The belt conveyor protection device, the mining belt conveyor protection device 

 I. Introduction 

 Mining belt conveyor protection instrument is designed according to the requirements of the Ministry of Coal on improving the underground belt conveyor to protect the file, and underground field surveys and testing, the existing belt conveyor protection device has been optimized and improved, using a highly reliable new intelligent microcontroller at the same time listen to a lot of user feedback, this product intelligence, reliability, advanced and easy to operate compared with similar products have been greatly improved. 

 Second, the main technical parameters: 

 1, host Flameproof Type: mining flameproof and intrinsically safe. 
 Intrinsically safe, flag: ibI, (150 ° C), a variety of sensors for mine. 
 3, the electrical parameters: 
 a rated input voltage: AC127V or 36V; 
 b, voltage allows fluctuations: 75% -110%; 
 c, the safety output open-circuit voltage: DC12V; 
 d, intrinsically safe output short-circuit current: DC4mA; overcurrent protection setting value 1.2A; 
 e, intrinsically safe output external to allow the distributed capacitance: 0.1PF/KM; 
 f, intrinsically safe output external to allow distribution inductance: 1mh/KM the; 
 g, the proof mark the: Exdibl (150 ° C); 
 h, the capacity of the relay output node: AC36V/5A; 
 i, speed, temperature, smoke sensors are active devices, the rated voltage of 12 V, quiescent current less than 180mA, the maximum operating current less than 220mA; remaining sensor is a passive device, the action current less than 5mA (including coal, deviation, emergency stop, tear with sensor); 
 j, centralized control signal is less than 12V, 0.5mA; 
 k, speakers, working voltage: 12V, current 30mA, the output power is less than 2W; 
 l of each sensor connection is not more than 1000 m, the control line is not more than 1000 meters, the distributed capacitance is less than 0.1PF distributed inductance is less than 1mH; 
 m the combination parameters: 12V430mA,. (Smoke sensor, speed sensor, temperature sensor); 
 n, intrinsically safe circuits the maximum short-circuit current: 4mA; 
 o The product Dimensions: 320 × 120 × 330; weighing less than 15KG; 
 p, centralized console: 8. 
 Third, functional and technical features 

 This product has a centralized control and stand-alone control in two ways. Chain function, centralized control, one of several shut down its coal supply belt machine downtime; against the coal flow delay the order from the cart functionality, the delay time of 10 seconds ± 5 seconds. This product as a centralized control over eight. Under manual control, the sensors can be connected with OFF delay the order from the parking along the coal flow. 

 Centralized control mode or manual mode, this product are from the vehicle delay function, language, alarm, fault stop protection function to protect the display, fault, voice alarm, fault self-locking function, system status in the county on the digital display function, a full range of contact and intercom functions. 

 Various functions and protection characteristics as follows: 
 A centralized control function: 
 (1), normal from the car: When the Monitor online and placed in a centralized control, (first set manually), the first (or front) can control the next time delay from the car, the delay time 10S ± 5S, delay during the early warning function; a full range of system status indication on the digital display start and stop state of the Monitor. 
 (2), normal shutdown: When more than one monitor for online and placed in centralized control, (first set to manual mode), first (or front) parking, the next sets of interlocking parking, parking 12 seconds delay. At the same time, the fault Parking in that the voice alarm signal sent to the full range of fault; a full range of system state is only against the bits of each station from the stop display. Monitor trouble parking in a failed self-locking state. Only after the failure to lift (press the stop button of the failure of a single station), the fault stop the belt before the signal back from the car to accept from the car. 

 2, a single control and protection: 
 This product manual work: as a single use, from the car and stopping by the table panel from the car and the stop button control without a control. The same time, centralized control from the car and parking next to (the next set of centralized control work). 

 3, various protection functions: 
 Speed ??protection: (1), when the belt conveyor is running, the driven roller security will not be diverted for more than 5-10S, the low-speed fault alarm signal delay remain about 2S + 1S. 
 (2) the protection of the pile of coal: coal sensor guide 45 ° ± 5 ° deviation from the centerline, the delay of 13 seconds, the fault protection Parking. 
 (3), deviation protection: When the deviation sensor guide deviates from the centerline of 15 ° ± 5 °, the delay 10S ± 5S deviation fault protection. 
 (4), smoke protection: When the smog, smoke sensor of this signal is sent to the host, and immediately smoke protection. 
 (5), temperature protection: When the temperature exceeds the temperature sensor monitoring points set temperature (+80 ° C), the immediate temperature fault protection. 
 (6), along the emergency stop protection: This product is realized immediately stop protection function along a emergency stop switch is connected. 
 (7), with a tear protection: When the conveyor belt tear, tear with the sensor to the electrical signal to the host, the host realized immediately stop protection. (Tear with sensors are user selectable, and an additional fee). 
 Various failures in this instrument have corresponding instructions, while a voice alarm. Protection in the fault self-locking state, and issue the appropriate voice alarm sound. 

 4, each host can be achieved through hand-held microphone, half-duplex intercom, and contact RBI signals.