The working principle and features of explosion-proof electric actuator

電動執行器在經濟發展中，作為工業生產當中一個重要環節，起到了至關重要的作用，實現了這個行業的科學發展，為我國自控行業迎來持續增長發展的新機遇。防爆型電動執行器在易燃易爆產所一直都是工業生產需求所在。在中國工業生產當中，該系列產品使用多的就是中英合資天蝶閥門生產的防爆型DKJ電動執行器以及防爆系列伯納德電動執行器。
Electric actuators play an important role in the economic development as a crucial link in industrial production, achieving the scientific development of this industry and bringing a new opportunity for sustained growth and development in China's automation industry. Explosion-proof electric actuators have always been the demand for industrial production in flammable and explosive places. Among Chinese industrial production, the most used explosion-proof electric actuators should be DKJ explosion-proof electric actuator and Bernard explosion-proof series actuator.

防爆型電動執行器工作原理
The working principle of explosion-proof electric actuator

防爆型電動執行器以4-20mA 電流信號或0-10V DC 電壓信號為控制信號，通過380V/220V/110V 交流電源為驅動電源，防爆型電動執行器用于控制0°～270°旋轉的閥門及其他同類產品，可使閥門運動到所需位置，實現其自動化控制，防爆型型產品有dI和dIIBT4兩種，dI適用于煤礦非采掘工作面；dIIBT4用于工廠，適用于環境為IIA、IIB級T1～T4組的爆炸性氣體混合物。
Explosion-proof electric actuators use 4-20mA current signal or 0-10V DC voltage signal as control signal, and use 380V/220V/110V AC power supply as driving power. Explosion-proof electric actuator is used to control 0°～270° rotating valve and other similar product, which can make the valve move to the desired position and realize its automatic control. The explosion-proof products are divided into dI and dIIBT4. The dI is applicable to the non-digging working face of the coal mine. The dIIBT4 is used in factories and is suitable for explosive gas mixtures in the environment of IIA, IIB class T1 to T4.

防爆型電動執行器行程控制機構，采用十進制計數器原理，控制精度高。為全系列通用部件，其結構，其工作原理為：由減速箱內的一對大小傘齒輪帶動主動小齒輪（Z=8），再帶動計數器工作。防爆型電動裝置-防爆型電動執行器如果計數器按閥門開、關的位置已調好，當計數器隨輸出軸轉動到預先調整好的位置（圈數）時，則凸輪將轉動90°，迫使微動開關動作，切斷電機電源，使電機停轉，從而實現對電動裝置行程（轉圈 數）的控制。目前防爆型電動執行器被廣泛應用，主要用于易燃易爆的場合,安全系數高、操作功能強、性能穩定場所。
 Explosion-proof electric actuator stroke control mechanism adopts the decimal counter principle which has high control accuracy. For a full series of general-purpose components, its working principle is as follows: a pair of large and small bevel gears in the gear box drives the active pinion (Z=8) and then drives the counter to work. Explosion-proof electric device - explosion-proof electric actuator ,If the position of the counter according to the opening and closing of the valve has been adjusted, when the counter rotates with the output shaft to a pre-adjusted position (number of turns), the cam will rotate by 90°, forcing the micro switch to act, cutting off the motor power, making the motor stop, so as to realize the control of the electric device stroke (number of turns). At present, explosion-proof electric actuators are widely used, mainly used in flammable and explosive occasions, with high safety factor, strong operating function and stable performance.

防爆型電動執行器特點簡介：
The Brief Introduction of explosion-proof electric actuator features:

1.防爆型電動執行器外殼：鋁合金外殼經硬脂陽極氧化和聚酯粉末涂層處理，重量輕，具有很強的防腐能力，防護等級可以達到IP6 7，另有防護等級為IP68的產品可供選擇。能適用于各種嚴酷的工況環境。
1. The shell of explosion-proof electric actuator : the aluminum alloy shell is treated with stearic anodizing and polyester powder coating, light in weight, and with strong anti-corrosion ability, protection grade up to IP67, and there is also a option of products with a protection grade of IP68.It can be applied to all kinds of harsh working conditions.

2.防爆型電動執行器手操機構：手動操作可以通過扳動離合器的手柄來實現手動，通電后離合器可自動復位實現電控功能。另外，手輪的尺寸大小是根據開啟執行器所需的力矩設計的，能輕松、快速、便捷的開啟防爆型電動執行器。
2. The manual operation mechanism of explosion-proof electric actuator: manual operation can be achieved manually by pulling the handle of the clutch. After the power is turned on, the clutch can be automatically reset to realize the electronic control function. In addition, the size of the hand wheel is designed according to the torque required to open the actuator, and the explosion-proof electric actuator can be easily, quickly and conveniently opened.

3、防爆型電動執行器控制板：高性能的集成微處理器，在安裝現場不用進行復雜的設置，一鍵自動校準和自我調校功能給公祜提供了很大的便利。
3. The control board of explosion-proof electric actuator : high-performance integrated microprocessor, the installation site does not require complex settings, one-button auto-calibration and self-adjustment function provide a great deal of convenience to the public.

4.防爆型電動執行器密封：密封采用雙O型圈，以實現雙向密封。
4. The seal of explosion-proof electric actuator : the seal adopts double O-rings to achieve bilateral direction sealing.

5.防爆型電動執行器電機：特殊設計的感應式電機，啟動力矩大，啟動后能迅速達到峰值，內置過熱、過載保護。具有輸出效率高，度高、噪音低等特點。
5. The motor of explosion-proof electric actuator: specially designed induction motor, with large starting torque, quickly reaching peak value after startup, and installed overheating and overload protection. With the characteristics of high output efficiency, high accuracy and low noise.

6.防爆型電動執行器齒輪和自鎖裝置：當斷電時，雙蝸輪蝸桿機構和2級減速齒輪箱，能防止閥門因瞬時反轉而引起閥門的位置不，能防止反轉并確保閥門位置的準確、可靠。另外防爆型電動執行器具有輸出效率高，噪音低等特點。
6. The gear and self-locking device of explosion-proof electric actuator: when the power is off, double worm gear mechanism and 2 reduction gear box, can prevent the valve position inaccurate because of the instantaneous inversion, and can prevent the reversal and ensure the accuracy and reliability of the valve position. In addition, the explosion-proof electric actuator has the characteristics of high output efficiency and low noise.

7.防爆型電動執行器設計*、系列齊全：智能型、開關式、各類信號輸出型等能滿足各類自動化控制的需求。體積小巧、美觀大方：外殼采用鋁合金壓鑄，線條流暢，體積和重量僅相當于同類產品的35%。結構合理、通用性強：電機直裝、一體化輸出、智能控制模塊集成于電動執行器內，可適應各種配套功能的需要。多種電源、多種速度：可滿足多種工況的需求。多種保護、使用方便：過熱保護、過載保護、雙重限位。免加油、防塵、防水、防銹、可任意角度安裝。
7.Explosion-proof electric actuator has advanced design and complete series: intelligent, switch, all kinds of signal output and other types can meet the needs of all kinds of automatic control. Small in size and beautiful in appearance, The shell is made of aluminum alloy die-casting, which made the lines smooth, and its volume and weight equivalent to only 35% of similar products. The structure is reasonable and versatile: the direct mounting of the motor, the integrated output, and the intelligent control module are integrated in the electric actuator and can meet the needs of various supporting functions. A variety of power supplies and speeds can meet the needs of various operating conditions. A variety of protection can make it easy to use: overheat and overload protection, double limit. No refueling, dustproof, waterproof, antirust, and can be installed at any angle.