閥門廣泛應用于國計民生的各個領域，由于要適應各種不同工況條件的要求，因而它的品種繁多數量巨大。我國的電動執行器制造業十分龐大，閥門廠家數以千計，遍布，目前我國已成為全球閥門產量和市場需求量大的之一。但是我國的閥門行業大多為中小企業，良莠不齊，年產值超億元的不到 10 家，即使與國內其他機械行業相比，無論在裝備上還是技術水平上也存在很大的差距，真正具有獨立研究開發產品能力的單位很少，因而在大型石化、核電、油氣長輸管道線等重大工程項目中，配套的閥門目前主要還是靠進口。
The valves are widely used in various fields of national economy and people's livelihood. Because they need to adapt to the requirements of various working conditions, they have a wide variety and a large number. China's electric actuator manufacturing industry is very large, with thousands of valve manufacturers all over the country. At present, China has become one of the countries with large valve output and market demand in the world. However, most of the valve industries in China are small and medium-sized enterprises, with mixed advantages and disadvantages. There are less than 10 enterprises with an annual output value of more than 100 million yuan. Even compared with other domestic machinery industries, there is a big gap in terms of equipment and technical level. There are few enterprises that really have the ability to independently research and develop high-end products. Therefore, in large petrochemical, nuclear power, oil and gas long-distance pipeline and other major projects, At present, the supporting valves are mainly imported.
對于執行機構廣泛的定義是：一種能提供直線或旋轉運動的驅動裝置，它利用某種驅動能源并在某種控制信號作用下工作。執行機構使用液體、氣體、電力或其它能源并通過電機、氣缸或其它裝置將其轉化成驅動作用。
The actuator is widely defined as a driving device that can provide linear or rotary motion, and it uses some driving energy and works under the action of some control signal. The actuator uses liquid, gas, electricity or other energy sources and converts them into driving action through motors, cylinders or other devices.
閥門電動裝置基本類型有部分回轉(Part-Turn)、多回轉(Multi-Turn)及直行程(Linear)三種驅動方式。
The basic types of valve electric device include three driving modes: part turn, multi turn and linear.
閥門電動裝置可分為直行程和角行程兩大類，它是自動控制系統中不可缺少的重要設備，其主要任務是將調節器送來的控制信號成比例地轉換成直線位移或角位移去帶動閥門、擋板等調節機構，以實現自動控制。因而廣泛用于電力、冶金、石油、化工等工業部門的自動控制領域。
The electric valve device can be divided into two categories: straight stroke and angular stroke. It is an indispensable and important equipment in the automatic control system. Its main task is to convert the control signal sent by the regulator into linear displacement or angular displacement in proportion to drive the valve, baffle and other regulating mechanisms to achieve automatic control. Therefore, it is widely used in the automatic control field of electric power, metallurgy, petroleum, chemical and other industrial sectors.
廣泛采用和吸收微計算機控制、微機械等新技術、新成果與成熟經驗，閥門電動裝置得到迅速發展，現已廣泛使用“微機+隨動系統”結構模式的微機型閥門電動裝置，由微處理器完成信號傳遞、調節參數切換、狀態指示、控制量的輸出，以提高調節性能、使用及維護保養等方面的靈活性。
New technologies, new achievements and mature experience such as microcomputer control and micromachining have been widely adopted and absorbed. The valve electric device has developed rapidly. Now, the microcomputer type valve electric device with the structure mode of "microcomputer+servo system" has been widely used. The microprocessor completes the signal transmission, adjustment parameter switching, status indication, and output of control quantity, so as to improve the flexibility of regulation performance, use, maintenance, and other aspects.
閥門電動裝置的可靠性是指它在規定的條件下、規定時間內完成規定功能的能力。
The reliability of the electric valve device refers to its ability to complete the specified functions under the specified conditions and within the specified time.
“規定的條件”一般可概括為：
The "specified conditions" can generally be summarized as:
(1)環境條件：指能影響閥門電動裝置性能的環境特性，如溫度、濕度、氣壓、磁場、機械沖擊、振動、粉塵等。
(1) Environmental conditions: refer to the environmental characteristics that can affect the performance of the valve electric device, such as temperature, humidity, air pressure, magnetic field, mechanical shock, vibration, dust, etc.
(2)動力條件：指能影響閥門電動裝置性能的動力特性。
(2) Dynamic condition: refers to the dynamic characteristics that can affect the performance of the valve electric device.
(3)負載條件：指能影響閥門電動裝置性能的負載特性，如力矩、被控對象的類型與特性等。
(3) Load condition: refers to the load characteristics that can affect the performance of the valve electric device, such as torque, type and characteristics of controlled objects, etc.
(4)使用和維護條件：閥門電動裝置的可靠性只有在使用中得以實現，并在維護中得到提高，對于使用和維護條件而言，要注意的是完善的使用和維護保養；其次是需要要求操作者達到相應的技術水平。
(4) Use and maintenance conditions: the reliability of valve electric device can only be realized in use and improved in maintenance. For use and maintenance conditions, the first thing to pay attention to is perfect use and maintenance; Secondly, the operator shall be required to reach the corresponding technical level.
“規定的條件”是閥門電動裝置可靠性定義中重要而又容易忽略的部分。不同條件下，其可靠性是絕然不同的，離開具體條件談可靠性將毫無意義。而“規定的功能”是表征閥門電動裝置完成任務的各參量，如力矩、開/關及時間、行程、不動時間、死區等。
"Specified condition" is an important and easily ignored part in the definition of reliability of valve electric actuator. Under different conditions, its reliability is absolutely different. It is meaningless to talk about reliability without specific conditions. The "specified function" refers to the parameters representing the completion of the task of the electric valve device, such as torque, opening/closing and time, stroke, immobility time, dead zone, etc.
The above is a detailed introduction about Lianggong Valve Agency, and I hope it will be helpful to you. If you have any questions, please contact us. We will provide you with professional services http://www.szgotta.com.cn
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