electrified, the fan B manual selection relay 18 normally open contact 39 is closed, and the fan B manual selection relay 18 normally closed contact 42 is opened; when the manual/0/automatic switch selects automatic, the time relay 33 is powered on to operate, the automatic selection indicator lamp 34 is powered on to display automatic operation; a coil of a manual selection relay 18 of the fan B is electrified, a normally open contact 39 is closed, a control power supply passes through 36 and 39, a coil 40 of an automatic operation relay of the fan B is electrified, a normally open contact 30 of the automatic operation relay 40 of the fan B is closed, a contactor 29 of the fan B is electrified to act, a main contact 52 of a contactor of a motor of the fan B is closed, the fan B operates, and the fan B operates in a first cycle period; the time relay 33 continues to be powered on to operate, when the second cycle period is reached, the time relay 33 acts, the time relay power-on delay disconnection contact 36 is disconnected, the coil 40 is powered off, the fan B stops operating, meanwhile, the time relay 33 power-on delay disconnection contact 41 is closed, the relay 16 normally closed contact 35 is manually selected through the fan A, the fan A automatic operation relay coil 38 is powered on, the fan A automatic operation relay 38 normally open contact 20 is closed, the fan A contactor 24 is powered on to act, the fan A motor contactor main contact 48 is closed, and the fan A starts to operate, so that the cycle is realized; after the manual/0/automatic switch selects 0, the automatic selection switch contact 32 is disconnected, the automatic fan operation relay coils 38 and 40 lose power, the automatic fan operation relay contacts 20 and 30 are disconnected, the fan operation contactor coils 24 and 29 lose power, the main contacts 48 and 52 are disconnected, the running fan stops running, and the time relay 33 stops timing.
When the manual/0/automatic switch is selected to be automatic, the fans A/B operate circularly, when 1 fan fails, the normally closed contact of the thermal relay of the motor of the failed fan is disconnected, the failed fan stops operating, the normally open contact is closed, the indicator light of the failed fan is electrified to alarm, and the non-failed fan continues operating in the own circulation period.
Claims (1)
1. The utility model provides a two fans timing automatic switch-over control circuit which characterized in that: the main power supply of the fan motor in the main loop is connected with a fan A motor (50) through a fan A motor molded case circuit breaker (47), a fan A motor contactor main contact (48) and a fan A motor thermal relay (49); a blower B motor molded case circuit breaker (51), a blower B motor contactor main contact (52), a blower B motor thermal relay (53) and a connection blower B motor (54);
an alternating current power supply in the control loop is connected to the upper port ends of a fuse A (12) and a fuse B (13) through a control transformer (11) after passing through a 2P miniature circuit breaker (10), and the control power supply supplies power to the control components after passing through the fuse A (12) and the fuse B (13); the left side fuse A (12) is connected with a normally closed contact of a fan A selection switch, then is connected with a fan A selection relay (16) in series and returns to the lower port of the fuse B (13), and a fan A selection indicator lamp (14) is connected with two ends of the fan A selection relay in parallel; the fuse A (12), the fan B selection switch (17), the fan B selection relay (18) and the fuse B (13) are sequentially connected in series; the fan B selection indicator lamp (19) is connected in parallel with two ends of the fan B selection relay (18); through the lower opening of the fuse A (12), a manual selection switch manual contact (26), a fan A manual operation relay normally open contact (22), a fan A thermal relay normally closed contact (23), a fan A contactor (24) and the lower opening of the return fuse B (13), a fan A operation indicator lamp (21) is connected to the two ends of the fan A contactor (24) in parallel; the fan B automatic operation relay normally open contact (20) is connected to the lower port of the fan A manual operation relay normally open contact (22) through the fuse A (12) and the fan B manual operation relay normally open contact (27) in parallel, the fan B thermal relay normally closed contact (28) and the fan B contactor (29) return to the lower port of the fuse B (13), and the fan B operation indicator lamp (31) is connected to the two ends of the fan B contactor (29) in parallel; through the lower opening of the fuse A (12), an automatic selection switch automatically selects a contact (32), is connected with a time relay (33) in series, returns to the lower opening of the fuse B (13), and is connected with an automatic selection indicator lamp (34) in parallel to two ends of the time relay (33); a time relay is electrified to delay a disconnection contact (36), a series fan A manually selects a relay normally open contact (37), and after being connected with an automatic operation relay (38) of the series fan A, the time relay is connected with an automatic selection indicator lamp (34) in parallel; the fan B selects a normally open contact (39) of the relay, and after the fan B automatic operation relay (40) is connected in series, the fan B is connected in parallel with the fan A manual selection relay normally open contact (37) and the series fan A automatic operation relay (38); a time relay power-on delay closed contact (41) is connected in series with a fan A manual selection relay normally closed contact (35) and then is connected in parallel with a time relay power-on delay open contact (36) and a fan A manual selection relay normally open contact (37); an automatic selection switch automatic selection contact (32), a series time relay power-on delay closing contact (41), a series fan B selection relay normally closed contact (42) and a series fan B automatic operation relay (40); the fault alarm signal returns to the lower port of the fuse B (13) through the lower port of the fuse A (12), a normally open contact (43) of a thermal relay of the series fan A and a fault alarm indicator lamp (44) of the series fan A; through the lower opening of the fuse A (12), a normally open contact (45) of a thermal relay of the series fan B and a fault alarm indicator lamp (46) of the series fan B return to the lower opening of the fuse B (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220758430.XU CN217976683U (en) | 2022-04-03 | 2022-04-03 | Timing automatic switching control circuit for two fans |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220758430.XU CN217976683U (en) | 2022-04-03 | 2022-04-03 | Timing automatic switching control circuit for two fans |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217976683U true CN217976683U (en) | 2022-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220758430.XU Active CN217976683U (en) | 2022-04-03 | 2022-04-03 | Timing automatic switching control circuit for two fans |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217976683U (en) |
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2022
- 2022-04-03 CN CN202220758430.XU patent/CN217976683U/en active Active
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