The belt conveyor is to insure the safe operation of power plant. In order to insure the normal operation of power plant belt conveyor, reasonable design and operation of the belt conveyor device is very important, and also can reduce the degree of harm to personal accident, improving the normal use of power plant belt conveyor.

With the increase of conveying capacity of belt conveyor, the conveying distance of single machine is longer and the speed is increased, and the safety and reliability of its operation are more and more demanding. The normal operation of power plant belt conveyor, in addition to the quality of the main components, the safe operation of belt conveyor is also a link that can not be ignored. It can reduce the harm of accidents to people and equipment.Mainly used in the design of coal handling system of thermal power plant belt conveyor safety protection device: two level deviation switch, two-way pull switch, longitudinal tear protection device, slip detection speed display device, chute protection device, material flow detector, a detector etc.. It is an important guarantee for the safe operation of coal transportation system to reasonably select the type of protective devices and arrange them.

In the course of running, the power plant belt conveyor of two grade deviation switch often deviates from the belt. In order to prevent this phenomenon, the self-aligning roller belt conveyor, along the length of every 10 groups arranged around a group of rollers, the measure is to a certain extent preventing side effects, but also can not completely eliminate the phenomenon of deviation. In order to prevent the belt conveyor from accidents due to deviation, the general needs to add a two grade deviation switch, usually double cam structure, with vertical roller automatic reset function. The utility model sends out signals through detecting the running state of the conveyor belt, and realizes the automatic alarm and the stopping function of the belt conveyor deviation.

The bidirectional rope pulling switch is mainly used for conveying material in time to prevent and deal with the accidents of personal equipment. The rotary cam structure is adopted, and the swing rod can rotate the money. When an emergency occurs, pulling the rope switch at any place along the site may send a stop signal. Two way rope pulling switch has two kinds of automatic reset and manual reset. When the switch sends out the stop signal, the pendulum rod automatically restores to the position before the operation. After the failure is eliminated, the pendulum can be thrown into normal operation immediately. The manual reset type, when the switch sends a stop signal after the switch, automatic locking, and the warning signs show this switch is in working condition, can make the site management to accurately identify different installation position of the switch is action, convenient on-site management personnel to timely treatment, accident treatment, restore to the original state of manual switch. The bidirectional rope pulling switch is arranged along the middle frame of the belt conveyor, and is arranged on the side or the bilateral side of the belt conveyor through the running passage. The spacing between the two rope switches is at 50-80m. When using a steel wire rope as a pulling rope, the spacing of the rope should be limited to 3m so as to avoid the rope hanging. When the rope of nylon rope is used, the spacing of the fixed rope pull ring should be limited to 4-5m. Installation should also pay attention to the left and right sides of the pull rope switch to install a fixed direction pull ring.