防爆電磁閥的介紹及原理
發(fā)布者admin??來源:未知??發(fā)布時間:2016-05-20 14:30
防爆電磁閥是把設(shè)備可能點燃爆炸性氣體混合物的部件全部封閉在一個外殼內(nèi)，其外殼能夠承受通過外殼任何接合面或結(jié)構(gòu)間隙，滲透到外殼內(nèi)部的可燃性混合物在內(nèi)部爆炸而不損壞，并且不會引起外部由一種、多種氣體或蒸氣形成的爆炸性環(huán)境的點燃，把可能產(chǎn)生火花、電弧和危險溫度的零部件均放入隔爆外殼內(nèi)，明科閥門隔爆外殼使設(shè)備內(nèi)部空間與周圍的環(huán)境隔開。隔爆外殼存在間隙，因電氣設(shè)備呼吸作用和氣體滲透作用，使內(nèi)部可能存在爆炸性氣體混合物 。
防爆電磁閥的優(yōu)點:
1、防爆電磁閥工作壽命長。
2、防爆電磁閥工作制式：分長期工作制，反復(fù)短時工作制和短時工作制三種。防爆電磁閥均為長期工作制，即線圈允許長期通電工作。對于長時間閥門開通只有短時關(guān)閉的情況，則宜選用常開電磁閥。用在短時工作制而批量又很大時，可作特殊訂貨以降低功耗。
3、防爆電磁閥工作頻率：動作頻率要求高時，結(jié)構(gòu)應(yīng)優(yōu)選直動式電磁閥，電源聽優(yōu)選交流。
工作原理:
電磁閥里有密閉的腔，在不同位置開有通孔，每個孔都通向不同的油管，腔中間是閥，兩面是兩塊電磁鐵，哪面的磁鐵線圈通電閥體就會被吸引到哪邊，通過控制閥體的移動來檔住或漏出不同的排油的孔，而進油孔是常開的，液壓油就會進入不同的排油管，然后通過油的壓力來推動油剛的活塞，活塞又帶動活塞桿，活塞竿帶動機械裝置動。這樣通過控制電磁鐵的電流就控制了機械運動。
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.
