Jinan Dongshan Mine Equipment Company (0531--89004695) coal production without pressure damper mine one automatic non-pressure damper, throttle manually without pressure, without pressure damper automatic electric, pneumatic automatic non-pressure damper, waterproof fire closed doors, anti-shock-proof doors, valves, dampers and other underground mine throttle. Our quality products both in hardware or in the service of soft power are better, be anxious customers, customers would like to think, always put the interests of its clients first. Mine works without pressure damper ------- automatic throttle control system automatically switches the infrared radio control with infrared sensors mounted on opposite sides of the wall. When a person or vehicle passes a trigger signal to open the door, the system first determines opposite throttle state, if in a closed place (and vice versa, does not respond), then open the throttle, language speakers prompted warnings and with flashing red light when another road damper tips "Front damper opens, pay attention to safety," and lock the door to prevent the two throttle open simultaneously. After the throttle open, judging by the door open throttle position sensors in place, then delay closing or closed by buttons. When the process of closing open signal is detected again, pinch car sensor signal, sensor signals and other signals pinch people immediately start procedures to open the door, close the door again delay timer, to avoid people, the accident occurred after the vehicle throttle process. Dampers are installed on both sides of every door with a manual switch button, pedestrians into the roadway from either party, press the button to open the door, after the adoption, according to the other side of the button to close the door. If the infrared faulty switch on the radio, can be achieved by manual button switch door. At the same time, the manual button has quickly realized the door switch function, especially for pedestrians frequent the damper. Automatic throttle system with multiple protection mechanisms, a relatively high level of security and stability. First, people with a pinch, pinch car features. Fangga button is mounted on the door, if the closing process by the touch pinch pedestrians who push button, open the throttle quickly to avoid squeezing. Pinch cart feature is the infrared sensor mounted on both sides of each door, such as when a vehicle by closing the door immediately to avoid a vehicle collision doors, accident. Secondly, the throttle switch by hydraulic pusher (or cylinder pushrod) to realize, having a latch function. When a door is opened, the other door lock, preventing the two throttle open simultaneously, causing a short circuit romantic. When the damper is closed when in place, hydraulic valves (valves) have packing function to prevent direct open throttle. The event of power outages and other incidents, open pressure relief valve, direct open throttle. Fourth, the main characteristics compared with conventional throttle, product safety, stability, reliability, functional diversity, ease of operation, etc., to achieve a larger increase, main features are as follows: 1) throttle switch is by driving device (such as a hydraulic cylinder, gear, cylinders, etc.) to achieve. Plus other facilities do not need the drive unit is mounted on the door, do not take up space on the roadway, installation is simple, open and close smoothly, thereby achieving a set of safety, convenience and the automatic functions all in one. Especially the use of throttle hydraulic transmission, greater thrust to meet the needs of large-size heavy throttle control. 2) In automatic control status, throttle run automatically, without human open, convenient and practical. 3) PLC control, to achieve the overall automatic control damper effectively reduce labor intensity, enhanced security functions, improve work efficiency 4) two throttle lock each other, only to open up a the same time, and closed a priority, to avoid short-circuiting the ventilation system run. 5) can be achieved when the power of artificial throttle switch, the device automatically resets after power is restored (if at this time the throttle is turned on, the system will automatically close the damper). 6) has a LED display alarm and voice alarm two alarm mode, you can issue a variety of voice prompts signals a fault condition can be audible and visual alarm signal. There pinch people, anti-trap car means improving the system operation security. 7) System control and data communications: the main control system using programmable controller (PLC), it has a communication interface RS485. 8) electronic control system has over-current, overload, overvoltage, phase imbalance, leakage and other protection. Advantages fully automatic pressure damper ---- Mine automatic throttle without pressure to break the structure of the traditional form of the throttle, the pressure acting on the damper structure by balancing into a kind of internal forces, showing its unique structure; throttle using heavier steel welded, good resistance to deformation effect; Mining PLC programming, manual electric one, the soft seal, abrasion resistance is eight times that of ordinary rubber, may be greater than 90 degrees opening angle: beautiful appearance, easy installation to maintenance . Jinan Dongshan Mine Equipment Co. Customer satisfaction hundred percent of what our eternal pursuit! Phone 0531--89004695 15628887522 http://www.jndongshan.com