CN-121974173-A - Safety interlocking device and method for empty line operators of railway vehicle tipper

CN121974173ACN 121974173 ACN121974173 ACN 121974173ACN-121974173-A

Abstract

The invention relates to a safety interlocking device and a safety interlocking method for empty line operators of a railway vehicle dumper, comprising an interlocking control box arranged on an empty line site, wherein the interlocking control box is provided with a two-position change-over switch, the two-position change-over switch is provided with two gears of an inspection position and a dumper position, an oil pump power supply of the dumper is physically cut off in the inspection position, and a program of a PLC control system of the dumper is configured to seal the output of all the trolley motor operation instructions in the inspection position state, so that an empty line protection signal lamp constantly displays red, and shield or strengthen a signal of an invalid transfer table in the alignment position of the empty line. The invention gives initiative of safety interlocking to operators at risk directly on site, eliminates intermediate link risk caused by communication and operation of remote operators, combines hardware loop cutting and software program blocking, and forms insurmountable double locking for car puller, and the safety is far beyond that of a single software lock or relies on manual switch.

Inventors

Kang Zhenli
CHENG ZHIBO
CHEN TAO
CHEN BING
ZHAO WENBIN
LUO JIANGUO

Assignees

宝武集团鄂城钢铁有限公司

Dates

Publication Date: 20260505
Application Date: 20260326

Claims (10)

1. The safety interlocking device for the empty line operators of the railway vehicle dumper comprises a dumper PLC control system, a dumper locking loop, a dumper variable frequency oil pump driving power supply loop, an empty line protection signal forced loop and a transfer platform in-place signal loop in the empty line alignment, and is characterized by also comprising an interlocking control box arranged on the empty line site, wherein the interlocking control box is provided with a two-position change-over switch, and the two-position change-over switch is provided with two gears of an inspection position and a dumper position, and the contact states of the two gears of the inspection position and the dumper position are used for outputting a switch signal representing a safety locking state; The method comprises the steps that a first group of contacts with states changed when a two-position change switch is at an inspection position or a contact of a first intermediate relay driven by the group of contacts is connected in series to a variable-frequency oil pump driving power supply loop of the car pusher, and the variable-frequency oil pump driving power supply loop is used for physically cutting off an oil pump power supply of the car pusher when the two-position change switch is at the inspection position; The program of the PLC control system of the car dumper is configured to block the output of all the car pushing motor driving instructions when the first locking enabling signal is valid; And when the second locking enabling signal is valid, controlling the empty line protection signal forced loop and the transfer platform to align in-place in the empty line, enabling the empty line protection signal lamp to constantly display red, and shielding or strongly setting a signal that the invalid transfer platform is aligned in-place in the empty line.
2. The apparatus of claim 1, wherein the first lock enable signal and the second lock enable signal are generated by different sets of contacts of a single two-position transfer switch or by different sets of auxiliary contacts of a single second intermediate relay driven by the switch contacts.
3. The apparatus of claim 1, wherein the first lock enable signal is serially connected in a "normally closed" condition before the final output logic of all motion commands of the car dumper in a program of the PLC control system of the car dumper.
4. The safety interlock device for empty line operators of a railway vehicle dumper according to claim 1, wherein the interlock control box is integrated with a biological characteristic recognition module and/or an RFID identity recognition module for uniquely recognizing the identities of the operators.
5. The safety interlocking device for the empty line operators of the railway vehicle tipper of claim 4, further comprising a network communication module, a platform and an interaction module, wherein the network communication module is connected with an interlocking control box, a tipper PLC control system, a safety interlocking server and a mobile interaction terminal, the platform and interaction module comprises the safety interlocking server and a terminal interaction interface, the safety interlocking server is used for processing interlocking logic and storing safety logs, the multi-terminal interaction interface at least comprises a tipper main control console display unit and a locomotive vehicle-mounted alarm unit, and after the identity of the operators is verified and passed, the interlocking control box generates an interlocking activation instruction, and the interlocking activation instruction is synchronously transmitted to the tipper PLC control system through the network communication module to execute equipment locking, is transmitted to the safety interlocking server for recording and is broadcasted to the locomotive vehicle-mounted alarm unit for warning.
6. The apparatus of claim 5, wherein the multi-terminal interactive interface further comprises a mobile alarm terminal carried by an operator for receiving a prompt, alarm or connection request message from the safety interlock server or a locomotive-mounted alarm unit.
7. The apparatus of claim 5, wherein the control unit of the main control desk of the railway vehicle is forced to pop up the interlocking status screen and software shields the operation control related to the empty line equipment after receiving the interlocking activation instruction.
8. The apparatus of claim 1, further comprising an area intrusion monitoring module disposed at an entrance at both ends of the empty line and at an interior critical area for monitoring whether an unauthorized object intrudes during activation of the safety interlock in the empty line operation area and triggering an alarm when intrusion is detected.
9. The apparatus of claim 8, wherein the area intrusion monitoring module is a millimeter wave radar or an AI vision camera.
10. A safety interlocking method for the empty line operators of a railway vehicle dumper is characterized by comprising the following steps of: step S1, an interlocking step before operation, namely before a worker needs to enter an empty line to perform high-risk operation, operating a two-position change-over switch on an interlocking control box to switch the two-position change-over switch from a car turning position to a checking position; s2, the system forced locking and protecting step, namely after the two-position change-over switch is switched to the checking position, triggering the following interlocking actions: S21, cutting off an oil pump driving power supply of the car dumper, and blocking all car dumpers to move through a program of a PLC control system of the car dumper to output instructions; S22, forcedly controlling the empty line protection signal lamp to constantly display red through a program of a PLC control system of the dumper, neglecting the condition of all normal open signals, and forcedly shielding or invalidating signals of the transfer platform in place in the alignment of the empty line; s3, a safe operation step, wherein an operator performs operation in an empty line area triggered to be in forced interlocking; s4, unlocking after operation, namely after operation is completed, switching the two-position change-over switch to a car turning position; s5, a system recovery step of responding to the switching of the two-position change-over switch to the 'turning-over position', recovering normal logic of an oil pump driving power supply path and an action instruction of the car pusher, and recovering normal control logic of an empty car line protection signal lamp and a transfer platform in-place signal.

Description

Safety interlocking device and method for empty line operators of railway vehicle tipper Technical Field The invention relates to a safety interlocking device and a safety interlocking method for an empty line operator of a railway vehicle tipper. Background The dumper unloading standard operation flow comprises the steps of feeding the heavy vehicle into a dumper unloading line, manually completing air exhaust and wind pipe picking operation, pulling the heavy vehicle into a dumper rotor to be positioned by a vehicle pulling machine, overturning the dumper to finish material unloading, feeding the empty vehicle into a transfer platform by the vehicle pulling machine, parallel traversing the empty vehicle to the empty vehicle line by the transfer platform, pushing the empty vehicle out of the transfer platform by the vehicle pulling machine, connecting the empty vehicle with other vehicles in the empty vehicle line, assembling a wind pipe by transfer, and taking the empty vehicle. The car dumper is a system general name and mainly comprises a car shifter, a car dumper rotor, a transfer platform and a car pusher. In the above-mentioned flow, there are two key links that require personnel to enter the empty line operation: (1) The train checking operation of the vehicle, in order to ensure the running safety of the empty vehicle, a train inspector needs to enter an empty vehicle line in a unloading gap to perform safety check on the vehicle door, a vehicle running part (such as wheels and a bogie) and the coupling connection state of the vehicle coupler; (2) And the vehicle air pipe connection operation is that when the empty vehicle is taken, a shunting operator needs to enter the space between vehicles of the empty vehicle line to connect the air pipes so that the locomotive can brake the whole train when pulling the whole train. However, if the car pusher accidentally pushes the vehicle or the locomotive into the empty wire-connected trailer in the process of the operation, the train inspector or the shunting person under or between the vehicles is easily subjected to direct extrusion or impact, which causes fatal personal injury accidents. In order to overcome the safety risk in the operation process, manual management is mainly relied on at present, before a train inspector or a shunting operator enters an empty line, the shunting operator is required to be informed to put a system locking Switch (SK) on an operation table at a locking position (stopping the power supply control of the shunting system), and after the operation is finished, the shunting operator is informed to recover to an unlocking position. This solution presents a serious risk of human manipulation dependence: (1) The misoperation unlocking risk is that because the time for vehicle inspection or air pipe continuous hanging operation is long (usually more than or equal to 0.5 hour), the operation desk locking switch can be inadvertently placed in an unlocking position by other operators (or the same operator temporarily forgets the operation state) to operate other equipment (even if the car puller is not operated) in the links of equipment maintenance, machine test and the like, and if the car puller command is misoperation at the moment, accidents are directly caused; (2) The risk of multi-operator authority conflict is that operators who shift or relief may not know the on-site operation state, unlock without permission and have the risk of misoperation; (3) The risk of negligence in locomotive coupling is that an operator can not effectively inform shunting or locomotive personnel of information of personnel operation on an empty train line due to busy work, unsmooth information communication or simple negligence after locking is completed, or allow the locomotive to drive into the empty train line for coupling operation under the condition that personnel safety evacuation is not confirmed, so that the safety of train personnel under the train is directly endangered. In summary, the prior art relies on manual judgment and operation of operators, and has security holes caused by communication errors, forgetfulness and authority confusion, so that the personal safety of operators entering an empty line cannot be fundamentally ensured, and therefore, improvement is necessary to solve the technical problem. Disclosure of Invention The invention aims at improving the problems existing in the prior art, namely the technical problem to be solved by the invention is to provide a safety interlocking device and a safety interlocking method for empty line operators of a railway vehicle tipper. In order to achieve the aim, the technical scheme adopted by the invention is that the safety interlocking device for the empty line operation personnel of the railway vehicle tipper comprises a tipper PLC control system, a tipper locking loop, a tipper variable frequency oil pump driving power loop, an empty line protection signal forced loop and a tra