ZPD-7 roadway spray 
 What is the purpose of the roadway spray? 
 The roadway Spray is an improvement and governance coal surface and underground main transport belt roadway and face back to the wind tunnel and the bottom, parking lots and other places operating environment to effectively prevent the preferred device of the dust hazard. Used to drop the smoke and dust, reducing the concentration of methane, carbon monoxide and other harmful gases. 
 Characteristics Lane spray: 
 The main control box controlled by computer, the device name, type, function, spray delay time, the main control system and sensors, electric ball valve status are displayed on the LCD screen. There are two DIP switches, the main control system for the feature set and time delay settings, the main controller to use a microcontroller programmed control; according to user needs and the actual situation, the associated equipment, the ingenious combination of a variety of functions. Typical functions are as follows: 
 Roadway spray, Lane spray body induction Minting. Under normal circumstances, the device is often sprayed, when someone through device Minting people through the device to continue spraying water (configuration master box, 2 sets of the thermoluminescence control sensor, electric ball valve 1). 
 Timing roadway spray, the use of microcomputer control switch on the spray time setting, to achieve a certain date, the spray of a period of time and man Minting, people continue to spray after functional 
 (1 to configure the master box, electric ball, thermoluminescence light control sensor). 
 Double water curtain spray of roadway, roadway parallel double water curtain blocking dust suppression function (configuration 1 of the master box, electric ball, the thermoluminescence control sensor 4). 
 Roadway spray the main technical parameters 
 A main control box power supply rated voltage: 127VAC 
 2, the action of electric ball valves rated voltage: 15VDC 
 3, the main control box intrinsically safe output voltage: 12VDC 
 4, the master box intrinsically safe output current: 470mA 
 5, the highest output of the safety of the main control box open circuit voltage: 12V/310mA; 15V/256mA 
 6, the sensor work rated voltage: 12VDC 
 7, the sensor output signal: 
 3V/DC ≤ high ≤ 12VDC; 0V/DC ≤ low ≤ 1VDC,, 
 8, the unit main control box signal input: high ≥ 6.0V, low ≤ 0.5V 
 9, action, control time: 5s 1200s adjustable, the error is ± 2s 
 10, applicable to water pressure: 0.2 ~ 7.0MPa