Programmable logic controller (PLC)-controlled electric safety door

Abstract

The invention relates to a programmable logic controller (PLC)-controlled electric safety door. The PLC-controlled electric safety door comprises a door frame, a door body, an electromotor (9) and a pulling rope driving wheel (11), wherein the electromotor (9) is arranged on an upper beam (2); the pulling rope driving wheel is wound with a pulling rope (6); one end of the pulling rope (6) rounds a second guide wheel (8') arranged on one side of the upper beam (2) and is connected to a counterweight block (7), while the other end rounds a first guide wheel (8) arranged on the other side, passes through one side of the door body downwards, extends to the bottom of the door body, extends to the other side of the door body along the bottom of the door body, then passes through the door body upwards, rounds the second guide wheel (8') and is fixed to the counterweight block (7); and the positive and negative rotations of the electromotor (9) are controlled by a control circuit of a programmable controller. The electric safety door is driven by the PLC-controlled electromotor, so that the electric safety door has the advantages of stable and precise switch operation, reliable working, low failure rate and effectively ensured safety of hoisting operation of coal mine vertical shafts.

Description

technical field [0001] The invention relates to an electric safety door, in particular to a PLC-controlled electric safety door. Background technique [0002] Coal mine shaft lifting cage is an important equipment for transporting mine personnel, materials and equipment, etc. Safety doors are generally installed at the entrance and exit of the lifting cage to prevent personnel, vehicles, etc. from falling into the shaft by mistake. Therefore, the safety door is an important device for coal mine shafts. [0003] At present, the opening and closing methods of the wellhead and bottom safety doors of domestic coal mine shafts include manual manual operation, cage-driven vertical lifting, hydraulic drive and pneumatic control. Among them, the safety doors of most coal mine shafts are manually operated, and some newly built mines are mostly driven by hydraulic cylinders. But these types of electric safety gates all have their own defects, which are unfavorable for the safe produ...

AI Technical Summary

Problems solved by technology

However, these types of electric safety gates have their own defects, which are not conducive to the safe production of mines.

[0004] For example, manual hand-operated safety gates require manual operation, which affects work efficiency and is prone to failure

As another example, the original design of the traffic cage safety door of Shenhua Yili Huangyuchuan Coal Mine's auxiliary shaft uses a hydraulic cylinder to drive the safety door switch. It will affect the normal operation of the cage operating system

[0005] At the same time, most of these safety doors require operators to operate, and cannot be precisely controlled or remotely controlled according to the operation of the cage, which greatly affects work efficiency during use, and the work is unstable and reliable

Images