CN215672833U - Pharmaceutical chemical industry factory building accident fan control circuit - Google Patents
Pharmaceutical chemical industry factory building accident fan control circuit Download PDFInfo
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- CN215672833U CN215672833U CN202121926807.XU CN202121926807U CN215672833U CN 215672833 U CN215672833 U CN 215672833U CN 202121926807 U CN202121926807 U CN 202121926807U CN 215672833 U CN215672833 U CN 215672833U
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Abstract
The utility model relates to a fan control circuit for accidents of a pharmaceutical and chemical factory building, which structurally comprises a main circuit, wherein the main circuit comprises a fan M1 and a fan M2, three-phase wires of the fan M1 and three-phase wires of the fan M2 are respectively connected with three-phase alternating current, a main contact of a contactor KM1 is connected to the three-phase wires of the fan M1, a main contact of a contactor KM2 is connected to the three-phase wires of the fan M2, the three-phase wires of the fan M1 are connected with a zero line through a first control circuit, the three-phase wires of the fan M2 are connected with the zero line through a second control circuit, and the first control circuit comprises a manual forced starting branch, a manual control branch and an automatic control branch which are connected in parallel. The utility model can realize the alternate use of the two fans, ensures the reliability and effectiveness of the standby fan in use, facilitates the daily overhaul and maintenance of the fans, prolongs the service life of the fans and meets the actual use requirements of engineering.
Description
Technical Field
The utility model relates to a fan control circuit, in particular to a fan control circuit for accidents of pharmaceutical and chemical factory buildings.
Background
When the accident ventilation system of the class-A production area of a pharmaceutical chemical plant is designed, in order to ensure the reliability of the ventilation system in case of an accident, 2 exhaust fans are usually arranged (1 working fan and 1 standby fan), and the standby fans are required to be automatically put into use when the working fans are in failure. The conventional practice at present adopts a control mode that 1 fan is designated as a standby fan, and the standby fan is automatically started when the working fan fails. However, since the standby fan in the mode is in the inactive state for a long time, the self condition of the fan and the integrity of the control circuit are not easy to master, and the effectiveness of the standby fan can not be ensured. And the existing ventilation system fan is inconvenient to overhaul and debug.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a fan control circuit for accidents of pharmaceutical and chemical plants, and aims to solve the problems that the condition of a fan and the integrity of the control circuit in the existing ventilation system are not easy to master, the effectiveness of the input of a standby fan cannot be ensured, and the existing ventilation system is inconvenient to overhaul and debug.
The utility model is realized by the following steps: the utility model provides a pharmaceutical chemical factory building accident fan control circuit, including the major loop, the major loop includes fan M1 and fan M2, three-phase line and fan M2 of fan M1 three-phase line are connected with three-phase alternating current respectively, be connected with the main contact of contactor KM1 on fan M1's the three-phase line, fan M2's three-phase line is connected with the main contact of contactor KM2, be connected through first control circuit between fan M1's three-phase line and the zero line, be connected through second control circuit between fan M2's three-phase line and the zero line, first control circuit includes parallelly connected manual compulsory start-up branch road, manual control branch road and automatic control branch road, manual control branch road includes stop button and the start button of establishing ties, automatic control branch road includes parallelly connected first branch road and second branch road, the second branch road includes the time relay normally open contact, be connected with the normally closed contact and the time relay's of the contactor of establishing ties 2 between the front end of time relay KT normally open contact and the zero line The coil, parallelly connected first branch road and second branch road are connected with parallelly connected first switch and second switch, first switch is PLC interlocking node, the make-and-break is controlled by change over switch SA in manual control branch road, first branch road and second branch road, and parallelly connected manual compulsory start branch road, manual control branch road and automatic control branch road are connected with contactor KM 1's coil, and it has the operation pilot lamp to connect in parallel on contactor KM 1's coil, the operation pilot lamp is controlled the make-and-break by contactor KM 1.
The second control loop and the first control loop have the same structure, the contactor KM1 in the first control loop is replaced by a contactor KM2, and meanwhile, the contactor KM2 in the first control loop is replaced by a contactor KM 1; the second control circuit and the first control circuit share one transfer switch SA.
A contactor KM1 normally open contact is connected in parallel with the starting button of the manual control branch.
And a coil of the intermediate relay KA is connected in parallel on the operation indicator lamp, and the intermediate relay KA normally-closed contact and the fault indicator lamp which are connected in series are connected between the manual forced starting branch, the manual control branch and the automatic control branch which are connected in parallel and the zero line.
The first control loop also comprises a fan electric valve control loop which comprises a transfer switch SA3 and an electric valve actuator which are connected in series, wherein a contact 2 of the electric valve actuator is directly connected with the transfer switch SA3, and a contact 3 of the electric valve actuator is connected with the transfer switch SA3 through a normally open contact of an intermediate relay KA.
The first control loop also includes an alarm loop including a transfer switch SA2 and an alarm switch BJ connected in series.
The first control loop further comprises a power supply indicating loop, and a power supply indicating signal lamp is arranged on the power supply indicating loop.
And a fuse is arranged on a phase line connected with the first control loop.
Normally closed contacts of the thermal relay are arranged between the manual forced starting branch, the manual control branch and the automatic control branch which are connected in parallel and the coil of the contactor KM 1.
And a thermal relay and a circuit breaker are respectively arranged on three-phase lines of the fan M1 and the fan M2.
The two exhaust fans used for controlling the class-A production area of the medical factory building can realize two control modes of manual operation and automatic operation, the manual operation and the automatic operation are selected through the change-over switch SA, the opening and closing of the first switch are controlled through the PLC in the automatic control mode, so that the alternating operation of the fan M1 and the fan M2 is controlled, the control loops of the fan M1 and the fan M2 form an interlocking state, and when the working fan breaks down, the standby fan is automatically put into use after the short time delay of the time relay KT. When the maintenance and debugging are needed, the state is changed into a manual state through the change-over switch SA, and the fan M1 and the fan M2 are independently controlled to start and stop through the start button and the stop button respectively. When the manual control and the automatic control are invalid or accidents occur to cause that personnel are inconvenient to enter the site and the running state of the fan cannot be confirmed, the fan is forcibly started through the manual forced starting loop.
The utility model can realize the alternate use of the two fans, ensures the reliability and effectiveness of the standby fan in use, facilitates the daily overhaul and maintenance of the fans, prolongs the service life of the fans and meets the actual use requirements of engineering.
Drawings
Fig. 1 is a circuit diagram of the main loop of the present invention.
Fig. 2 is a circuit diagram of a first control loop of the present invention.
Fig. 3 is a circuit diagram of a first control loop of the present invention.
FIG. 4 is an illustration of a circuit diagram of the present invention.
In the figure: 1. manually and forcibly starting the branch; 2. a manual control branch; 3. a first branch; 4. a second branch circuit; 5. a fan electric valve control loop; 6. an alarm loop; 7. the power source indicates the loop.
Detailed Description
As shown in fig. 1, the fan-driven fan comprises a main loop, wherein the main loop comprises a fan M1 and a fan M2, three-phase lines of the fan M1 and three-phase lines of the fan M2 are respectively connected with three-phase alternating current, a main contact of a contactor KM1 is connected to the three-phase lines of the fan M1, a main contact of a contactor KM2 is connected to the three-phase lines of the fan M2, the three-phase lines of the fan M1 are connected with a zero line through a first control loop, and the three-phase lines of the fan M2 are connected with the zero line through a second control loop.
And the fan M1 and the fan M2 are also connected with the ground wire through wires. Thermal relays (KH 1 and KH 2) and circuit breakers (QF 1 and QF 2) are respectively arranged on three-phase lines of the fan M1 and the fan M2.
As shown in fig. 2, one end of the first control circuit is connected with one phase line L31 of three phase lines of the fan M1, and the other end is connected with the neutral line N. The first control loop comprises a manual forced starting branch 1, a manual control branch 2 and an automatic control branch which are connected in parallel, and the manual forced starting branch 1, the manual control branch 2 and the automatic control branch which are connected in parallel are connected with a coil of the contactor KM1 and then connected to a zero line N. The coil of the contactor KM1 is used for controlling the opening and closing of the main contact of the contactor KM1, when the coil of the contactor KM1 is electrified, all normally open contacts of the contactor KM1 are closed, and the contactor KM1 at other positions in the circuit diagram is connected with the main contact.
The manual control branch 2 comprises a stop button SBS1 and a start button SBF1 which are connected in series, the automatic control branch comprises a first branch 3 and a second branch 4 which are connected in parallel, the second branch 4 comprises a time relay KT1 normally open contact, a normally closed contact of a contactor KM2 and a coil of a time relay KT1 which are connected in series are connected between the front end of the normally open contact of the time relay KT1 and a zero line N, the first branch 3 and the second branch 4 which are connected in parallel are connected with a first switch K11 and a second switch K14 which are connected in parallel, the first switch K11 is a PLC interlocking node, the second switch K14 is an alarm interlocking node, the manual control branch 2, the first branch 3 and the second branch 4 are controlled to be switched on and off by a transfer switch SA, an operation indicator lamp PGG1 is connected on the coil of the contactor KM1 in parallel, a contactor 1 normally open contact is connected on the line where the operation indicator lamp PGG1 is located, the operation indicator lamp PGG1 is controlled by a contactor KM1, when the coil of the contactor KM1 was energized, the normally open contact of the contactor KM1 on the line where the running indicator lamp PGG1 was located was closed, thereby energizing the running indicator lamp PGG 1.
The coil of the time relay KT1 is used for controlling the opening and closing of the main contact of the time relay KT 1.
And a normally open contact of a contactor KM1 is connected in parallel on a starting button of the manual control branch 2, and when a coil of the contactor KM1 is electrified, the normally open contact of the contactor KM1 is closed to realize self-locking and keep the communication of a loop.
A coil of an intermediate relay KA11 is connected in parallel with the operation indicator lamp PGG1, and a normally closed contact and a fault indicator lamp PGY1 of the intermediate relay KA11 which are connected in series are connected between the manual forced starting branch 1, the manual control branch 2 and the automatic control branch which are connected in parallel and a zero line.
When the automatic control state, if the fan M2 work by the beginning, when fan M2 broke down, the coil disconnection of KM2 leads to the normally closed contact that is connected with series contactor KM2 between the front end of time relay KT1 normally open contact and the zero line N to be closed, time relay KT 1's coil circular telegram, after the time delay of a certain time, time relay KT1 on the second branch 4 normally open contact is closed, thereby make fan M1 automatically come into operation.
When the coil of the contactor KM1 is electrified, the coil of the intermediate relay KA11 is electrified, the normally closed contact of the intermediate relay KA11 is opened, so that the fault indication signal lamp PGY1 is powered off to indicate that the fan M1 is normally put into operation, when the coil of the contactor KM1 is powered off, the coil of the intermediate relay KA11 is powered off, the normally closed contact of the intermediate relay KA11 is closed, and therefore the fault indication signal lamp PGY1 is electrified to indicate that the fan M1 is put into operation to have a fault.
The first control loop also comprises a fan electric valve control loop 5, the fan electric valve control loop 5 comprises a change-over switch SA3 and an electric valve actuator which are connected in series, a contact 2 of the electric valve actuator is directly connected with the change-over switch SA3, and a contact 3 of the electric valve actuator is connected with a change-over switch SA3 through an intermediate relay KA11 normally-open contact.
The first control loop also comprises an alarm loop 6, the alarm loop 6 comprises a change-over switch SA2 and an alarm switch BJ which are connected in series, and an intermediate relay KA14 is also connected in series on the alarm loop 6. When the alarm switch is closed, the KA14 coil is electrified, the KA14 normally open contact is closed, and the exhaust fan M1 is started in a linkage mode.
The first control loop further comprises a power indication loop 7, and a power indication signal lamp PGW1 is arranged on the power indication loop 7.
Fuse FU1 is provided on phase line L31 to which the first control loop is connected.
A thermal relay KH1 is arranged between the manual forced starting branch 1, the manual control branch 2 and the automatic control branch which are connected in parallel and the coil of the contactor KM 1.
As shown in fig. 3, the second control loop has the same structure as the first control loop, the contactor KM1 in the first control loop is replaced by the contactor KM2, and the contactor KM2 in the first control loop is replaced by the contactor KM1, so that the two control loops are interlocked, and the specific components have different numbers.
As shown in fig. 2, 3 and 4, the second control circuit and the first control circuit share one transfer switch SA. The switch SA has 16 contacts, and when the switch SA is rotated to different positions, different operation states are indicated.
In a first control loop, a contact 7 and a contact 8 of a transfer switch SA are correspondingly positioned on a manual control branch 2, a contact 1 and a contact 2 are correspondingly positioned on a first branch 3, a contact 13 and a contact 14 are correspondingly positioned on a second branch 4, and a contact 5 and a contact 6 are used for transmission of self-control return signals; in the second control loop, the contact 9 and the contact 10 of the transfer switch SA are correspondingly positioned on the manual control branch 2, the contact 11 and the contact 12 are correspondingly positioned on the first branch 3, the contact 3 and the contact 4 are correspondingly positioned on the second branch 4, and the contact 15 and the contact 16 are used for automatic control return signal transmission.
The two exhaust fans used for controlling the class-A production area of the medical factory building can realize two control modes of manual operation and automatic operation, the manual operation and the automatic operation are selected through the change-over switch SA, the opening and closing of the first switch are controlled through the PLC in the automatic control mode, so that the alternating operation of the fan M1 and the fan M2 is controlled, the control loops of the fan M1 and the fan M2 form an interlocking state, and when the working fan breaks down, the standby fan is automatically put into use after the short time delay of the time relay KT. When the maintenance and debugging are needed, the state is changed into a manual state through the change-over switch SA, and the fan M1 and the fan M2 are independently controlled to start and stop through the start button and the stop button respectively. When the manual control and the automatic control are invalid or accidents occur to cause that personnel are inconvenient to enter the site and the running state of the fan cannot be confirmed, the fan is forcibly started through the manual forced starting loop.
Claims (10)
1. The utility model provides a pharmaceutical chemical factory building accident fan control circuit, a serial communication port, including the major loop, the major loop includes fan M1 and fan M2, the three-phase line of fan M1 and fan M2 are connected with three-phase alternating current respectively, be connected with the main contact of contactor KM1 on fan M1's the three-phase line, fan M2's three-phase line is connected with the main contact of contactor KM2, be connected through first control circuit between fan M1's the three-phase line and the zero line, be connected through second control circuit between fan M2's the three-phase line and the zero line, first control circuit includes parallelly connected manual compulsory start branch way, manual control branch way and automatic control branch way, manual control branch way includes stop button and the start button of establishing ties, automatic control branch way includes parallelly connected first branch way and second branch way, the second branch way includes time relay KT normally open contact, be connected with the normally closed contact of contactor KM2 of establishing ties between the front end of time relay KT normally open contact and the zero line with normally closed contact with KM2 And time relay KT's coil, parallelly connected first branch road and second branch road are connected with parallelly connected first switch and second switch, first switch is PLC interlocking node, manual control branch road, first branch road and second branch road are by change over switch SA control break-make, and parallelly connected manual compulsory start branch road, manual control branch road and automatic control branch road are connected with contactor KM 1's coil, and it has the operation pilot lamp to connect in parallel on contactor KM 1's coil, the operation pilot lamp is by contactor KM1 control break-make.
2. The pharmaceutical chemical factory building accident fan control circuit of claim 1, wherein the second control loop and the first control loop are identical in structure, and the contactor KM1 in the first control loop is changed to contactor KM2, and the contactor KM2 in the first control loop is changed to contactor KM 1; the second control circuit and the first control circuit share one transfer switch SA.
3. The pharmaceutical chemical factory building accident blower control circuit according to claim 1, wherein a normally open contact of a contactor KM1 is connected in parallel to a start button of the manual control branch.
4. The blower control circuit for industrial and chemical plant accidents according to claim 1, wherein a coil of the intermediate relay KA is connected in parallel to the operation indicator lamp, and the intermediate relay KA normally-closed contact and the fault indicator lamp are connected in series between the manual forced start branch, the manual control branch and the automatic control branch which are connected in parallel and a zero line.
5. The pharmaceutical chemical factory building accident blower control circuit according to claim 4, wherein the first control circuit further comprises a blower electric valve control circuit, the blower electric valve control circuit comprises a transfer switch SA3 and an electric valve actuator connected in series, the contact 2 of the electric valve actuator is directly connected with the transfer switch SA3, and the contact 3 of the electric valve actuator is connected with the transfer switch SA3 through a normally open contact of an intermediate relay KA.
6. The pharmaceutical chemical factory building accident blower control circuit of claim 1, wherein the first control loop further comprises an alarm loop, and the alarm loop comprises a transfer switch SA2 and an alarm switch BJ connected in series.
7. The pharmaceutical chemical factory building accident blower control circuit of claim 1, wherein the first control loop further comprises a power indication loop, and a power indication signal lamp is arranged on the power indication loop.
8. The pharmaceutical chemical factory building accident blower control circuit of claim 1, wherein a fuse is arranged on a phase line connected with the first control loop.
9. The pharmaceutical chemical factory building accident fan control circuit according to claim 1, wherein normally closed contacts of a thermal relay are arranged between the manual forced start branch, the manual control branch and the automatic control branch which are connected in parallel and the coil of the contactor KM 1.
10. The pharmaceutical chemical factory building accident fan control circuit of claim 1, wherein a thermal relay and a circuit breaker are respectively arranged on three-phase lines of the fan M1 and the fan M2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121926807.XU CN215672833U (en) | 2021-08-17 | 2021-08-17 | Pharmaceutical chemical industry factory building accident fan control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121926807.XU CN215672833U (en) | 2021-08-17 | 2021-08-17 | Pharmaceutical chemical industry factory building accident fan control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215672833U true CN215672833U (en) | 2022-01-28 |
Family
ID=79953070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121926807.XU Active CN215672833U (en) | 2021-08-17 | 2021-08-17 | Pharmaceutical chemical industry factory building accident fan control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215672833U (en) |
-
2021
- 2021-08-17 CN CN202121926807.XU patent/CN215672833U/en active Active
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