防爆电磁阀是把设备可能点燃爆炸性气体混合物的部件全部封闭在一个外壳内，其外壳能够承受通过外壳任何接合面或结构间隙，渗透到外壳内部的可燃性混合物在内部爆炸而不损坏，并且不会引起外部由一种、多种气体或蒸气形成的爆炸性环境的点燃，把可能产生火花、电弧和危险温度的零部件均放入隔爆外壳内，明科阀门隔爆外壳使设备内部空间与周围的环境隔开。隔爆外壳存在间隙，因电气设备呼吸作用和气体渗透作用，使内部可能存在爆炸性气体混合物 。

 

     防爆电磁阀的优点: 

 

     1、防爆电磁阀工作寿命长。 

 

     2、防爆电磁阀工作制式：分长期工作制，反复短时工作制和短时工作制三种。防爆电磁阀均为长期工作制，即线圈允许长期通电工作。对于长时间阀门开通只有短时关闭的情况，则宜选用常开电磁阀。用在短时工作制而批量又很大时，可作特殊订货以降低功耗。 

 

     3、防爆电磁阀工作频率：动作频率要求高时，结构应优选直动式电磁阀，电源听优选交流。 

 

     工作原理: 

 

     电磁阀里有密闭的腔，在不同位置开有通孔，每个孔都通向不同的油管，腔中间是阀，两面是两块电磁铁，哪面的磁铁线圈通电阀体就会被吸引到哪边，通过控制阀体的移动来档住或漏出不同的排油的孔，而进油孔是常开的，液压油就会进入不同的排油管，然后通过油的压力来推动油刚的活塞，活塞又带动活塞杆，活塞竿带动机械装置动。这样通过控制电磁铁的电流就控制了机械运动。

 

 

Explosion-proof solenoid valve is a device may ignite explosive gas mixture of components are enclosed in a casing, the casing can withstand any joints or through the shell structure gap, penetrate into the shell of combustible mixture in an internal explosion without damage, and will not cause the light environment of explosive exterior by a variety of gases, or vapor form, may spark, arc and dangerous temperature components are placed in the flameproof enclosure, Mingke valve flameproof enclosure to separate equipment interior space and environment. Flameproof enclosure gap exists, because the permeability and gas electric equipment respiration, possible inner explosive gas mixture.

 

The advantages of explosion-proof solenoid valve:

 

1, explosion-proof solenoid valve long working life.

 

2, explosion-proof solenoid valve working standard: sub-system of long-term, repeated short-term work system and work system of three short. Explosion proof solenoid valves are long-term work system, which allows long-term power coil work. For a long time only a short time opened the valve closed, then it should use normal open solenoid valve. Short time work system used in large quantities when, can make a special order to reduce power consumption.

 

3, the explosion-proof solenoid valve operating frequency: frequency of demanding action, the structure should be preferred direct acting solenoid valve, the power to listen to the exchange preferred.

 

Working principle.

 

Solenoid valve in a closed chamber, in different locations to open a hole, each hole leads to different pipe, the middle valve chamber, both sides are two electromagnets, which faces the magnet coil is energized valve will be attracted to which side, through the control valve moves to block or leakage of different oil the hole, and an oil inlet hole Shichang opened, hydraulic oil into the oil will be different, then the oil pressure to push the piston oil first, piston and the piston rod, piston rod drive mechanism moving. This current by controlling the electromagnet to control the mechanical movement.