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common problem

Release time: 10:51, March 23, 2020

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The development process of the electronic control system of mine winch should be towards the new equipment of unmanned, network, remote control and full automation. Frequency conversion is necessary for ore construction Mine winch It is necessary to ensure the perfection of its electric control equipment, realize the numerical control and intelligent control of the mine, and output high production resources while ensuring the operation of × ×, so as to lay a good foundation for the new digital mine in the future. The characteristics of mine frequency conversion electric control are as follows:

1. The console uses FX2N PLC as the main control equipment. It is designed and manufactured in accordance with the EMC standard of GB / T17626.

2. Because the control system is controlled by PLC, the locking control of main belt conveyor and front and rear equipment can be easily realized.

3. The master control station detects the conveyor speed in real time, controls the zero speed braking and automatic braking of the conveyor to avoid the conveyor rolling, inverter and motor over-current.

4. The frequency converter is used to complete the motor start-up and speed regulation requirements of the belt conveyor, and the belt conveyor is in a long-term low-speed operation state (such as transport vehicle, rope detection, belt inspection), which has obvious energy-saving effect.

5. Through the network platform, the frequency converter can realize the automatic data exchange, has the function of automatic adjustment of operating parameters, and has good dynamic follow-up of master and slave motors to ensure the power balance of multiple motors.

6. The system has comprehensive fault monitoring and reliable fault alarm protection. With over-voltage, over-current, under voltage, short-circuit, grounding, overheating and other protection functions.

7. It has the function of low speed tape detection. The tape speed can be adjusted from 0.2 M / s to VE.

   Mine haulage and other mine haulage angle is less than 30 degrees for mine and other auxiliary working angle. The motor provides drum torque through the reducer, the steel wire rope is wound with a reel, and the brake device controls the operation and stops to meet the dispatching and processing purposes.

The specific analysis of mine winch skew winch non guarantee behavior is as follows:

1. Overload winch transport overload. The winch needs to be familiar with the performance of the winch, especially the large static tension of the elevator, and estimate the pulling force generated by various vehicles entering the rope track. In particular, it is not allowed to blindly contact materials that are not frequently transported. It is necessary to make it clear that managers should be cautious and prefer to pay less. If the overload material is overloaded, it may lead to insufficient braking torque, resulting in rope breakage or sports car accident.

2. In order to save energy, illegal truck will cause friction damage to extrusion or mine resistance in skip transportation. Hook workers should immediately stop such violations and send stop and stop signals to the winch driver immediately.

3. The winch is operated by unauthorized personnel. As the winch driver on duty cannot go to work after shift or other reasons, the team leader does not arrange the work obviously, and the driver of the vehicle is not arranged in the transportation operation. As a result, such violations may occur during underground transportation operations and may be started illegally by unauthorized persons. Such illegal acts can have serious consequences. Unauthorized personnel are not familiar with the performance of the winch. In an emergency, they can't handle it properly. If the operation site of inclined lane transportation is in hidden danger state, accidents may occur.

Winch violation of parking fee or other operation. On the ground, the winch was illegally parked in the middle of the winch. The staff put the steel beam on the material truck. The top winch is unattended. Nylon rope is used to connect the brake handle to the road to help with the wire mesh. This is a serious violation. Especially in the case of new employees, the head teacher is not careful, not serious, does not explain the precautions in the operation process. In order to save labor, the operator is very laborious. The winch also has an illegal parking lot. One ton tramcar is equipped with concrete. The operator uses concrete from the tramcar to harden the sloping lane. Winch parking violation may lead to sports car and rope fracture, resulting in personal injury and death.

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