CN209028469U - Anti-flooding workshop control system based on PLC - Google Patents
Anti-flooding workshop control system based on PLC Download PDFInfo
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- CN209028469U CN209028469U CN201821957679.3U CN201821957679U CN209028469U CN 209028469 U CN209028469 U CN 209028469U CN 201821957679 U CN201821957679 U CN 201821957679U CN 209028469 U CN209028469 U CN 209028469U
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- lcu
- plc
- generator set
- water level
- input circuit
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Abstract
The utility model relates to power station fields, disclose a kind of anti-flooding workshop control system based on PLC, and when water logging workshop occurs, stopping signal is not judged by public LCU and host computer transfer, is directly entered in LCU for generator set, improves the reliability of system.The utility model includes LCU for generator set, PLC controller, relay and water level switch；The water level switch is connected in the input circuit of the PLC controller, and the coil of the relay is connected in the PLC controller output loop, and the relay normally open contact is connected in the input circuit of LCU for generator set.PLC is arranged not by the way of by host computer network transfer in the utility model on the spot, and stopping signal directly passes through the input circuit that cable is connected to LCU for generator set, keeps entire control system safer, reliable.The utility model is suitable for generator workshop.
Description
Technical field
The utility model relates to power station fields, in particular to the anti-flooding workshop control system based on PLC.
Background technique
The positions such as power station intake pressure steel pipe, top cover water largely leaks in order to prevent, causes water logging workshop, need to configure one
The control system of anti-flooding workshop is covered, is generally no less than 3 sets of water level switches, water level switch movement in the setting of workshop lowermost layer at present
Signal accesses the public LCU of computer supervisory control system, carries out three by public LCU and selects two judgements, is determining water logging workshop
It send stopping signal to host computer on public LCU afterwards, then forwards stopping signal to each LCU for generator set to start emergency episode by host computer
Shut down process.
Water level signal is sent from workshop bottommost to the public LCU of auxiliary power house, again passes through stopping signal after being judged by public LCU
Host computer transfers to each LCU for generator set and is shut down.This mode relies on network transfer, poor reliability.Water logging workshop is as great
Accident seriously threatens the safe and stable operation of power plant, reliably must timely shut down after the generation of water logging workshop, guarantee unit
And personal safety.
Utility model content
Technical problem to be solved by the utility model is: providing a kind of anti-flooding workshop control system based on PLC, work as water
When flooding workshop generation, stopping signal is not judged by public LCU and host computer transfer, is directly entered in LCU for generator set, improves system
Reliability.
To solve the above problems, the technical solution adopted in the utility model is: the anti-flooding workshop based on PLC controls system
System, including LCU for generator set, PLC controller, relay and water level switch；The water level switch is connected on the PLC controller
In input circuit, the coil of the relay is connected in the output loop of the PLC controller, the normally opened touching of the relay
Point is connected in the input circuit of LCU for generator set.
Further, the utility model further includes pressing plate, and the pressing plate is also connected in the input circuit of LCU for generator set, behaviour
Compressor emergency shutdown can be contacted by pressing plate by making personnel.
Further, at least 3 sets of the water level switch, each water level switch that covers are connected on the PLC controller respectively
Different input circuit kinds.If the water level switch has 3 sets, PLC controller can select two principles to judge water level signal on the spot by three,
It is shut down stopping signal to be more rationally fed directly to LCU for generator set.
The beneficial effects of the utility model are: PLC controller and relay is arranged in the utility model on the spot, controlled by PLC
Device processed judges water level signal, sends out stopping signal when confirming water logging workshop, stopping signal can directly be gone by cable connection
LCU for generator set is shut down, and entire Control System Design is simple, reliable, avoids the unreliable of traditional network transfer, guarantee system is more pacified
Full operation.
Detailed description of the invention
Fig. 1 is the input circuit schematic diagram of PLC controller in the utility model；
Fig. 2 is that the output loop of PLC controller in the utility model illustrates meaning；
Fig. 3 is a kind of connection type figure of input circuit of LCU for generator set in the utility model；
Fig. 4 is the input circuit another kind connection type figure of LCU for generator set in the utility model.
Number in figure: L is water level switch, and KA is the coil of relay, and KB is the normally opened contact of relay, and Y is pressing plate.
Specific embodiment
The explanation of noun involved in the present utility model application: PLC:Programmable Logic Controller can be compiled
Journey logic controller；LCU:Local Control Unit, local control unit: host computer: Upper Computer is directly sent out
The computer of manipulation command out.
The purpose of this utility model is that: when water logging workshop occurs, after stopping signal can not be judged by public LCU
Through host computer transfer, but increase PLC type controlling alarm case on the spot, access controlling alarm case nearby by water level switch, alarms
Control cabinet controls stopping signal by internal PLC and is fed directly to LCU for generator set and progress compressor emergency shutdown.As shown in Figure 1-3, this is practical
It is novel to provide a kind of anti-flooding workshop control system based on PLC, including LCU for generator set, PLC controller, relay and water
Bit switch L；The water level switch L is connected in the input circuit of the PLC controller, and the coil KA of the relay is connected on
In the output loop of the PLC controller, the normally opened contact KB of the relay is connected in the input circuit of LCU for generator set.
Compressor emergency shutdown is released for convenience of operator, as shown in figure 4, the utility model can also include pressing plate, it will be described
Pressing plate Y is also connected in the input circuit of LCU for generator set, so that operator can release compressor emergency shutdown by pressing plate Y.
In addition, providing more multiple input signals to give PLC controller, the accuracy of judgement, the water level switch are improved
At least 3 sets, each different input circuit kinds for covering water level switch and being connected on the PLC controller respectively.If the water level is opened
Pass has 3 sets, then PLC controller can select two principles to judge water level signal on the spot by three；If the water level switch has 4 sets, then PLC
Controller can select three principles to judge water level signal on the spot by four.
The working principle of the utility model is as follows:
When the water level of generator workshop is normal, the water level of workshop does not reach water level switch, at the water level switch L in Fig. 1
In off-state, PLC controller is not due to receiving input signal, because without issuing electric signal, unit work to LCU for generator set
Make；Once the water level abnormality of generator workshop, when reaching water level switch position, water level switch L would be at closed form in Fig. 1
State, so that PLC controller receives input signal, PLC controller will export electric signal to the coil KA of relay, so that after
The coil KA of electric appliance is charged, then the normally opened contact KB closure of relay, so that LCU for generator set receives electric signal, LCU for generator set exists
Compressor emergency shutdown will be controlled later by receiving electric signal.During compressor emergency shutdown, if operator needs to release compressor emergency shutdown, lead to
Crossing operated clamp can be so that the input circuit of LCU for generator set disconnects, to release compressor emergency shutdown.
From the foregoing, it will be observed that the utility model breaches the implementation pattern of traditional water logging workshop emergency shutdown, warp is not used
The mode of host computer network transfer is crossed, but PLC is set on the spot, stopping signal directly passes through cable and is connected to LCU for generator set or water
The input circuit of vehicle protection, keeps entire control system safer, reliable.
Claims (3)
1. the anti-flooding workshop control system based on PLC, which is characterized in that including LCU for generator set, PLC controller, relay and
Water level switch；The water level switch is connected in the input circuit of the PLC controller, and the coil of the relay is connected on institute
It states in the output loop of PLC controller, the normally opened contact of the relay is connected in the input circuit of LCU for generator set.
2. the anti-flooding workshop control system according to claim 1 based on PLC, which is characterized in that it further include pressing plate, institute
Pressing plate is stated also to be connected in the input circuit of LCU for generator set.
3. the anti-flooding workshop control system according to claim 2 based on PLC, which is characterized in that the water level switch
At least 3 sets, each different input circuit kinds for covering water level switch and being connected on the PLC controller respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821957679.3U CN209028469U (en) | 2018-11-23 | 2018-11-23 | Anti-flooding workshop control system based on PLC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821957679.3U CN209028469U (en) | 2018-11-23 | 2018-11-23 | Anti-flooding workshop control system based on PLC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209028469U true CN209028469U (en) | 2019-06-25 |
Family
ID=66910017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821957679.3U Active CN209028469U (en) | 2018-11-23 | 2018-11-23 | Anti-flooding workshop control system based on PLC |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209028469U (en) |
-
2018
- 2018-11-23 CN CN201821957679.3U patent/CN209028469U/en active Active
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