(1) LED indication with working status and fault type. (2) It can issue early warning signals before starting the car, and some also have language warning and language accident alarm functions. (3) It can be used in a single machine, and can realize a transportation system composed of a plurality of belt conveyors, and can realize communication when collecting control. (4) Each station can display its position in the centralized control during the centralized control. Some of the successful use of the dual audio transmission technology makes the alignment of the transportation system running state relatively intuitive, making the operator easy to observe. (5) It can realize various protection functions of the belt conveyor, and various protection sensors operate with fault type indication and alarm or language alarm. The sensor input signals are all active low; the action type can be divided into immediate shutdown and delayed shutdown after protection. The various protection characteristics are as follows: 1 Slip protection: The speed sensor is usually used. When the belt conveyor is running, when the contact between the drive roller and the conveyor belt is relatively displaced and lasts for more than 2 s, the protection will be delayed. â‘¡ smoke protection: use more gas-sensitive sensors, gas sensors using rubber, sensitive to the coal combustion smoke characteristics, when the belt or other non-metallic material or a fuel superheater smoke, the output current using the sensing element Change to detect smoke and stop immediately after protection. 3 Temperature protection: When the belt conveyor is running, if the drum or other driving equipment generates excessive temperature due to friction or other unknown reasons, the temperature of the sensor is higher than the preset value by sensing the temperature of the measured object. Immediately after the shutdown, at the same time, drive the sprinkler device, spray water to cool down. 4 Coal protection: When the unloading point coal accumulates or the chute is blocked, the coal level exceeds the predetermined position and lasts for a certain period of time, and the time delay after the protection is realized. The sensor adopts two methods: First, the coal level switch type, when the coal level rises When the sensor is tilted to a certain angle, the internal stroke switch action is protected; secondly, the electrode type coal position probe is used to realize the protection by using the coal resistance change between the probe and the coal pile. 5 Deviation protection: The sensor is usually used in two pairs of tapes, which are installed on the head, body and tail of the belt conveyor, which are easy to run off; when the conveyor belt of the belt conveyor runs beyond the edge of the roller 20mm The guide rod of the sensor is deviated from a certain angle for a certain period of time, and the protection is delayed after a delay. 6 Emergency stop protection along the line: use two-way rope switch, along the pedestrian side of the belt conveyor, set one at intervals of about 50m from the head. During the operation, when the conveyor is faulty, the operator pulls Pull the rope switch to stop immediately after protection. 7 Longitudinal tear protection: generally used to monitor the longitudinal tear of the loading point tape. The sensor is usually installed between the upper and lower tapes above the loading point. When the tape is longitudinally torn, the coal leaks from the crack to the sensor under the tape, when the coal When the stack reaches a certain weight, it will stop immediately after protection. Lysozyme Enzyme,Enzyme for Food,Liquid Acid Cellulase,Glycoside Enzymes Sunson Industry Group Co., Ltd , https://www.sunsonchinaenzymes.com
Application Analysis of Belt Conveyor Comprehensive Protection Device
Existing coal mine belt conveyor integrated protection device to be supporting different types of protection sensors together constitute a control system. Due to the different technologies adopted by various manufacturers, their performances are different from each other. The control principle is mostly composed of hard-wire logic circuits, operational amplifiers, CMOS integrated circuits, and single-chip microcomputers composed of relays. All control and sensor signals are input into the control box for analysis. Judging and issuing instructions to control various equipments to ensure the safe operation of the belt conveyor. Usually has the following performance characteristics: