A safe and reliable automatic ground unloading system for railway freight hopper cars

Abstract

The present invention discloses a safe and reliable ground automatic unloading system for railway freight hopper cars, including Siemens PLC 1, the Siemens PLC 1 is electrically connected to a relay, the contactor is electrically connected to an unlocking block motor and a locking block motor, the Siemens PLC 1 is electrically connected to a proximity switch, the Siemens PLC 1 is electrically connected to a DC power supply A, the Siemens PLC 1 is electrically connected to a measuring light curtain, the Siemens PLC 1 is electrically connected to a beam ultrasonic sensor, the Siemens PLC 1 is electrically connected to Siemens PLC 2, the wireless transmission device is wirelessly connected to a network hard disk, and the network hard disk is electrically connected to an industrial switch. The safe and reliable ground automatic unloading system for railway freight hopper cars described in the present invention has a handshake polling between the two systems to inform the normal or faulty conditions of the system, the host PLC and the auxiliary PLC simultaneously transmit remote communication data to the central control console independently through the industrial switch, and once an abnormal state occurs, the central control console can issue an alarm message, suspend or handle the fault.

Description

Technical Field

[0001] The invention relates to the field of unloading of railway freight cars, and in particular to a safe and reliable ground automatic unloading system for railway freight hopper cars. Background Art

[0002] The existing bottom-opening hopper railway freight cars which use bottom-opening doors to unload bulk goods such as iron ore, coal, sulfur, and grain are widely used abroad because of their automatic, efficient, energy-saving, safe and reliable unloading operations. Among them, the power-free form of using ground facilities to arrange door opening touch stations and door closing touch stations in conjunction with bottom-opening railway freight cars is particularly widely used. At present, China Shenhua Company is also conducting trial operation and gradually promoting it. Its basic control principle is that the door opening touch station arranged by the ground facilities moves to the working position and touches the door opening arm on the opening and closing mechanism of the bottom door of the hopper car to rotate it to a certain angle, thereby opening the bottom door of the hopper car to achieve the function of fast coal unloading, and the door closing touch station arranged by the ground facilities moves to the working position and touches the door closing arm on the opening and closing mechanism of the bottom door of the hopper car to rotate it to a certain angle, thereby opening the bottom door of the hopper car to achieve the function of fast coal unloading. The bottom door is closed by a certain angle of reverse rotation. After the bottom door hopper railway wagon is unloaded, the door opening touch platform and the door closing touch platform arranged on the ground facilities need to be restored to the avoidance position (outside the railway wagon limit) to ensure the normal operation of the traction locomotive and other railway wagons. At present, the door opening touch platform and the door closing touch platform arranged on the ground facilities used in foreign countries are mostly swing lifting structures, and the touch top plates of the door opening touch platform and the door closing touch platform and the touch arm rollers of the bottom door hopper wagon are subjected to eccentric force, which will swing during operation and there is a risk of the bottom door not being closed in place. The electrical control solution adopts the RFID card reading system to identify the situation of the freight car compartment, and it is used successfully, but the maintenance and management brought by RFID are more cumbersome and costly.

[0003] Therefore, it is necessary to propose a safe and reliable ground automatic unloading system for railway freight hopper cars to solve the above problems. Summary of the invention

[0004] The main purpose of the present invention is to provide a safe and reliable ground automatic unloading system for railway freight hopper cars, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A safe and reliable ground automatic unloading system for railway freight hopper cars comprises a Siemens PLC1, the Siemens PLC1 is electrically connected to a relay, the relay is electrically connected to a contactor, the contactor is electrically connected to an unlocking block motor and a locking block motor, the Siemens PLC1 is electrically connected to a proximity switch, the Siemens PLC1 is electrically connected to a leaking bin and a full bin sensor, the Siemens PLC1 is electrically connected to a DC power supply A, the Siemens PLC1 is electrically connected to a measuring light curtain, the Siemens PLC1 is electrically connected to a counter-beam ultrasonic sensor, the Siemens PLC1 is electrically connected to an HMI, the Siemens PLC1 is electrically connected to a Siemens PLC2, the Siemens PLC1 is electrically connected to a wireless transmission device, the wireless transmission device is wirelessly connected to a driver warning station, the wireless transmission device is wirelessly connected to a network hard disk, and the network hard disk is electrically connected to an industrial switch.

[0007] Preferably, the output end of the Siemens PLC is electrically connected to two relays, the input ends of the two relays are electrically connected to the output end of the Siemens PLC, the output ends of the two relays are electrically connected to the input ends of two contactors, and the output ends of the two contactors are electrically connected to the input ends of the unlocking block motor and the locking block motor respectively.

[0008] Preferably, the input end of the Siemens PLC-1 is electrically connected to the output end of the measuring light curtain, the input end of the Siemens PLC-1 is electrically connected to the output end of the reflected ultrasonic wave, the input end of the Siemens PLC-1 is electrically connected to the output end of the HMI, the input end of the Siemens PLC-1 is electrically connected to the output end of the proximity switch, the input end of the Siemens PLC-1 is electrically connected to the output end of the leaking bin and full bin sensor, the output end of the Siemens PLC-1 is electrically connected to the input end of the DC power supply A, and the output-input end of the Siemens PLC-1 is electrically connected to the output-input point of the wireless transmission device.

[0009] Preferably, the output and input ends of the network hard disk are electrically connected to the output and input ends of the industrial switch, the output and input ends of the industrial switch are electrically connected to the output and input ends of the camera, the output and input ends of the industrial switch are electrically connected to the output and input ends of the network video recorder, and the output and input ends of the network video recorder are electrically connected to the output and input ends of the video display.

[0010] Preferably, the output end and input end of the Siemens PLC 1 are electrically connected to the output end and input end of the Siemens PLC 2, the Siemens PLC 2 is electrically connected to other safety sensors, the counter-beam ultrasonic sensor is electrically connected to the Siemens PLC 2, and the proximity switch is electrically connected to the Siemens PLC 2.

[0011] Preferably, the input end of the Siemens PLC 2 is electrically connected to the output end of the proximity switch, the input end of the Siemens PLC 2 is electrically connected to the output end of the opposing ultrasonic sensor, the input end of the Siemens PLC 2 is electrically connected to the output end of other safety sensors, and the output end of the Siemens PLC 2 is electrically connected to the input end of the DC power supply B. Beneficial Effects

[0012] Compared with the prior art, the present invention provides a safe and reliable ground automatic unloading system for railway freight hopper cars, which has the following beneficial effects:

[0013] This safe and reliable railway freight hopper car ground automatic unloading system adopts dual PLC redundant mode. A Siemens PLC 1 and Siemens PLC 2 play the function of independent detection and control, which can fully realize the function of automatic unloading. An auxiliary PLC plays the function of redundant sensor detection. The two systems always handshake and poll to inform the normal or fault status of the system. The host PLC and auxiliary PLC independently transmit remote communication data to the central control console through the industrial switch at the same time. Once an abnormal state occurs, the central control console can issue an alarm message, pause or handle the fault.

[0014] This is a safe and reliable railway freight hopper car ground automatic unloading system. The electrical control solution of this system adopts RFID card reading system to identify the situation of freight car compartments. Each car needs to install 2 pieces, and the installation cost is relatively high. The adoption of new design scheme can greatly reduce the cost. Freight vehicles need to run outdoors for a long time, which is prone to damage and loss, and maintenance and management are relatively cumbersome. The new design scheme only needs to maintain the unloading yard equipment, which is more convenient to maintain and manage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is the electrical schematic diagram of the present invention. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0018] like Figure 1-2As shown, a safe and reliable ground automatic unloading system for railway freight hopper cars includes a Siemens PLC 1, a Siemens PLC 1 is electrically connected to a relay, a relay is electrically connected to a contactor, a contactor is electrically connected to an unlocking block motor and a locking block motor, a Siemens PLC 1 is electrically connected to a proximity switch, a Siemens PLC 1 is electrically connected to a leaking bin and a full bin sensor, a Siemens PLC 1 is electrically connected to a DC power supply A, a Siemens PLC 1 is electrically connected to a measuring light curtain, a Siemens PLC 1 is electrically connected to a beam ultrasonic sensor, a Siemens PLC 1 is electrically connected to an HMI, a Siemens PLC 1 is electrically connected to a Siemens PLC 2, and a Siemens PLC 1 is electrically connected to a The wireless transmission device is wirelessly connected to the driver warning station, the wireless transmission device is wirelessly connected to the network hard disk, the network hard disk is electrically connected to the industrial switch, the output end of the Siemens PLC is electrically connected to two relays, the input ends of the two relays are electrically connected to the output end of the Siemens PLC, the output ends of the two relays are electrically connected to the input ends of the two contactors, the output ends of the two contactors are electrically connected to the input ends of the unlocking block motor and the locking block motor respectively, the input end of the Siemens PLC is electrically connected to the output end of the measuring light curtain, the input end of the Siemens PLC is electrically connected to the output end of the ultrasonic wave, and the Siemens PLC The input end of the Siemens PLC is electrically connected to the output end of the HMI, the input end of the Siemens PLC is electrically connected to the output end of the proximity switch, the input end of the Siemens PLC is electrically connected to the output end of the leaking bin and full bin sensor, the output end of the Siemens PLC is electrically connected to the input end of the DC power supply A, the output and input ends of the Siemens PLC are electrically connected to the output and input points of the wireless transmission device, the output and input ends of the network hard disk are electrically connected to the output and input ends of the industrial switch, the output and input ends of the industrial switch are electrically connected to the output and input ends of the camera, the output and input ends of the industrial switch are electrically connected to the output and input ends of the network video recorder, and the output and input ends of the network video recorder are electrically connected to the output and input ends of the network video recorder. The end is electrically connected to the output and input ends of the video display, the output and input ends of Siemens PLC one are electrically connected to the output and input ends of Siemens PLC two, Siemens PLC two is electrically connected to other safety sensors, the counter-beam ultrasonic sensor is electrically connected to Siemens PLC two, the proximity switch is electrically connected to Siemens PLC two, the input end of Siemens PLC two is electrically connected to the output end of the proximity switch, the input end of Siemens PLC two is electrically connected to the output end of the counter-beam ultrasonic sensor, the input end of Siemens PLC two is electrically connected to the output ends of other safety sensors, and the output end of Siemens PLC two is electrically connected to the input end of DC power supply B.

[0019] It should be noted that the present invention is a safe and reliable ground automatic unloading system for railway freight hopper cars. It detects the presence of carriages within the area through a through-beam ultrasonic sensor, especially detects the gaps between freight car carriages. At the same time, a measuring light curtain is used to measure the gaps between freight car carriages. The distance between the traction locomotive and the freight car carriage is different from the distance between the freight car carriages, so as to identify the traction locomotive and the freight car. The system adopts a dual redundant detection scheme. At a certain detection point, a pair of through-beam ultrasonic sensors detects the presence or absence of a carriage passing through, a pair of measuring light curtains detects the gaps between the carriages, and another pair of through-beam ultrasonic sensors redundantly detects the presence or absence of a carriage passing through, and inputs the information to another controller. The two pairs of through-beam ultrasonic sensors installed on the ground The sensor and a pair of measuring light curtains are used as a set of detection units, with a spacing of 13700mm. The detection unit mainly plays the role of safety detection. It confirms the truck or locomotive by measuring the idle distance between the trucks. After obtaining this information, the control system can safely control the subsequent door opening touch station and door closing touch station. The unloading train is a locomotive pulling the truck from left to right in front. Due to the different lengths of the locomotive and the truck, the detection unit 1 cannot obtain data at the same time. The system will control the door opening touch station to the avoidance position, and the locomotive passes normally. After the detection unit 1 detects the truck data, the control system controls the working door opening touch station to move to the working position to unload the truck. At the same time, the detection unit 1 and the detection unit 3 will determine the unloading control started by the operator. Whether the direction of the control button is correct, if there is an abnormality, an alarm will be sounded to notify the locomotive to stop. The unloading train is the locomotive pushing the truck from left to right. After the detection unit 1 detects the truck data, the control system controls the working door touch platform to move to the working position to unload the truck. When the locomotive enters the unloading warehouse at the back, due to the different lengths of the locomotive and the truck, the detection unit 1 cannot obtain data at the same time. The system will control the door touch platform to return to the avoidance position, and the locomotive passes normally. When the truck enters the detection position of the detection unit 1, the system will control the operating table and the driver warning box installed on the locomotive to send out an audible and visual alarm, and the green light of the traffic signal light component will go out and the red light will light up, notifying the traction locomotive to stop. After the cargo stack falls to the normal state, 2 capacitive proximity sensors It will be fed back to the control system, and the system will control the operating console and the wireless receiver installed on the locomotive to light up the green light, and the red light of the traffic light component will go out and the green light will be on, notifying the traction locomotive to operate normally, and so on, to complete the parking and unloading of the entire train. This system adopts the redundant mode of dual PLC. A host PLC has the function of independent detection and control, and can fully realize the function of automatic unloading. An auxiliary PLC has the function of redundant sensor detection. The two systems have been handshaking and polling to inform the normal or fault status of the system. The host PLC and the auxiliary PLC simultaneously transmit remote communication data to the central control console independently through the industrial switch. Once an abnormal state occurs, the central control console can issue an alarm message, pause or handle the fault.

[0020] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A safe and reliable railway freight hopper car ground automatic unloading system, including Siemens PLC, characterized by: The Siemens PLC1 is electrically connected to a relay, the relay is electrically connected to a contactor, the contactor is electrically connected to an unlocking block motor and a locking block motor, the Siemens PLC1 is electrically connected to a proximity switch, the Siemens PLC1 is electrically connected to a leaking bin and a full bin sensor, the Siemens PLC1 is electrically connected to a DC power supply A, the Siemens PLC1 is electrically connected to a measuring light curtain, the Siemens PLC1 is electrically connected to a beam ultrasonic sensor, the Siemens PLC1 is electrically connected to an HMI, the Siemens PLC1 is electrically connected to a Siemens PLC2, the Siemens PLC1 is electrically connected to a wireless transmission device, the wireless transmission device is wirelessly connected to a driver warning station, the wireless transmission device is wirelessly connected to a network hard disk, and the network hard disk is electrically connected to an industrial switch; The output end of the Siemens PLC 1 is electrically connected to two relays, the input ends of the two relays are electrically connected to the output end of the Siemens PLC 1, the output ends of the two relays are electrically connected to the input ends of two contactors, and the output ends of the two contactors are electrically connected to the input ends of the unlocking block motor and the locking block motor respectively; The input end of the Siemens PLC 1 is electrically connected to the output end of the measuring light curtain, the input end of the Siemens PLC 1 is electrically connected to the output end of the reflected ultrasonic wave, the input end of the Siemens PLC 1 is electrically connected to the output end of the HMI, the input end of the Siemens PLC 1 is electrically connected to the output end of the proximity switch, the input end of the Siemens PLC 1 is electrically connected to the output end of the leaking bin and full bin sensor, the output end of the Siemens PLC 1 is electrically connected to the input end of the DC power supply A, and the output and input ends of the Siemens PLC 1 are electrically connected to the output and input points of the wireless transmission device; The output and input terminals of the network hard disk are electrically connected to the output and input terminals of the industrial switch, the output and input terminals of the industrial switch are electrically connected to the output and input terminals of the camera, the output and input terminals of the industrial switch are electrically connected to the output and input terminals of the network video recorder, and the output and input terminals of the network video recorder are electrically connected to the output and input terminals of the video display; The output end and input end of the Siemens PLC 1 are electrically connected to the output end and input end of the Siemens PLC 2, the Siemens PLC 2 is electrically connected to other safety sensors, the opposing ultrasonic sensor is electrically connected to the Siemens PLC 2, and the proximity switch is electrically connected to the Siemens PLC 2; The input end of the Siemens PLC 2 is electrically connected to the output end of the proximity switch, the input end of the Siemens PLC 2 is electrically connected to the output end of the opposing ultrasonic sensor, the input end of the Siemens PLC 2 is electrically connected to the output end of other safety sensors, and the output end of the Siemens PLC 2 is electrically connected to the input end of the DC power supply B.

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