Subway train automatic cleaning machine control system based on PLC

Abstract

The invention relates to a subway train automatic cleaning machine control system based on a PLC. The subway train automatic cleaning machine control system comprises a PLC, and the output end of the PLC is electrically connected with a relay module and an electromagnetic valve module through a switching power supply module T1; a normally open contact of the KA1 is connected to a UPS power switch, a normally open contact of the KA2 is connected to an industrial personal computer switch, a normally open contact of the KA3 is connected to a monitoring switch, a normally open contact of the KA4 is connected to an air compressor switch, and normally open contacts of the KA5, the KA6, the KA7 and the KA8 are respectively connected to the DV1, the DV2, the DV3 and the DV4; the PLC technology is used for replacing the whole process mode of manual starting, starting inspection and shutdown of an automatic train cleaning machine, full-automatic control is achieved, the working efficiency can be greatly improved, and meanwhile invalid train cleaning caused by operation errors is avoided; manual links are simplified into one-key switching operation of the power knob SA1, so that operators do not need to be trained, and the workload and the cost of training are greatly reduced; and car washing operation faults caused by manual operation reasons are completely eradicated.

Description

Technical Field

[0001] The invention relates to the technical field of subway train cleaning, and in particular to a PLC-based subway train automatic cleaning machine control system. Background Art

[0002] The outer surface of subway vehicles becomes dirty as the running time increases due to the continuous attachment of dust. In order to remove these dirt, it is generally necessary to clean it every 3 to 5 days. As an important part of modern urban transportation, the neat appearance of the subway is not only a reflection of the city's image, but also a key factor in improving the passenger experience. Therefore, the cleaning of subway vehicles is particularly important and necessary.

[0003] In recent years, the cleaning of the outer surface of subway vehicles has gradually shifted from manual operation to automated equipment, and the cleaning technology has also developed from mobile and high-pressure cold water cleaning machines to fixed and low-pressure water jet cleaning machines. In order to improve the cleaning efficiency of subway trains, ensure their neat appearance and extend their service life, the application of automated cleaning equipment is particularly important. The automatic train cleaning machine is a high-tech equipment specially used to clean the exterior of light rail trains. Through a carefully designed water flow system, a detergent spraying device and an efficient brushing mechanism, it can fully clean dust, oil and various stubborn stains on both sides and the front and rear ends of the train. This process not only ensures the cleanliness of the train's appearance, but also extends the service life of the train, while reducing the frequency and cost of maintenance. However, the current automatic train cleaning machine faces the following problems during use:

[0004] According to the requirements of the train automatic cleaning machine operation and maintenance manual, after receiving the dispatch notice of car washing, the operator needs to make preparations before washing the car. The startup process is: turn on the main power switch - turn on the air compressor power switch - turn on the power supply of the operating console - turn on the air compressor - turn on the hard disk recorder (press and hold for 3-5 seconds) - turn on the UPS power - turn on the industrial computer; startup inspection (exhaust, drainage) process: open the air tank exhaust valve (at least 30 seconds) - turn on the manual rotary switch on the operating console - select the manual control interface in the operation interface - click DV3, DV4, DV5 to replenish water in the manual operation interface - manually open the ball valve —Wait for the water to continue to spray for 10 seconds—manually close the ball valve; Shutdown process: turn off the industrial computer in the computer interface—turn off the UPS power—turn off the hard disk recorder power (press and hold for 3-5 seconds)—turn off the console power—turn off the main control cabinet power switch. The existing train automatic cleaning machine operation process includes the opening and closing of multiple independent components such as the air compressor, hard disk recorder, industrial computer, UPS, etc. After the operating system is started, it is necessary to perform operations such as replenishing water and exhausting the air and water supply circuits. The whole process has many steps and is time-consuming. Skipping or missing steps can easily lead to invalid car washing, and high skills are required for the operator. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a PLC-based subway train automatic cleaning machine control system to overcome the deficiencies in the above-mentioned prior art.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: a subway train automatic cleaning machine control system based on PLC, including a PLC controller, the output end of the PLC controller is electrically connected to a relay module and a solenoid valve module through a switch power module T1, and the input end of the PLC controller is electrically connected to a power knob SA1; the relay module includes relay KA1, relay KA2, relay KA3, relay KA4, relay KA5, relay KA6, relay KA7 and relay KA8, and the solenoid valve module includes solenoid valve DV1, solenoid valve DV2, solenoid valve DV3 and solenoid valve DV4;

[0007] The normally open contact of KA1 is connected to the UPS power switch, the normally open contact of KA2 is connected to the industrial computer switch, the normally open contact of KA3 is connected to the monitoring switch, the normally open contact of KA4 is connected to the air compressor switch, and the normally open contacts of KA5, KA6, KA7 and KA8 are connected to DV1, DV2, DV3 and DV4 respectively;

[0008] DV1 is used for the exhaust control of the gas storage tank; DV2, DV3 and DV4 are used for the water replenishment control of the three pump front water replenishment tanks respectively.

[0009] The beneficial effects of the present invention are as follows: the PLC technology is used to replace the manual start-up, start-up inspection, and shutdown of the train automatic washing machine to achieve full automatic control, which can greatly improve work efficiency and avoid ineffective car washing caused by operating errors; the total time for starting and stopping the machine is reduced from no less than 30 minutes to no more than 1 minute, saving 96.7% of the manual operation time, and the number of operators is also reduced from 2 to 1; the manual links are simplified to one-touch switching by operating the power knob SA1, so there is no need to train the operators, which greatly reduces the workload and cost of training; and the car washing operation failures caused by human operation are eliminated.

[0010] Based on the above technical solution, the present invention can also be improved as follows.

[0011] Further, a short circuit protection circuit is included, and the short circuit protection circuit includes a circuit breaker QF1, a circuit breaker QF2, a circuit breaker QF3 and a circuit breaker QF4;

[0012] The incoming end of circuit breaker QF1 is connected to an external power supply circuit, the outgoing end of circuit breaker QF1 is connected to the incoming ends of circuit breakers QF2 and QF3, the outgoing end of circuit breaker QF2 is electrically connected to the power input pin of the PLC, the outgoing end of circuit breaker QF3 is electrically connected to the incoming end of circuit breaker QF4 through the switching power supply module T1, and the outgoing end of circuit breaker QF4 is electrically connected to the solenoid valve module.

[0013] Furthermore, the short-circuit protection circuit also includes a filter BL1; the filter BL1 is electrically connected between the PLC controller and the circuit breaker QF2.

[0014] Furthermore, the output end of the PLC controller is also electrically connected to an indicator light module, which includes a system power-on indicator light, a startup completion indicator light, an industrial computer uninterruptible power supply on indicator light, an industrial computer on indicator light, a hard disk recorder on indicator light, an air machine on indicator light, a DV1 on indicator light, a DV2 on indicator light, a DV3 on indicator light and a DV4 on indicator light.

[0015] Furthermore, it also includes an output expansion module, which is electrically connected to the PLC controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The electrical control principle of the present invention Figure 1 ;

[0017] Figure 2 The electrical control principle of the present invention Figure 2 ;

[0018] Figure 3 This is a pipeline connection diagram of the three pump front water replenishment tanks and the solenoid valve module of the present invention. DETAILED DESCRIPTION

[0019] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0020] like Figure 1 to Figure 3 As shown, in Example 1, a PLC-based subway train automatic cleaning machine control system includes a PLC controller, the output end of the PLC controller is electrically connected to a relay module and a solenoid valve module through a switch power module T1, and the input end of the PLC controller is electrically connected to a power knob SA1; the relay module includes a relay KA1, a relay KA2, a relay KA3, a relay KA4, a relay KA5, a relay KA6, a relay KA7 and a relay KA8, and the solenoid valve module includes a solenoid valve DV1, a solenoid valve DV2, a solenoid valve DV3 and a solenoid valve DV4;

[0021] The normally open contact of KA1 is connected to the UPS power switch, the normally open contact of KA2 is connected to the industrial computer switch, the normally open contact of KA3 is connected to the monitoring switch, the normally open contact of KA4 is connected to the air compressor switch, and the normally open contacts of KA5, KA6, KA7 and KA8 are connected to DV1, DV2, DV3 and DV4 respectively;

[0022] DV1 is used for the exhaust control of the gas storage tank; DV2, DV3 and DV4 are used for the water replenishment control of the three pump front water replenishment tanks respectively.

[0023] The use of PLC technology to replace the manual start-up, start-up inspection, and shutdown of the train automatic washing machine can achieve full automatic control, which can greatly improve work efficiency and avoid ineffective car washing caused by operating errors. The total time for starting and stopping the machine is reduced from no less than 30 minutes to no more than 1 minute, saving 96.7% of manual operation time, and the number of operators is reduced from 2 to 1. The manual process is simplified to one-touch switching by operating the power knob SA1, so there is no need to train the operators, greatly reducing the workload and cost of training; and the car washing operation failure caused by human operation is eliminated.

[0024] In the specific implementation, DV1, DV2, DV3 and DV4 are respectively connected in parallel with the original manual rotary ball valves of the air storage tank and the three pump front water supply tanks (see Figure 3 ).

[0025] Embodiment 2: This embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0026] Also includes a short circuit protection circuit, the short circuit protection circuit includes a circuit breaker QF1, a circuit breaker QF2, a circuit breaker QF3 and a circuit breaker QF4;

[0027] The incoming end of circuit breaker QF1 is connected to an external power supply circuit, the outgoing end of circuit breaker QF1 is connected to the incoming ends of circuit breakers QF2 and QF3, the outgoing end of circuit breaker QF2 is electrically connected to the power input pin of the PLC, the outgoing end of circuit breaker QF3 is electrically connected to the incoming end of circuit breaker QF4 through the switching power supply module T1, and the outgoing end of circuit breaker QF4 is electrically connected to the solenoid valve module.

[0028] For the sake of safety and stability, protective measures are adopted. Circuit breakers QF1, QF2, QF3 and QF4 are connected to the control circuit. When the current exceeds the specified value for a period of time, the bimetallic strip deforms to a certain extent and drives the mechanism to operate, thereby disconnecting the circuit and protecting the circuit.

[0029] Embodiment 3, this embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0030] The short-circuit protection circuit also includes a filter BL1; the filter BL1 is electrically connected between the PLC controller and the circuit breaker QF2. There are often various noises and sudden voltage fluctuations in the power supply, which will affect the normal operation of the equipment. The filter BL1 can effectively block these noises and fluctuations, provide clean and stable power supply for electronic equipment, thereby improving the working efficiency of the equipment and protecting the equipment from damage caused by excessive voltage or current shock.

[0031] Embodiment 4: This embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0032] The output end of the PLC controller is also electrically connected to an indicator light module, which includes a system power-on indicator light, a power-on completion indicator light, an industrial computer uninterruptible power supply on indicator light, an industrial computer on indicator light, a hard disk video recorder on indicator light, an air machine on indicator light, a DV1 on indicator light, a DV2 on indicator light, a DV3 on indicator light, and a DV4 on indicator light. The corresponding indicator light of each component starts up, and when the power-on and power-on inspection are successfully completed, the corresponding indicator light of the preparation is lit, which allows the operator to intuitively view its working status.

[0033] Embodiment 5, this embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0034] It also includes an output expansion module, which is electrically connected to the PLC controller. The PLC controller has 1 control digital input signal, 1 analog input signal, and 18 digital outputs. According to the required functions, the nature of the input and output signals, the memory capacity, and the number of I / O points, a PLC controller model FX3U-32MRES-A is selected. Considering the expansion of later functions, an output expansion module FX2N-16EYR is added, and the analog module FX3U-3A-ADP is selected. It is relatively cheap, has high reliability, and its performance can meet the requirements.

[0035] Specific working principle:

[0036] In order to solve the problem that the operation process has many steps, is time-consuming, and is prone to ineffective car washing due to skipped steps or missing steps, this technical solution uses PLC to control relays instead of personnel to perform sequential operations on individual equipment.

[0037] By operating the power knob SA1 to start, the program control relay KA1 is energized, and the normally open contact of KA1 is connected to the UPS power switch. After the normally open contact is closed, the UPS power is turned on.

[0038] After the UPS power supply is turned on, relay KA2 is energized, and the normally open contact of KA2 is connected to the switch of the industrial computer. After the normally open contact is closed, the industrial computer is turned on.

[0039] After the industrial computer is turned on, relay KA3 is energized (3 seconds), and the normally open contact of KA3 is connected to the power switch of the digital hard disk recorder. After the normally open contact is closed, the digital hard disk recorder is turned on.

[0040] After the digital video recorder is turned on, relay KA4 is energized, and the normally open contact of KA4 is connected to the air compressor switch. After the normally open contact is closed, the air compressor is turned on.

[0041] After the air compressor is turned on, relay KA5 is energized, and the normally open contact of KA5 controls the solenoid valve to exhaust (the original manual rotating ball valve is used for exhaust, and now a solenoid valve pipeline is connected in parallel to exhaust through the solenoid valve). After the normally open contact is closed, the solenoid valve opens to exhaust and closes after a certain period of time.

[0042] Relays KA6, KA7, and KA8 are energized, and the normally open contacts of KA6, KA7, and KA8 control the solenoid valve to replenish water in front of the pump (the original manual rotary ball valve was used to replenish water, and now a solenoid valve pipeline is connected in parallel to replenish water through the solenoid valve, see Figure 3 ).

[0043] After the above is completed, a signal light will appear to indicate that the startup and startup inspection have been completed and the car can be washed.

[0044] After washing the car, click the shutdown button on the screen. After the analog module detects that the power of the industrial computer is turned off, the relay KA1 loses power and the UPS power is turned off; the relay KA2 is energized (3 seconds), and the digital hard disk recorder is turned off. The shutdown of the entire equipment is completed, and the main power can be turned off.

[0045] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A PLC-based subway train automatic cleaning machine control system, characterized in that: It includes a PLC controller, the output end of the PLC controller is electrically connected to a relay module and a solenoid valve module through a switch power module T1, and the input end of the PLC controller is electrically connected to a power knob SA1; the relay module includes a relay KA1, a relay KA2, a relay KA3, a relay KA4, a relay KA5, a relay KA6, a relay KA7 and a relay KA8, and the solenoid valve module includes a solenoid valve DV1, a solenoid valve DV2, a solenoid valve DV3 and a solenoid valve DV4; The normally open contact of KA1 is connected to the UPS power switch, the normally open contact of KA2 is connected to the industrial computer switch, the normally open contact of KA3 is connected to the monitoring switch, the normally open contact of KA4 is connected to the air compressor switch, and the normally open contacts of KA5, KA6, KA7 and KA8 are connected to DV1, DV2, DV3 and DV4 respectively; The DV1 is used for exhaust control of the gas storage tank; the DV2, DV3 and DV4 respectively control the water replenishment of the three water replenishment tanks before the pumps.

2. A PLC-based subway train automatic cleaning machine control system according to claim 1, characterized in that: Also includes a short circuit protection circuit, the short circuit protection circuit includes a circuit breaker QF1, a circuit breaker QF2, a circuit breaker QF3 and a circuit breaker QF4; The input end of the circuit breaker QF1 is connected to an external power supply circuit, the output end of the circuit breaker QF1 is connected to the input ends of the circuit breakers QF2 and QF3, the output end of the circuit breaker QF2 is electrically connected to the power input pin of the PLC, the output end of the circuit breaker QF3 is electrically connected to the input end of the circuit breaker QF4 through the switching power module T1, and the output end of the circuit breaker QF4 is electrically connected to the solenoid valve module.

3. A PLC-based subway train automatic cleaning machine control system according to claim 2, characterized in that: The short-circuit protection circuit further includes a filter BL1 ; the filter BL1 is electrically connected between the PLC controller and the circuit breaker QF2 .

4. A PLC-based subway train automatic cleaning machine control system according to claim 1, characterized in that: The output end of the PLC controller is also electrically connected to an indicator light module, which includes a system power-on indicator light, a startup completion indicator light, an industrial computer uninterruptible power supply on indicator light, an industrial computer on indicator light, a hard disk video recorder on indicator light, an air machine on indicator light, a DV1 on indicator light, a DV2 on indicator light, a DV3 on indicator light and a DV4 on indicator light.

5. A PLC-based subway train automatic cleaning machine control system according to claim 1, characterized in that: It also includes an output expansion module, and the output expansion module is electrically connected to the PLC controller.

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