上密封组合：上密封组合分为挡料阀和上密封阀两部分。挡料阀为方箱形结构件，内有两块像西瓜皮样的阀瓣作类似球阀启闭的运动来完成挡料功能，阀瓣上方设有耐磨导流筒，外部传动采用液压+同步曲柄+同步齿轮完成内外瓜皮的同步反向线性运动。上密封阀是用来对料罐进行煤气密封，以保证高炉带压操作（约0.25MPa）的设备，阀板通过两个对称的异形曲柄+连杆完成阀板翻转提升动作，密封为软密封，外部传动为液压驱动。
挡料阀、上密封阀均设有位置传感器信号源。
Upper Sealing Combination:The upper sealing combination is divided into two parts of burden stop valve and upper sealing valve. The burden stop valve is box-type structural member with two valve flaps like watermelon cortex to carry through the movement similar to open and close of ball valve, so as to stop the materials. The wear-resisting flow-leading cylinder is set on the top of valve flap, adn the exterior drive adopts hydraulic pressure + synchronous crank + synchronous gear to complete the synchronous revese linear movement. The upper sealing valve is used to conduct gas sealing on burden tank, so as to ensure the operation with pressure (about 0.25MPa) of furnace. The valve plate achieves the movement on rotation and lifting through two symmetrical special crank + connecting rod. The sealing is soft sealing (the emergency nitrogen interface cooling is equipped), and the exterior drive is hydraulic pressure drive.
The singal sources of location sensor are equipped on the burden stop valve and upper sealing valve.
