Non-pressure underground mine throttle damper manufacturers without pressure damper in coal mine ventilation system, the damper is a common ventilation facilities, plays a very important role in the coal mine safety production. No pressure damper works: no pressure damper for coal mine roadway wherever required install dampers. Non-pressure damper adopts pressure balance principle, every double-leaf steel door damper is different to the synchronous switching, the use of the link mechanism to balance the pressures acting on the throttle through the link into an internal force balance mechanism and be balanced to ensure that When the throttle opening effort, convenient and flexible. Since balanced pressure to open and close the damper is different, so regardless of the airflow direction, the two doors were thrust by both romantic and romantic pressure, and the same size. Also on the throttle opening direction of the door beam opposite side, weld baffles ensure airflow reversed throttle is not blown open. At the same time generated by the counterweight traction achieve damper automatically closes. Throttle gate structure: The throttle is sub-structure, combination in the underground installation. Mainly by the doors, door frames, balance mechanism, hinge, weight etc; frame using steel welding, bolting components. Doors made of steel welded skeleton-type material, Paver steel plate; intermediate filling material; aluminum fire cotton, balancing mechanism bolted on the door, so different to the two doors open simultaneously, through the automatic throttle proportion on or off. Door structure and material: a steel throttle damper, double-leaf off, a total of two throttle in every door leaving in a pedestrian wicket specifications for 680mm × 1680mm, small door automatically closed, lockable and can open on both sides, front and back, each with a small door number one. Wicket to set up a viewing window, the size of the circular 300mm * 300mm. Door body is mainly composed of frames, doors and other parts of the counterweight, frame doors with steel welded structure; leaf structure uses 100 * 50 * 4mm rectangular pipe welding (keel structure), two-door is welded 2mm steel, door thickness of 54mm; frame uses no less than 120 × 120 × 10mm, between the doors and door frames sealed pads, good sealing performance; throttle observation window 10mm thick plexiglass. Throttle advantages: 1, throttle opening force respect, no pressure damper damper Since each group composed by the two fan small damper, in which the opening and closing the damper when 一扇 regardless of the direction of opening and closing, another fan door to open and close different, then release pressure, easily opened and closed, the force is independent of pressure magnitude and direction; and the old throttle heavy doors, in the case of large negative roadway is difficult to open, take 4 or 5 people at a time before the opening. 2, each with two sets of non-pressure damper damper composed of two-way separated the wind, no longer need to set up reverse throttle; the old tunnel due to the impact of negative pressure throttle must install anti-throttle for use when Merry backward, each There are both positive and negative two throttle flap composed by two sets of four. 3, no pressure damper double sealed, air leakage is small; sometimes in order to reduce the old throttle opening pressure, will install a small damper on top of the damper, which increases the amount of air leakage damper. 4, no pressure damper system is simple, durable, will not be damaged during the opening flap; old throttle because it is difficult to pry open people often use heavy, throttle plate is easy to damage the damper. 5, the pressure balance principle used in non-pressure damper closed stable, safe and reliable; no pressure damper damper in each two doors have large cross-sectional area than the old-fashioned open a single door open damper area, easy pedestrian traffic through the material, is not easy collision damper, throttle and older due to difficult to open the throttle pressure is likely to cause pinch pedestrian accident, safety performance than non-pressure damper hearing. 6, no pressure damper entire material of iron products made fire performance is good, can effectively block the fire lane transportation belt may occur and prevent fires and other harmful gases into the roadway, corrosion, moisture-proof performance is good, and the strength, easily deformed; old throttle-by-side wooden door dioica made poor corrosion, moisture resistant, prolonged use of perishable and need replacing. 7, no pressure damper in the hammer action can be achieved between two damper interlocked, easy to cause a short circuit romantic problems. No pressure no pressure damper damper mining without manual pressure no pressure damper damper Mine pneumatic automatic throttle without pressure without pressure throttle without pressure no pressure damper damper mining factory no pressure no pressure damper damper manufacturers manufacturers Shandong coal mine coal mining machine Inclined Wells St. Explosion-proof doors for my company direct marketing products, quality and cheap, is your good choice, in order to maximize the benefits of your choice holy Mine machine! Holy Mountain Machinery Co., Ltd. Shandong coal mine annual production of waterproof airtight doors, fire gates, anti-shock doors Inclined wells blast doors, blast doors refuge chamber, anti-sudden throttle, throttle and other non-pressure mine gate, buffer Bed and buffer strips, concrete sleepers, corrosion sleepers, various mine support equipment with Shandong's coal waiting for your advice