包装袋（庄妃情）

Air preheater

... 本实用新型公开了一种空气预热器,包括若干相互连接的管箱，所述相邻管箱通过截面为Ω型的连接板连接，所述连接板包括弓形缓冲变形段和固接于弓形缓冲变形段两边沿的连接段，所述两连接段分别焊接于相邻管箱的侧壁上；所述连接板由耐高温材料制作；该预热器管箱之间采用具有弹性的Ω型的连接板连接，避免了管箱受热发生形变而导致焊缝开裂。 ...

Christmas tree wellhead connecting device capable of uploading pressure data in real time

The invention provides a Christmas tree wellhead connecting device capable of uploading pressure data in real time, and relates to the technical field of oil exploitation. The Christmas tree wellhead connecting device capable of uploading the pressure data in real time comprises a fixed wellhead, a metal oil outlet pipeline is arranged at the top of the fixed wellhead, one end of the metal oil outlet pipeline is fixedly connected with a mounting pipe, the ends, opposite to each other, of the mounting pipe and the metal oil outlet pipeline are fixedly connected with connecting flange plates, and the two connecting flange plates pass through the space between the two connecting flange plates. According to the Christmas tree well mouth connecting device capable of uploading pressure data in real time, the compression air bag is compressed, gas in the compression air bag is led into the sealing air cushion in the clamping sealing frame through the connecting pipe, the sealing air cushion is ...