CN202789468U - Control system for drainage of metro - Google Patents

Abstract

The utility model discloses a control system for drainage of a metro. The control system comprises a PLC (Programmable Logic Controller) operating platform and a drainage pump, and is characterized in that the PLC operating platform is connected with a timing control device for opening or closing the drainage pump. According to the control system, the drainage pump can be regularly/periodically controlled, so that the drainage pump discontinuously operates to prevent reduction in service life of the drainage pump due to no action of the drainage pump for long time.

Description

A Control System for Subway Drainage

technical field

The utility model relates to a control system for subway drainage.

Background technique

The subway drainage system can be mainly divided into three types: namely, sewage drainage system, waste water drainage system and rainwater drainage system. For above-mentioned three kinds of drainage systems are all automatic control now.

The three groups of systems all need to involve the drainage pump. At present, the drainage pump is automatically controlled through the transmission of ultrasonic signals, which can be roughly divided into two ways: one is to install the ultrasonic level gauge in the water collection well, and then through the PLC Obtain the signal from the water level switch. When the signal reaches the pre-adjusted water level, the corresponding switch in the control system will automatically start/stop the drainage pump. The second is that the ultrasonic liquid level gauge is installed in the water collection well, and the PLC obtains the water level signal from the ultrasonic liquid level gauge in the water collection well, and then the PLC control system automatically controls the operation of the drainage water pump.

In the above two methods, the mutual transmission of the ultrasonic signal and the control system is used to control the on/off of the drainage pump, but if the pump is not operated for a long time in the sump well, the insulation resistance of the motors in these drainage pumps will decrease. There will be a certain amount of decline, which will affect the life of the pump and the normal operation of the control system in the long run.

Contents of the invention

Aiming at the deficiencies of the prior art, the utility model provides a subway drainage control system, which can control the drainage pump regularly/periodically, so that the drainage pump runs intermittently, so as to avoid the drainage pump not running for a long time and causing the drainage pump to be damaged. service life is reduced.

In order to achieve the above technical purpose, the utility model is achieved through the following technical solutions.

A subway drainage control system includes a PLC operating platform and a drainage water pump, and the PLC operating platform is connected with a timing control device for opening or closing the drainage water pump.

In the above technical solution, the PLC operation platform includes a central processing unit, the central processing unit is connected with a programmer, and the central processing unit is also connected with a first memory and a second memory.

The beneficial effect of the utility model is that, through the drainage system, a time can be artificially set before use, and the timing control device is prompted to operate according to the set time, so that the drainage water pump can realize intermittent operation and increase the use of the drainage water pump life.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic diagram of the PLC operating platform in the utility model.

Detailed ways

A control system for subway drainage of the present invention will be described in further detail below in conjunction with the accompanying drawings.

Referring to Fig. 1 ~ Fig. 2, a kind of subway drainage control system comprises PLC operation platform 1, and described PLC operation platform 1 comprises central processing unit 2, and described central processing unit 2 is respectively connected with programmer 3, input circuit 4, Output circuit 5 , first memory 6 , second memory 7 .

The subway drainage control system also includes a drainage water pump 8, and a timing control device 9 for opening or closing the drainage water pump 8 is connected between the PLC operation platform 1 and the drainage water pump 8. Through the timing control device 9 , the drainage water pump 8 can be controlled to make the drainage water pump 8 operate intermittently, so as to prevent the problem of the service life of the drainage water pump 8 being reduced due to long-term non-operation.

The specific working principle is as follows: first, the input circuit 4 is transmitted to the central processing unit 2, and the information of the first memory 6 and the second memory 7 is sent to the central processing unit 2, and then the corresponding operating program is input through the programmer 3. , and then set the required time on the timing control device 9, so that the intermittent operation of the drainage water pump 8 can be realized.

Claims (2)

1. the control system of a subway draining, comprise PLC operating platform (1), draining water pump (8) is characterized in that, described PLC operating platform (1) is connected with for the timing control apparatus (9) of opening or closing described draining water pump (8) with described draining water pump (8).

2. the control system of a kind of subway draining according to claim 1, it is characterized in that, described PLC operating platform (1) comprises central processing unit (CPU) (2), described central processing unit (CPU) (2) is connected with programmable device (3), input circlult (4), output circuit (5), and described central processing unit (CPU) (2) also is connected with first memory (6) and second memory (7).

Images