電動閥操作原理及維護保養(yǎng)

電動閥通常由電動執(zhí)行機構(gòu)和閥門連接起來，經(jīng)過安裝調(diào)試后成為電動閥。電動閥使用電能作為動力來接通電動執(zhí)行機構(gòu)驅(qū)動閥門，實現(xiàn)閥門的開關(guān)、調(diào)節(jié)動作。從而達到對管道介質(zhì)的開關(guān)或是調(diào)節(jié)目的。

電磁閥是電動閥的一個種類；是利用電磁線圈產(chǎn)生的磁場來拉動閥芯，從而改變閥體的通斷，線圈斷電，閥芯就依靠彈簧的壓力退回。

日常電動閥門維護保養(yǎng)

1、電動閥門應(yīng) 存干燥通風(fēng)的室內(nèi)，通路兩端須堵塞。

2、長期存放的電動閥門應(yīng)定期檢查，清除污物，并在加工面上涂防銹油。

3、安裝后，應(yīng)定期進行檢查，主要檢查項目：

（1）密封面磨損情況。

（2）閥桿和閥桿螺母的梯形螺紋磨損情況。

（3）填料是否過時失效，如有損壞應(yīng)及時更換。

（4）電動閥門檢修裝配后，應(yīng)進行密封性能試驗。

運行中的電動閥門，各種閥件應(yīng)齊 全、完好。法蘭和支架上的螺栓不可缺少，螺紋應(yīng)完好無損，不允許有松動現(xiàn)象。手輪上的緊固螺母，如發(fā)現(xiàn)松動應(yīng)及時擰緊，以免磨損連接處或丟失手輪和銘牌。手輪如有丟失，不允許用活扳手代替 ，應(yīng)及時配齊。填料壓蓋不允許歪斜或無預(yù)緊間隙。對容易受到雨雪、灰塵、風(fēng)沙等污物沾染的環(huán)境中的電動閥門，其閥桿要安裝保護罩。電動閥門上的標尺應(yīng)保持完整、準確、清晰。電動閥門的鉛封 、蓋帽、氣動附件等應(yīng)齊全完好。保溫夾套應(yīng)無凹陷、裂紋。

不允許在運行中的電動閥門上敲打、站人或支承重物；特別是非金屬電動閥門和鑄鐵電動閥門，更要禁止。

 

Electric valve operating principle and maintenance

Electric valve is usually connected by electric actuator and valve, after installation and debugging become electric valve. The electric valve uses electric energy as the power to connect the electric actuator to drive the valve, and realize the switch and adjustment of the valve. So as to achieve the pipe medium switch or regulation purpose.

 

Solenoid valve is a type of electric valve; The magnetic field generated by the electromagnetic coil is used to pull the spool, so as to change the opening and closing of the valve body, and the coil is powered off. The spool relies on the pressure of the spring to return.

 

Daily maintenance of electric valve

 

1, the electric valve should be stored in a dry and ventilated room, both ends of the pathway must be blocked.

 

2, long-term storage of the electric valve should be regularly checked, remove dirt, and rust prevention oil on the processing surface.

 

3. After installation, regular inspection should be carried out. The main inspection items are:

 

(1) Sealing surface wear.

 

(2) trapezoidal thread wear of stem and stem nut.

 

(3) whether the packing is outdated and invalid, if damaged, it should be replaced in time.

 

(4) After inspection and assembly of electric valve, sealing performance test should be carried out.

 

Electric valve in operation, all kinds of valve parts should be complete and intact. The bolts on the flange and bracket are indispensable, and the threads should be intact without loosening. If the fastening nut on the handwheel is found loose, tighten it in time to avoid wear at the connection or loss of the handwheel and nameplate. If the hand wheel is lost, it is not allowed to use a live wrench to replace it. It should be assembled in time. Packing gland is not allowed to skew or have no preload clearance. The valve stem should be equipped with a protective cover for the electric valve in the environment that is susceptible to rain, snow, dust, sand and other dirt. The ruler on the electric valve should be kept complete, accurate and clear. The lead seal, cap and pneumatic accessories of the electric valve should be complete and intact. Thermal insulation jacket should be free of depressions and cracks.

 

Do not beat, stand or support heavy objects on the electric valve in operation; In particular, non-metallic electric valves and cast iron electric valves should be prohibited.