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1、风门气动减压装置的应用解析风门气动减压装置的应用解析摘 要：井下风门在通风负压的作用下能够自动关闭，对于负压大的地点，风门关闭迅速，力量大，容易挤伤通行人员。因此，我们设计一种能够减少负压作用力的装置安装在风门门轴一侧，当风门关闭时，此减压装置起到缓慢关闭风门的作用。Pick to: mine air door in under the action of negative pressure ventilation can automatically shut down, for the location of the negative pressure big, air door close
2、d quickly, strength, easy against traffic. Therefore, we design a device that can reduce the negative forces mounted on the throttle shaft side of the door, when the throttle is closed, the pressure-relief devices have the effect of slow close the damper.关键词：井下风门；通风负压；作用Key words: downhole throttle;
3、 Negative pressure ventilation; role一、风门气动减压装置工作原理：通过空气的压缩和弹簧的缓冲作用起到减压的目的。当风门开启时减压装置通过尾部弹簧将轴杆弹起，在弹起的过程中通过尾部两个进气孔进气，一大一小，大孔作为主要出气孔。风门关闭时，风门被轴杆顶住，通过轴套腔内的压缩空气缓慢出气。主要原理就是其中的主出气孔上面设置了一个防出气装置（软质的垫片）遮堵出气孔，形似风筒防逆流装置，http:/ http:/ 在风门关闭过程中推动腔内的压缩空气将垫片堵住出气孔，而从另一小进气孔缓慢出气。通过此方式可以避免风门由于负压作用快速关闭，从而形成缓慢关闭状态。结构示意图见
4、下图： A pressure-relief devices, throttle pneumatic working principle: by the compression of air and spring cushion have the purpose of the relief. When the shutter opens pressure-relief devices by tail the spring shaft lever up, in the process of bounce through tail intake, air inlet, a large and a s
5、mall hole as the primary air flow. Air door is closed, the throttle shaft lever to resist, compressed air through the shaft sleeve cavity is slow. Main principle is one of the main air flow set up above a punching device (soft gasket) blocked air flow, similar to ram anti reflux device, push in the
6、process of air door closed cavity compressed air to shim block air flow, and a small inlet hole slowly to get out from the other. Through this way can avoid because of the negative pressure effect of air quickly shut down, forming a slowly closed. Structure diagram as shown in below:二、风门气动减压装置作用：通过风
7、门缓慢关闭的过程，从而避免由于负压大迅速撞击风门，造成风门变形、开裂，风门墙体、墙皮开裂、掉渣，影响风门寿命，影响质量和外观。利用此风门减压装置还能有效地避免因风门负压大挤伤人员、造成人身事故等。因此，建议对井下负压较大的地点试装此风门减压装置，推广应用成功后，http:/ http:/ 2, throttle pneumatic pressure-relief devices function: through the throttle slowly closing process, to avoid impact damper, rapidly because of the large n
8、egative pressure caused by air door deformation, crack, air door wall, wall crack, slag, affecting the service life of air door, affect the quality and appearance. Using the throttle pressure relief device can effectively avoid air inlet negative pressure big crowded injury workers, causing personal
9、 injuries, etc. Therefore, it is recommended that the location for the downhole pressure larger test and the throttle pressure relief device, after the success of the popularization and application, this device, processing production in large quantities widely used to mine, for safety production.三、安
10、装难点：风门气动减压装置与风门门框部位的连接可以用焊接好的扁铁和螺栓、螺帽连接，关键部位就是减压装置轴杆上的橡胶头与风门门扇部位的接触，接触点过小对风门门面依然存在撞击的破坏作用，可以考虑在门面撞击部位焊接与橡胶头相包容的坚固物体。另外撞击点的力不是垂直作用于风门门面，对风门门面的摩擦作用力会增强，对门面依然存在破坏作用，轴杆上的橡胶头磨损程度也相应变快，增加更换轴杆上橡胶头的频率。因此，应考虑采用合理的受力方向，保证风门气动减压装置与风门门面之间的作用力处于垂直作用状态，可以采用扇形角度的风门气动减压装置，轴http:/ http:/ 杆接头与风门门面接触点之间作用力始终处于垂直状态，以维持
11、作用力的稳定和受力的平衡状态。以下是风门气动减压装置组成结构及安装位置结构示意图。 3, installation difficulties: pneumatic pressure-relief devices connected to the damper frame parts of the throttle can use welding good flat iron and bolts and nuts connection, key parts are on the pressure-relief device shaft rod rubber head and shutter do
12、or leaf area of contact, the contact point is too small to throttle the facade remains of impact damage, can consider to hit parts of body welding and rubber head inclusive in the facade of solid objects. In addition the impact point is not perpendicular to the force ACTS on the air door facade, the
13、 frictional force of damper appearance will enhance, damaging effects of facade remains on the shaft rod rubber head wear degree also quickens, accordingly increase the frequency of change on the shaft rod rubber head. , therefore, should consider to use reasonable force direction, ensure throttle p
14、neumatic pressure-relief device and damper forces in a state of vertical effect between facade, fan-shaped Angle of inlet pneumatic decompression device can be used, with throttle shaft rod joint appearance remain the state of vertical force between contact point, maintain the stability of force and
15、 stress state of balance. Below is air door pneumatic pressure relief http:/ http:/ composition structure and the installation location structure diagram.四、安装重点：风门气动减压装置的轴杆上至少须添加两道密封圈，保证与轴套接缝间密不透风，密封圈镶嵌在轴杆上车丝的凹槽内，紧紧卡住轴杆。4, installation key: throttle pneumatic pressure relief device on the shaft lever of must add at least two seal, impenetrable between assurance and shaft sleeve seams, sealing ring inlaid in wire rod on the slots, tightly stuck shaft rod.
