System for automatically controlling order of cage passengers of vertical shaft cage based on PLC (Programmable Logic Controller)

Abstract

According to the system for automatically controlling the order of the cage passengers of the vertical shaft cage based on the PLC, the isolation fence is arranged in front of the cage, the entrance and the exit are separated, the collected number of the cage passengers is counted through the PLC, and the entrance is closed through the PLC so that the problem of over-riding can be prevented. By improving the tank waiting area, the flow direction of tank passengers and the flow direction of tank unloading personnel are separated, the order of the tank waiting area is well controlled, the number of the tank passengers is controlled in a counting mode, and potential safety hazards can be greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of cage, and specifically relates to a system for automatically controlling the order of passengers taking the shaft cage based on PLC. Background Technique

[0002] The cage, as an important link connecting the deep part of the mine with the ground, bears the heavy responsibility of transporting miners, equipment, minerals, etc. up and down. Its position in the mine production system is crucial. The design precision and operation efficiency of this vertical transportation system not only directly affect the daily output and economic benefits of the mine, but also directly guarantee the safety of miners' lives. However, in some large or high-yield mines, during the peak commuting hours every day, the carrying capacity of the cage faces huge challenges. Overcrowding not only reduces the transportation efficiency, prolongs the waiting time of miners, but also greatly increases the potential safety hazards. Overcrowding may cause the cage to be overloaded, affecting its balance and stability, and increasing the risk of accidents; at the same time, it is difficult to evacuate personnel in case of emergency, which will further exacerbate the severity of the accident consequences. Content of the Utility Model

[0003] In view of the safety hazards such as disorderly passengers taking the cage at the shaft headgate, squeezing into the cage, and overloading, the utility model provides an intelligent automatic control system for the flow direction and flow rate of passengers taking the shaft headgate cage based on PLC, so as to manage the order of passengers taking the shaft headgate cage.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A system for automatically controlling the order of passengers taking the shaft cage based on PLC includes a first-layer cage, a second-layer cage, a second-layer platform, and a cage curtain door. An isolation fence is arranged in the waiting area for the cage. The isolation fence is provided with an entrance and an exit, and gate fences are respectively arranged at the entrance and the exit. The gate fences are driven to rotate by motors; the motors are connected to a control box and are controlled by a PLC controller.

[0006] The system is also provided with a display screen and a loudspeaker. The display screen is arranged on the railing of the second-layer platform; the display screen and the loudspeaker are connected to the PLC controller and are controlled by the PLC controller.

[0007] The system is also provided with a photoelectric sensor. The photoelectric sensor is arranged on the passage at the entrance and is used for counting the number of people entering.

[0008] The exit is closer to the cage door, and the entrance is farther from the cage door.

[0009] The beneficial effects obtained by the present utility model are as follows: Since isolation fences and display screens are added in the shaft waiting cage area, the isolation fence is provided with an inlet / outlet and a railing gate. The opening and closing of the railing gate are controlled by the forward and reverse rotation of the motor, and the forward and reverse rotation of the motor is controlled by the PLC controller in the control box. The PLC controller receives signals from the hoist and the optoelectronic switch, and controls the motor and the display screen, so as to achieve the effect of intelligent automatic control of the order of passengers entering and leaving the cage, and increase the safety factor of the passengers taking the cage. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of a system for automatically controlling the order of passengers taking the shaft cage based on PLC of the present utility model.

[0011] Figure 2 is a schematic structural diagram before transformation.

[0012] Figure 3 is a schematic structural diagram of the isolation fence.

[0013] Figure 4 is a schematic diagram of the display screen position.

[0014] Figure 5 is a schematic structural diagram of the interior of the control box.

[0015] Figure 6 is the TIA Portal programming ladder diagram of the outlet motor.

[0016] Figure 7 is the schematic circuit framework diagram of the present utility model.

[0017] Figure 8 is a schematic structural diagram of the column and the railing gate.

[0018] Figure 9 is a schematic structural diagram of the shaft hole and the hinge shaft.

[0019] Figure 10 is the TIA Portal programming ladder diagram of the PLC controlling the display screen.

[0020] In the figure, the markings are: two - layer cage 1, one - layer cage 2, tank curtain door 3, isolation fence 4, control box 5, second - layer platform 6, display screen 7, horn 8, outlet motor 9, outlet railing gate 10, inlet railing gate 11, inlet motor 12, optoelectronic switch 13, switching power supply 14, busbar 15, relay 16, wire duct 17, PLC controller 18, circuit breaker 19, upper hinge 20, lower hinge 21, column 22, hinge shaft 23, shaft hole 24. SPECIFIC EMBODIMENTS

[0021] The present utility model will be described below with reference to the accompanying drawings.

[0022] As Figure 2, the cage used is a double-deck cage. The area inside the cage is 4×1.4㎡, and the maximum number of passengers per layer is 25. There is a dedicated person inside the cage responsible for sending the cage operation signal. The cage curtain door and the hoist form a safety interlock, that is, the hoist can only start and run when the cage curtain door is closed, and the hoist cannot start when it is open. Before the transformation, there was no fence partition in the cage waiting area at the shaft headgate. When people were waiting for the cage and entering and leaving the cage, the order could not be maintained, and phenomena such as overcrowding and overloading often occurred during the peak commuting hours, posing potential safety hazards.

[0023] Such as Figure 1 , install an isolation fence 4 and a display screen 7 (with digital display and broadcasting functions) in the cage waiting area at the shaft headgate to manage the order of people waiting for and leaving the cage, and prevent phenomena such as disorderly entry, overcrowding, and overloading of cage passengers. To prevent the intersection of people leaving and waiting for the cage, when setting, the exit is relatively close to the cage, and the entrance is relatively far from the cage. Through distance control and time-sharing control of the exit fence gate 10 and the entrance fence gate 11, it is possible to effectively control the people leaving the cage to leave first.

[0024] The structure of a system for automatically controlling the order of cage passengers based on PLC in a shaft includes two parts: external hardware and a control box 5. Among them, the external hardware includes: an isolation fence 4 and a display screen 7. The isolation fence is set with: an entrance fence gate 11, an exit fence gate 10, an entrance motor 12, an exit motor 9, and an optoelectronic switch 13, whose function is to control the flow of people in and out. The display screen 7 is installed at the railing of the second-floor platform and has an instant digital display and broadcasting function, whose function is to control the flow of people in and out.

[0025] The control box 5 includes: a circuit breaker 19, a switching power supply 14, a busbar 15, a PLC controller 18, a relay 16, and a wiring slot 17. Among them, the switching power supply provides DC 24V and ±5V voltages to supply power to the PLC controller and other circuits. The PLC controller 18 selected is a Siemens controller (S7-1200 CPU). The external power supply is connected to the circuit breaker 19, and the circuit breaker 19 supplies power to the switching power supply 14. The switching power supply 14 supplies power to the PLC controller 18. The PLC controller collects the technical results of the optoelectronic switch, controls the inlet motor 12 and the outlet motor 13 according to the specified program, and displays the collected counting results on the display screen 7. When the counting result reaches the limit number of people, the PLC controller 18 alarms through a speaker 8.

[0026] The structures of the exit fence gate 10 and the entrance fence gate 11 are similar and are connected in the following way: the lower hinge 21 is fixed on the column 22, the upper hinge 20 is fixed on the fence door frame, the housing of the motor is fixed on the column 22, the rotating shaft of the motor is connected to the hinge shaft 23 through the shaft hole 24, and the rotation of the motor shaft drives the upper hinge and the fence door to rotate. The forward and reverse rotation of the motor controls the opening and closing of the fence door.

[0027] As shown Figure 6 below, the working principle of PLC control is as follows:

[0028] (1) Door opening: When the cage reaches the stop point, it triggers I0.0. I0.0 triggers the "generate pulse" instruction DB1. The pulse instruction outputs a 3S signal to Q0.0. Q0.0 controls the forward rotation of the outlet motor for 3S through a relay, and the outlet gate opens;

[0029] (2) Door closing: When the cage leaves the stop point, it triggers I0.1 or after the "outlet door opening" (Q0.0) runs for 30S, it triggers the "generate pulse" instruction DB2. The pulse instruction outputs a 3S signal to Q0.1. Q0.1 controls the reverse rotation of the outlet motor for 3S through a relay, and the outlet gate closes.

[0030] System working principle and operation logic:

[0031] When personnel enter the waiting area through the inlet aisle, it triggers the photoelectric switch. The photoelectric switch triggers I0.2, and the counter DB3 starts counting. The value is placed in the variable "real-time number of people" MW10. When MW10 is equal to 25, Q0.4 is output. Q0.4 controls the display screen through a relay for the first alarm. When MW10 is equal to 50, Q0.5 is output. Q0.5 controls the display screen through a relay for the second alarm. When the counter is triggered by the "full alarm" or "cage out-of-position" digital quantity, the counter DB3 is cleared or reset.

Claims

1. An automatic control system for the order of passengers taking the shaft cage based on PLC, comprising a first - layer cage, a second - layer cage, a second - layer platform and a cage curtain door, characterized in that: There is an isolation fence in the waiting tank area. The isolation fence is provided with an entrance and an exit, and gate barriers are respectively arranged at the entrance and the exit. The gate barriers are driven by motors to rotate; the motors are connected to a control box and controlled by a PLC controller.

2. The system for automatically controlling the order of personnel taking the shaft cage based on PLC according to claim 1, wherein: The system is also provided with a display screen and a speaker. The display screen is arranged on the railing of the second-floor platform; the display screen and the speaker are connected to the PLC controller and controlled by the PLC controller.

3. The system for automatically controlling the order of personnel taking the shaft cage based on PLC according to claim 1, wherein: The system is also provided with a photoelectric sensor. The photoelectric sensor is arranged on the passage of the entrance and is used for counting the number of people entering.

4. The system for automatically controlling the order of personnel taking the shaft cage based on PLC according to claim 1, wherein: The exit is closer to the cage door, and the entrance is farther from the cage door.

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